This is a complete guide to a non-toxic bathroom – safe for the chemically sensitive.
I cover: shower tiles, shower types, bathtubs, shower curtains, bath mats, caulk, grout, and water filtration.
I recommend all of the products here, some products have affiliate programs and some do not. Upon purchase, I earn a small commission through affiliate links at no extra cost to you.
Non-Toxic Showers
Safe Tiles
- Ceramic tiles are good (no off-gassing), they do often contain lead. They can also contain radioactive minerals.
- Porcelain – a type of ceramic, this does not have chemical off-gassing. You may want to avoid tiles with anti-microbials added to them.
- I prefer tiles that come sealed.
Lead in Ceramic tile
All ceramic/porcelain tile should be tested for lead. I tested tiles sold in America in 2021 and 2024 and even tiles from large retailers tested positive for lead.
You can see my results here:
Be extra careful with dust from cutting or demolishing tiles if you have not seen XRF results on them.
Lead is not the only toxic metal in tile glaze – zinc, barium, chromium, manganese, cobalt, and nickel can be used.
Some tiles also contain nano metals in the surface coatings including silver, copper, and titanium dioxide.
Tiles made in America may have a lower chance of having lead than imported brands, but it is no guarantee.
In this post, I go over brands that have made a pledge to not use lead and one of these brands was also tested by me.
- Slate and Marble – have a sealer on them already, and marble has a resin (which is applied to most marble before it hits stores). I have not been able to pick up an off-gassing odor from it, the resin appears to be cured and inert, but make sure it is tolerable for you. They need re-sealing so make sure there is a sealer you can tolerate.
- Glass tiles are inert and totally safe for the chemically sensitive.
- Concrete tiles – I choose concrete tiles because of the beautiful designs, though porcelain tiles now come in similar looks. It needs to be sealed if they are not sealed already.
The post on flooring goes into a little more detail on tile types.
Chemical-Free Mortar, Grout and Caulk
For non-toxic thin-set and grout brands, see my book and course.
Be sure to seal well between the sink and the wall, the bathtub, and floor, around the toilet (if using a toilet with water) with caulk. I have a post that outlines safe caulking compounds.
Shower Pans
I had to make a custom stainless pan for my tiny house because we did not plan the bathroom size around the ready-made ones.
Shower pans typically come in acrylic which would be tolerable for most people.
They also come in fiberglass (it does off-gas and scratches easier), engineered stone (most brands are 0-VOC), stone (sometimes with PVC under), solid surface plastics such as Corian and Durat (minimal off-gassing if any), and cast iron (very expensive but inert).
Shower Walls (Non-Tile Options)
Fiberglass, Acrylic, and Solid Surface Showers
Fiberglass and acrylic showers may be an option for those who are not super sensitive if you installed it yourself with a non-toxic adhesive such as AFM Almighty Adhesive.
Sensitive folks find that fiberglass takes a few weeks to a few years to off-gas. Fiberglass is low-end (not that durable, higher maintenance, and not that attractive).
Acrylic surrounds are a step up. There are affordable options as well as high-end options such as those by Kohler. They off-gas a little, but not as much as fiberglass. Many contain Microban.
There are more shower wall options in my book and course.
Tadelakt Showers
Tadelakt is a natural waterproof finish for bathrooms, including the shower area, that has been used in Moroccan bathhouses for centuries.
It is a labor-intensive finish made from lime plaster and olive oil soap which together produce a chemical reaction that provides waterproofing.
The downside of this finish is that you may need to polish it with olive oil soap as often as every month, it’s prone to cracking in my experience, and those need touch-ups as well.
So, you have to be willing to do upkeep with this one. I have seen mold grow in the plaster when it was not touched up.
For a how-to get a hold of this book: Tadelakt.
Metal Shower Stall
I used an aluminum shower stall in my tiny house and was really happy with it. I have a whole post devoted to my shower stall.
Stainless steel could also be used.
The galvanized buckets being used in tiny houses are not proving to be durable and leak-proof in the long run.
Non-Toxic Bathtubs
Enameled Steel
Typical tubs are made of enameled steel which is safe and tolerable for most people.
There have been concerns about lead in the enamel glaze. It was common in the past. Some companies like Kohler have stated they do not use lead in the glaze of their tubs.
The lead would only leach when the enamel is damaged and it’s not a form that is absorbed through the skin, says Dr. Mudgal, Toxicologist.
Though still, tubs, especially older ones can be checked for lead.
Tubs can be installed with mortar instead of glue.
Cast Iron
Cast iron tubs are the tub of choice for many people. New cast iron tubs, especially if made in the US, Canada, and Europe should not contain lead. You should check that the company claims no lead. The same questions and concerns stand as with enameled steel.
Some people like a cast iron tub with claw feet so that no leaks can go undiscovered behind the tub.
Acrylic and Fiberglass
Just like shower surrounds, tubs can be made of acrylic or fiberglass.
For the extremely sensitive these are not usually one of the top choices due to slight off-gassing in the beginning. Though with time these become acceptable.
I have heard from very sensitive folks who have done well with acrylic tubs and did not feel there was a problem with leaching or off-gassing. American Standard acrylic tubs are one brand that was reported to feel like it was a healthy material. They have freestanding and alcove tubs at Home Depot and Amazon.
Veritek is a brand name of fiberglass.
Acrylic and Porcelenosa tubs can be installed with mortar.
There are more options for bathtubs for sensitive people in my book and course.
Zero-VOC Shower Curtains and Bathmats
Shower Curtains
For a non-toxic shower curtain, I think EVA is the best material. Make sure it says phthalate-free like this one.
Polyester will work just fine for many people, though it’s usually coated with polyurethane (just like camping tent material). You may need to wash and air it out before use.
Those wanting to avoid plastic can use a hemp shower curtain, I like those from Rawganique. Make sure it can dry out fully between showers and that your humidity is not too high in the house. You may put it in the washing machine to help keep it clean.
If your house is relatively dry and mold-free and you don’t shower many times per day this might work out just fine for you.
Cotton and linen are more mold-prone but some very sensitive folks do use these without a liner. Take good care to dry them between uses and launder them. Replace them when necessary.
Non-Toxic Bathmats
Natural rubber (which is a latex and will have some rubber odor) works well for me.
I bought this OTHWAY natural rubber mat (pictured left in pink) because it had a good non-slip surface on top and also stayed in place with the good suction cups.
I am happy with it. It did have a natural rubber odor at first and I left it outside for a day (others might need to leave it for a few days).
If you don’t lay it out to dry after each use it does tend to grow mold.
TPE plastic is non-toxic and close to odor-free. They almost always contain Microban – I haven’t found one that doesn’t.
A Silicone mat is another non-toxic plastic that will become odorless with just a little bit of time. This is less common and usually more expensive, but extremely sensitive folks will most likely do best with silicone.
I find they all do need some time to off-gas after they come out of the package. Any flexible plastic or rubber needs to air out.
Water Filtration for the Bathroom
Shower Water Filter
This Culligan shower filter is NSF-certified. It contains activated granule carbon.
This Waterchef shower filter uses carbon block which is a step up. It is also NSF-certified.
While the NSF certification only addresses chlorine, we know the carbon block is especially effective at filtering out a wide range of contaminants from chemicals/VOCs to metals like lead.
I like NSF-certified filters and prefer carbon over other options.
Sprite is a Chlorgon filter material that is NSF-certified and like KDF.
Kinetic Degradation Fluxion (KDF) is a high-purity copper-zinc formulation that uses a basic chemical process known as redox (oxidation/reduction) to remove chlorine, lead, mercury, iron, and hydrogen sulfide from water supplies.
The process also has a mild anti-bacterial, algaecidic, and fungicidic effect and may reduce the accumulation of lime scale (source).
This study shows that KDF with carbon does not increase the amount of copper and zinc in the water.
Many other non-certified filters contain an unknown mix of minerals.
Bath Water Filter
There are not too many bath faucet filters. This one pictured, and all the others that I see online right now use KDF filtration.
KDF is explained above.
Lead-Free Faucets
It’s difficult to find 100% lead-free faucets for the bathroom sink, tub, and shower.
MGS an Italian company makes faucets including shower heads that they claim are 100% lead-free. But they are pricey and need to be special ordered.
Nivito, and in Canada, Bay Castle makes 100% stainless faucets, though I have not been able to get through to Bay Castle about their bathroom faucets.
There are more brands in the book.
American Standard makes bathroom faucets with the “Lead-Free” certification, which means they can contain up to 0.25% lead, but at least they have been tested.
There are more options in my post on lead-free faucets.
I have not seen a showerhead with this certification yet.
Non-Toxic Medicine Cabinets
You can custom-make medicine cabinets with safer materials, or you can buy all-aluminum models like this Kohler cabinet via Amazon or via their website.
IKEA sometimes has metal options as well. Check to see if metal is the only component or if there is particleboard.
It’s not too difficult to find all-metal versions.
Preventing Mold in the Bathroom
Tile Backing Systems
Don’t lay tiles over particle board, or mold-prone green board. Always use a cementitious board behind tiles or the Kerdi and Wedi boards.
The Kerdi shower system can be used with cement backer boards. Make sure to test out the whole system including Kerdi Fix caulking (which claims 0-VOC).
There are also waterproof boards that are tile backer boards/waterproofing in one: Kerdi Board and Wedi Panels are recommended to produce the most mold-proof shower or bath assembly.
Both are extruded polystyrene (XPS) foam with a backing, Kerdi is faced with tri-lam facers containing paper, polyethylene, polypropylene, and interlaced polymer adhesive.
Kerdi did confirm there are no flame retardants added to the XPS foam.
Wedi is faced with fiberglass mesh (on both sides) and coated with synthetic polymer resin mortar. I would test those against your sensitivities, this one would not be odorless.
Here are the Wedi Panels (you can mention my name at The Tile Shop for 20% off).
I would consider WEDI and Schulter before a liquid-applied waterproofing system.
But Custom Building Products RedGard is extremely low in VOCs at under 5 g/l and Mapei AquaDefense is 0 VOC.
Wall Boards to Use Behind Shower (Prevent Mold)
Cementitious Boards
If you don’t use Kerdi board or Wedi panels (mentioned in the section above), the best material for behind showers is cementitious boards.
Cementitious boards that can be used behind the shower and other wet areas are Durock (zero-VOC), Hardibacker, and Permabase. (You can mention my name at The Tile Shop for 20% off).
I noticed the off-gassing of Durock myself and it does not smell zero-VOC to me, but behind tiles or a shower can be fine for most people.
What chemicals are added to cement backer-board?
Cementitious backer boards are made from cement – they can contain fly ash (which can have residual toxic metals), quartz, and perlite. They can contain styrofoam. The fiberglass scrim typically contains PVC and a plasticizer (usually phthalates).
Should you use Magnesium Oxide Board Behind Showers?
The walls of my tiny house were made of Magnesium Oxide board which works in place of drywall or cement board in some cases. It does have a problem with cracking along the seams, at least in a tiny house.
Some folks are using MgO behind tiles but it is not the norm and we have seen numerous problems with MgO over the years, apart from cracking – there have been false claims about VOCs, and lawsuits over the leaching of salts with metal framing.
Some brands of MgO board I would consider are listed here.
WallBoard
I review Green board brands and alternative wall boards that you can use for bathroom walls (not behind showers) in the book and course.
Non-Toxic Cleaning Products
Now that you have gone through all the trouble to pick non-toxic materials, and taken steps to prevent mold growth, make sure your cleaning and personal care products are safe.
Going with natural cleaning products vastly reduces the chemicals you breathe in in the bathroom.
These are the ones I use and recommend.
For air fresheners suitable for the chemically sensitive, see this post.
More:
Mold prevention in the bathroom is covered in the book and course.
Non-toxic sinks are covered in the book and course.
Corinne Segura is an InterNACHI-certified Healthy Homes Inspector with certifications in Building Biology, Healthier Materials and Sustainable Buildings, and more. She has 10 years of experience helping others create healthy homes. You can book a consult here.
Join the top Substack on healing from MCS and mold!
Hilary
Hi there,
I was curious whether you had any recommendations for mirrors in the bathroom?
Thank you!
Corinne Segura, Building Biologist
just a regular mirror? all of them are fine as far as I know. For a medicine cabinet with mirrored front there is one in the article.
Amy
Hi! I’m interested in the Kohler Volute Bathtub which states that it is enameled cast iron with a white acrylic shroud. Is this still safe and considered non-toxic with the acrylic shroud?
(https://www.kohler.com/en/products/bathtubs/shop-bathtubs/volute-63-x-28-3-8-freestanding-bath-with-shroud-29325-0?skuId=29325-0-0&id=ps_goo_kbus_dtc_2025_22593499598_f03_c8d9e12m7g4&gclsrc=aw.ds&gad_source=1&gad_campaignid=22597233076&gbraid=0AAAAADES_DEXyZ49mE17XkeDTD2k_vgQM&gclid=CjwKCAiAh5XNBhAAEiwA_Bu8FQN17r5krMbYUdxcW_GSA7h_0mfQt87qCtBuxCAVLfwJgxyaFhN2kRoCeoAQAvD_BwE)
Brittany W
Hi Corinne, I am trying to figure out a shower pan as I want something easy to clean but have to find one that can be custom-made to fit existing shower that has a river pebble rock base with grout that is eroding away. Do you have any posts that talk about Onyx shower pans by chance? I see if is made from “a combination of alumina trihydrate (a byproduct of bauxite) and polyester resin” ….is Onyx and these materials fairly nontoxic? Do you think this would produce an offgassing smell? Thank you for this article! The mold proofing part at the bottom is also a very educational.
Corinne Segura, Building Biologist
This material is called solid surface, I talk about it a bit in the countertop post but more in the book
Megan
Hello, I’m a little confused. Is kerdi board alone enough for tile? Or do we need a cement board too? If so, does the cement board go behind kerdi board and then tiles meet up to kerdi?
Corinne Segura, Building Biologist
If you are doing this yourself I would suggest taking the course from Shculter
Shalene
Hello,
What is your opinion on the most non toxic, no-low voc product for bathtub chip repair?
Rachel Myers
Hi Corinne, we are patchwork remodeling our bathroom. The shower has decent tile attached to cement board that we are going to leave. We are going to replace the ceiling since the previous owner textured it horribly. We are thinking of using cement board on the ceiling and putting redguard over it before applying drywall mud and then painting and priming it. Would this work? We have now installed a strong bathroom fan that is vented outside. For the walls that meet up to the tub and shower tile we installed regular gypsum drywall and mudded over it and then primed it. I am wondering though if we should have applied redguard or if we still can apply it to make it more waterproof? We have a schulter/kerdi membrane on the floor under the tile and up behind the baseboards.
Corinne Segura, Building Biologist
I don’t think drywall mud sticks to redgard. you can use shculter boards on the ceiling though and skim coat it. You could also tile the ceiling. Though i haven’t found this to be a place of great concern unless you have high humidity and poor ventilation.
Kelly McPherson
What are your thoughts on the Berkey shower filters?
Kelly M.
Which would you recommend for the most chemically sensitive, porcelain enameled-steel tubs (assuming it doesn’t have PFAs), or acrylic tubs?
Corinne Segura, Building Biologist
enameled steel
Kelly M.
Thanks so much!
AP
I am also interested in responses to the questions posed by my fellow Marylander (post dated at March 21, 2025 at 6:33 am). I am looking for the same.
I am also curious about non-toxic options for re-glazing my bathtub and sink…if these exist. I am glad to have found this website!
Joe
I live in suburban Maryland (outside DC) and am considering some minor bathroom remodeling i.e. tiles, hand shower, safety bars, perhaps, new vanity, etc. But I am sensitive to chemicals, glues, toxic materials, particle board, etc. I’ve had a lung issue in the past.
Are there any bathroom remodelers in the suburban MD, DC or northern Va area competent with these issues, or are there suppliers in the area or any area I could order from, etc?
Thanks
Deanna
I am looking into covering my sink, tub, and shower with quick crete. They are at least 20 years old, and the sealer on the sink is peeling off. I cannot afford to buy new vanities and redo the shower or tub, because they were all custom-made by the previous owner. I was wondering if you think quick crete is toxic, or if there is a good non-toxic product that I could use for sealing it. Your expert opinion is much needed. Thanks.
Corinne Segura, Building Biologist
there are a lot of complexities here, it is more than what I can get to in a comment
Clara
Hello,
Most toilet seats are made of Duroplast. Are you familiar with this material? It doesn’t seem not toxic to me as I believe it is a mix of polymers and it contains formaldehyde, is this correct?
What are healthier options for a toilet seat apart from wood, perhaps PP?
Thanks!
Corinne Segura, Building Biologist
PP is best for toilet seats
Carla Henderson
Hello Corinne,
Are you comfortable using Showerguard – a baked in product for new shower glass doors to make them easier to clean? They are baked in so my thinking is that there are no VOCs or other chemicals released after the product has cured?
Thanks very much,
Carla Henderson
Corinne Segura, Building Biologist
I dont know what that is made of. I would make sure it’s not PFAS-based though it sounds like it’s not I would still check
Kelly McPherson
If Kerdi-fix claims 0 VOC while AFM’s caulk claims it does have some VOCS would Kerdi-fix still be a better choice for the chemically sensitive? Or are there other things in kerdi-fix that make it off gas worse than AFM’s? Or can it not be used for all caulk applications for some reason?
Corinne Segura, Building Biologist
kerdi might be better, you would have to test it out. we don’t have a full ingredient list.
DKI
Regarding bathroom faucets — I have not found any readily available that are 100% stainless steel. Parmir came the closest and has no CA prop 65 warning and is made of 304 solid SS. (They make solid SS kitchen faucets too). Because I need the fixtures installed before I can get the Parmir faucet delivered, I have been combing thru Ferguson’s webpage (both their ferguson.com and build.com (build with ferguson) sites) and they by far have the most info on every faucet — way better than home depot. They include compliance info, what material the faucet and handles are made of, etc. Build.com also lets you filter by material type, so you can avoid anything with brass and just click on stainless or zinc. (They do not have any solid SS bathroom faucets on their site that I have seen, all the SS is finish over zinc or brass). Also some of the Delta faucets for bathrooms do not have Pex lining — my guess is the ones with brass they line with pex so they are lead compliant. Anyway hope this helps someone on their search for 100% lead free or lower lead fixtures.
DKI
Parmir info: “Our environmentally friendly products are 100% lead free, rust resistant, anti-oxidant & completely recyclable. Whether used in a commercial or residential application, our unique high quality products stand out above the rest. Because our products are made with the highest standards containing zero brass, our sustainable designs are meant to last a lifetime and come with a limited lifetime warranty. Parmir has truly perfected an innovative, non-corrosive, sustainable product.”
Corinne Segura, Building Biologist
there is an article about lead free faucets, Parmir is not a company I have a lot of faith in
DKI
Thanks. I could not find a single review of Parmir or any info about their company other than they’re based in San diego and had to settle a CEC violation, which made me really doubt if their products were all SS as advertised. Also had no idea who the vendor of their products is. Lots of the lead free faucets are marketed more for kitchen and not bath; some of the companies like Waterstone dont make bath sink faucets that I could find — but I did briefly entertain the idea of putting kitchen sink faucets in the bathrooms!
I could not find any bath sinks that were advertised as 100% lead free, so I ended up contacting Ferguson and going with the Delta model (Saylor) that had pex connections and have handles and faucets made of zinc (the majority of bathroom sink faucets that I looked up were made of brass or “metal” with various finishes) . For tub spouts, I ended up with Kohler because the Deltas seemed to be mostly brass and all Delta spouts, trim kits etc had the prop 65 warning for lead (even though the trim and handle do not come with the valve, which is brass).
I am just frustrated that there are so many styles of such basic bathroom fixtures and yet none of them are 100% lead free. I feel like if these big companies prioritized safety over having 25 different models of the same basic sink faucet then more people would buy them. They’re missing a huge market of parents of young children who care about this and would pay more for something safe.
DKI
Also here is the Delta Saylor bathroom faucet I settled on. It’s made out of zinc and has Pex supply lines and connections. I may be able to update by testing it, but likely won’t because I usually brush and rinse with filtered water from kitchen.
https://www.ferguson.com/product/delta-faucet-saylor-two-handle-widespread-bathroom-sink-faucet-in-chrome-d3535mpudst/9929698.html
olivia schoultz
Do you have any toilet recommendations?
Corinne Segura, Building Biologist
yes there is an article on toilet coatings
Ed
Hi Corrine, did you have any luck finding a tub spout that was certified lead-free?
Corinne Segura, Building Biologist
in the article on lead free faucets there are some better brands that make bathroom faucets as well
Carrie
What about toilet seats? Is there a nontoxic option?
Corinne Segura, Building Biologist
The hard plastic works for almost everyone, I haven’t looked into if there is an alternative that is better (apart from the wood ones which would not be better for chemically sensitive folks).
John Thompson
Thank you for the information. Do you know of a no VOC non toxic bathtub refinishing product/service. Some say odorless and/or low VOC, but we have a chemical sensitivity to accommodate. Thank you.
Corinne Segura, Building Biologist
I don’t know of one, it’s not something I have researched in depth or written about
Katharine
Hi Corinne,
Thank you for this helpful page!
I wonder if you might be willing to weigh in on this important question, which I’m guessing many followers have: Before renting, what should one look for in construction & materials to ensure a shower is both 1) less likely to breed mold and 2) waterproofed correctly?
(Before renting, you can’t typically do a shower pan test, can only do limited (if any) moisture readings, and the landord/leasing agent may not know answers to questions like what’s behind the tile, so it seems like the renter needs to know what construction, materials, and defects to look for, & how to check for them.)
We need to find a new place ASAP, and want to avoid the same shower problems that the existing place has.
I would be grateful for any input you might be able to share. Thanks for considering.
Warm regards,
Katharine
Char
Corrine, I am so grateful for all your research. I have trouble finding specific articles as I am not swift on the computer. Knowing that I have 2 questions . First regarding bathrooms. What about Granite or quartzite for shower walls? To me seems less grout to worry about. But the ‘glue’ to attach? Need special? And the backing? Do I read correctly that Hardybacker is best? I am told only need to be sealed every few years as sealers are better now. then told every year. dont know who to believe. Or if the sealers are safe.
Now very large tiles available–so less grout. /New/ grout contains a sealer , needs less care? But is it safe. And choosing safe tiles. My head is swimming. Getting information is impossible. And now the real reason I came to your site: Cabinets. VOC free are incredibly expensive. Told at a paint store paint releases all VOCs when dry. Cannot learn if this is true. But more importantly—if cabinets have VOC in finish, will the chemical dissipate? If so , how long would it take? And if formaldehyde in box, unable to seal edges–any possibility the chemical danger would dissipate without sealing edges? I cannot find that post to refresh my memory. I have spent so much time researching so many things it has held up building. Costing more with delays. Could you please help me out I am cracking and ready to give up. First need is cabinets. Then Granite/quartzite question. Grateful for the direction and true answers you might share. Thank you, more than you can imagine. And now hoping I will be able to find your reply.
Corinne Segura, Building Biologist
the stone question is answered within this post. There are two posts for sealers – one for natural and one for synthetic. As for cabinets I have a few articles on that – one on bathroom vanity brands, one of offgassing levels and there is an article on how to seal in or promote offgassing.
Sarah
Shower curtain question. (Sorry, forgot to include it in my last post.) Any recommendations for an EVA shower curtain? All the ones I’m finding at Amazon and Walmart either have annoying visual patterns and/or have review that say they stunk! Any suggestions would be most welcome.
Corinne Segura, Building Biologist
I haven’t bought one for a while so the exact link no longer exists but I bought from amazon and I think walmart or similar in store in the past.
Sarah
Yeah, unfortunately, it’s a bit of a bust now in terms of options. Alas.
Sarah
Some misc thoughts…
I buy tub mats several at a time so I can off gas them for weeks, if not months. Then when I need to switch out my mat, I have one that’s good to go.
To check for leaks in walls, in addition to using a moisture meter (which has limitations in what it will pick up), it might be good to have a resource if one exists of an IAQ person who can periodically check using infrared technology.
The towel link goes to an Amazon page that says the product is no longer available.
And, as always, a huge thank you to Corrine for this website and her tireless research that she so generously shares!!!
Corinne Segura, Building Biologist
do you have a room for offgassing things?
Sarah
Yes. When weather is good, I sometimes use a small screened in porch. Otherwise, I use my climate controlled, unfinished basement. Not ideal since the HVAC is down there and obviously draws air from the space, but it’s still more isolated from the main living area of the house than otherwise.
Maile
So helpful, thanks. Do you have VOC or other chemical information about Kohler Luxstone showers? I believe it’s USA made with crumbled marble, fibers and other fillers (unknown to me). I don’t see anything on their site, and the company that installs says I’m the only person to ask about chemicals (I hear that all the time). Also, I was told they use green board (brand not stated) yet I read it shouldn’t be used behind showers. Don’t know if that applies when there’s no tile or grout. Any info would help. Thanks!
Corinne Segura, Building Biologist
I don’t know what Luxstone is I havent looked into it. I would not use greenboard behind any type of shower you can get mold from leaky faucets or condensation against the solid surface
Maile
Thank you!
Mary Delahunt
Hi Corinne,
I am urgently needing to know how to have a toilet and sink installed with the least possible materials: adhesives for example.
What material is least toxic for sticking the pipes together?
Do you do phone consultations? I have multiple chemical sensitivity.
Please could you text me?
Thank you so much for doing what you do!
Mary Delahunt
774-364-4463
email: marymdelahunt@gmail.com
Corinne Segura, Building Biologist
I only do email consultations and they tend to be quite booked up. My site covers these areas, caulking post, pipe article etc for the toilet use mortar.
Bonnie Andrzejczak
Thank you for your information. I am getting a glass shower door installed. The company has the option of adding a water proof coating, similar to Rain-x to the door. I am not sure if this is safe. I know there are carcinogenic chemicals in these products. Do they off gas once cured on the glass? Any help would be appreciated.
Thank you!
Corinne Segura, Building Biologist
i would not add something like that since it’s not necessary and looks like it needs to be reapplied. but i didnt look at the full ingredient list. so if you are comfortable with it you certainly can use it.
Mary Delahunt
Thank you for all the valuable information.
What I am looking for is advice on installing the toilet with the least toxic adhesive or sealant.
Do you do phone consults?
Corinne Segura, Building Biologist
I do email consultations under the consultation tab
Ali
Hi,
I’m looking at victoria & albert tubs as a lighter alternative to cast iron (going on the 2nd floor of an old farmhouse). I’m confused though if the resin they use is safe or not. Do you have any more info on them or any other safe alternatives?
Thanks!
Corinne Segura, Building Biologist
I don’t have more information that what is in the article about them.
Bonnie Andrzejczak
I just purchased a Limestone Victoria & Albert soaking tub. I contacted the company and they do not put any gel coatings on their tubs. It is pure limestone, polished until smooth. Very safe. Hope that helps you!
Corinne Segura, Building Biologist
it is limestone mixed with resin, resin likely means polyester but it could be a different plastic
A
Thank you for all your work! Any advice on toilets? I can’t find much info and the one I was eyeing has a prop 65 warning for lead
Corinne Segura, Building Biologist
i woulndt worry about lead in the solid ceramic glaze since it has no opportunity to be cut or eaten off of but there is a short article on additives in toilets
Lauren
Do the glass tiles use similar thin sets and grout as ceramic/porcelain tiles or is it different?
Will the AFM caulk work around the bottom of toilets?
For gluing sinks and faucets to new quartz countertops, will the Almighty Adhesive work for this? What about gluing down quartz countertops themselves? Is there a cleaner alternative for this?
Are the Corian shower bases made from resin? I have a problem with granite or anything with lots of resin like epoxy. I noticed you said there’s virtually no off gassing but I couldn’t find what they’re made from.
Thank you so much for your articles! They were super helpful in giving me ideas for my immune compromised family.
Corinne Segura, Building Biologist
see articles on countertops, caulking etc as they will have more info on these questions.
Kathi
I use your pages all the time and really appreciate the information. Do you know anything about MakeFit.com faucets and showerheads with kdf filters build in to them? I do not see that they say the fixture itself is lead free and non toxic.
Thank you.
Corinne Segura, Building Biologist
You would have to ask them, there is an article on lead free faucets and if you want it to be 100% lead free it would be made of solid stainless steel, 100% lead free brass, or have plastic tubing inside of the metal. Though even if it’s just “lead free” certified which contains some lead, a film develops on the inside over time which tends to block lead leaching. And with a showerhead that would be the least concerning faucet type since you don’t absorb that kind of lead through the skin.
Marj
Hi Corinne,
Thank you for your very informative post!
My husband and I have just bought our first house. We’ve had the floor tiles tested and heavy metals, incl lead and zinc, have been found in all of them. We would be super grateful for any tips on how to safely have these tiles removed. They do need to be removed, to have the mold underneath the tiles remediated and to have the asbestos removed.
Would you know of the safest way to go about this?
Kind regards,
Marj
Corinne Segura, Building Biologist
I can’t comment on lead remediation, it’s outside of what I’m qualified to comment on. You can find guidelines online though and make sure to hire someone who is a lead remediator.
Becca
Hi Corinne,
After pulling out a 1940 lead-leaching cast iron tub, we’ll be boxing in/tiling up the extra space (current tubs are smaller for that space). We minimized the tile we’ve pulled out, but there is a gap, and we’ve got DurRok cement board waiting to be cut and placed under some new tile.
That cement board smells … weird in a way that is troubling the kids and making me feel a bit off . I think it will be ok once it is tiled over, but it is a new smell I don’t recognize. Any tips for how to lessen it while we are in process? I’ve got a window open and a fan running (exhaust fan and electrician are next after this) — But maybe I should be wrapping the cement board vs outgassing and/or coating the surface with something before grout and tile ?
Thanks you so much- your research is so helpful.
Corinne Segura
yes there is some offgassing odor from the cement board but it will be covered by a waterproofing layer so that will essentially block it.
Becca
Do mean mortar and tile or another product/layer besides that? We’ve only understood that you tile right over that. I’m amazed how much I react to the cement board itself!
Corinne Segura
on the walls around a tub you definitely use a waterproofing barrier over the concrete board like schulter or redguard. on the floor sometimes people don’t do that but it is a good idea to use waterproofing there too.
britta
What about wainscoting, board & batten etc. on exterior walls or in bathrooms? Are there potential vapor barrier issues?
Corinne Segura
wainscotting can be made of PVC which would be a vapor barrier and could cause problems on exterior walls if AC is used inside. They are usually MDF though, which is breathable.
Mariane
Hi Corinne,
Any recommendations for an acrylic tub repair kit or product? We have a bid dent and it’s a bit deep. Trying to figure out if a kit would be ok or silicone would be appropriate?
I found this. Thought? https://fortivoshop.com/products/tub-tile-repair-kit
Thanks so much!
M
(To not duplicate the question with a new post)
I too am looking for the best bathtub repair kit.
(In my case it’s for some hard to spot cracks, hairline or smaller, poss only in the coating but I’d rather play it safe.) I would presume fiberglass or the other cheaper material, I don’t k ow for sure as it predates our buying the house.)
Sarah B
Hi Corinne,
Thanks so much for openly sharing your knowledge and expertise!
Can you share more about microban and the concerns around it?
Would you take a bath in a tub made with material containing microban?
Background: we’re considering a new bathtub from Mad City bath and their tub material contains it. Not sure if it’s actually really safe and can’t find much info about it.
Corinne
Microban is the company that makes many different kinds of antimicrobials. It’s usually impossible to find out which one it is. So I can’t make any calls on that as I don’t know what they are using in bathtubs.
Bee
Can I install a porcelain tile floor directly on a wood laminate bathroom floor? What non-toxic type of adhesive should be used?
Corinne
no, I definitely would not but luckily laminate is very easy to pull up (although rarely it is glued down)
Jon
Is there a non-toxic way to resurface an old tub? Also, does resurfacing seal in any potential metals? Christina Carnoy asked a similar question. Thank you!
Corinne
no non-toxic way as far as I know
Rusch
I appreciate you talking about non-toxic bathroom options. Health is important! Could you suggest a favourite environmentally friendly non-toxic material?
Manuel d'Almeida
Thanks Corinne for your website.
Great advice regarding toxicity in so many products.
Buy “Made in the USA” tho’ not 100% guaranteed, but safer than most countries. Too bad some products made in the good old USA is NOT 100% safe.
Violet
Do acrylic tubs contain phthalates or PFAS? We just got two for our home reno and the company later was not able to guarantee that tubs do not contain these chemicals. Quite disappointing. I didn’t think it would be a problem with tubs. This is what we purchased:
https://maax.com/product/rubix-6032-afr-acrylic-alcove-bathtub/105704/105704-r-000-001
Corinne
It should not have either. Phthalates are to make plastic flexible and this is a hard plastic. Plus acrylic itself does not use this plasticizers, only if it had a PVC coating on it. Also PFAS are not generally used on hard plastic household items.
Amy
Thank you for all your info!!! So helpful!
Have you used the stone bath mats before?
I have used Berkey, Pristine and Omica shower filters & water filters, loved all three of them.
Hoping to purchase some of the caulking and bathroom products so my apartment can fix my bathroom flooring without it being an issue, the joys of apartment living
Corinne
I use the rubber mat in the post but it does go moldy, I have bought it many times. still sticking with it.
Unknown
I have a house that we are having to take down plaster walls and replace with drywall due to mushy crumbling walls. What is the best VOC drywall to use for this that won’t leach chemicals into my home and what is the best sealing compound to seal drywall. House was built in 1863. Also wonder if lathe should be left on or would that cause moisture to build up behind the wall and cause drywall to breakdown and become mushy? What is the best VOC paint and primer to use? The house is also brick so all the outer walls are brick with plaster. We have been told best way to fix a few cracks that have occurred from house settling over the yrs is to put a layer of fiberglass mesh on the entire wall and then do a skim coating with a drywall finishing compound because this will best preserve it from recracking again. what is your take on this and what drywall finishing compound would be best to use? In bathroom we plan on putting in a walk in shower. According to what I am reading you reccomend using concrete backer board. We were unsure what would be easier to care for in regards to the surround like glass porcelain tile vs a one piece surround. What would you use as the floor base in the shower and the best material type for the surrounding? Also in regards to the bathroom fan which we are planning on installing I hear you keep mentioning the EVO system is this where they put a duct that runs outside through the side wall where we have our bathroom window. I have also heard of a fan system that reads the humidity level in your bathroom and automatically comes on when it reaches a level that is too high. What is your recommendation on this system? We would really appreciate your help since we do not have alot of experience with this! Any recommendations on a Green Builder in the Council Bluffs, IA, or Omaha, NE, area that you could refer us to or a site for Green Builder’s that we could go to? Thanking you in advance!
Corinne
there is a post on drywall, one on drywall mud and one on paint. But it sounds like you need to be 100% sure on the source of the moisture and correct the source before proceeding. I would talk to Cheryl Cieko about that.
carol grubb
Hi your info is so helpful.
Having a bathroom shower redone contractor wants to use Mapei mapelastic aqua defense to seal the durock boards is this stuff okay to use?
Will have him use the Shulter Kerdi shower system as you suggest with the durock behind the tiled walls thanks again for al your great info
DD
Hi Carol. Did you ever happen to find out the answer to this about whether Mapei aquadefense is okay? I’m wondering the same thing or if I need to go with Laticrete waterproof membrane. Thanks either way 🙂
Kelly M.
Hi, I am extremely chemically sensitive, can’t handle VOCs or fungicides/biocides. You said durock cement board seems like it off gasses even though it’s claimed VOC free, do Kerdi boards off gas ?
Also do you need to put an additional kerdi membrane on the kerdi board if using? Or is kerdi board with kerdi tape enough?
Do you know if all the kerdi products like board, tape, waterproof membrane, thin-sets are all VOC and fungicide/biocide free?
Kelly M.
I’m basically trying to find a good set up for porcelain tiles that is free of vocs, biocides/fungicides, and flame retardants. I bought your e-book recently and was thinking about doing Custom Blend thin-set mortar but after learning more about kerdi boards and all their kerdi type products and cement board brands I feel so overwhelmed lol.
Corinne Segura, Building Biologist
I haven’t tested the kerdi board but it would work for most people you would have to get a sample board. I mention the thinset in the book, i do not know if all the membranes and tapes are biocide free. Their caulking is less likely to be biocide free.
jennifer
Thanks for this great article! Wanted to ask where can we buy concrete tiles? I’ve only found cement tiles or “concrete look” ceramic tiles…
Corinne
I have seen some online still though the concrete look ceramic has become more popular and is definitely more convenient because it’s sealed
Giorgia
Hi Corine. Thank you for all the informations you provide!
I am about to start a Bathroom renovation and I was planning to paint the shower tile. What products do you suggest? Is there anything safe on the market, or I should just get over and keep the old tiles as they are? Thank you 🙂
Adam Bleakley
Hello,
I have a towel rack that came out of the wall and a piece of the wall came out. How to I fix that hole in the drywall without VOCs?
Thanks
Corinne
There is a post on non toxic drywall and one on drywall muds.
elka
Hi Corine ! Love your website and information that you share with us!
thank you
question: bathroom ceiling paint has cracked in some places, i assume it’s from humidity, it has a pretty thick layer that when pealed off i can see that putty was applied many times over and ceiling was painted after .
what would you recommend using to fix that, Previous owners were not chemical free house. What materials i should get..?
thank you
Corinne
The thing you have to do is figure out the cause, it could be a poor bathroom fan causing high humidity, maybe moisture from above, maybe it’s a vapour barrier paint causes a point of condensation behind the paint layer, maybe they skim coated and didn’t let the plaster dry first, maybe they painted without a primer etc
elka
Hi Corine
thanks for your reply,
at this point i need to fix this issue with non toxic free materials because i will be renting or selling my apartment soon. But i am living there for now and want to fix this .What materials would you recommend to use?
Jean
Hi Corinne — Do you have any recommendations for a non-toxic shower chair safe for MCS?
Many thanks!
Corinne
Anything made with polypropylene would be fine by my standards.
Jean
Do you know if “high impact polypropylene” is also safe for a shower chair?
Thanks!
Corinne
All hard PP
Jean
Antimicrobials seem to be added to the polypropylene for shower chairs. I’ve always been told to avoid these chemicals… Do you know of any manufacturers who don’t use the antimicrobials or stores that might carry safer chairs? This is so hard to figure out — the information re: antimicrobials isn’t listed online and by phone the manufacturers won’t say which chemicals they use. Any ideas on this are much appreciated — thanks!
fanpelis
Nice Post!
Mark Graham
Speaking of Hardie backer cement boards I recommend not using them. For my bathroom remodeling project I have been doing a “try before you buy” for each product. I put one piece in the office, close the door, and leave it overnight. In the morning I open the door and take a whiff. If the air is polluted then the product fails the test and I do not use it. My contractor brought in one 3′ by 5′ piece of Hardie backer board. It didn’t even take all night for me to know. After a couple of hours, as I was in my office working, the air smelled atrocious. I mean horrendous. Anybody with chemical sensitivity would have rejected it. In my opinion it is unhealthy for any person. The air quality in my office was really stunk up and it was a clear no. My search continued for shower wall material that will not pollute the air in my house.
Rose
What did you end up using for your shower. I appreciate the feedback on the hardi
Aziza
Thank you for your posts!!! I have found your website so useful and you are simply providing general information for free!
I would like to ask you about Polymarble (Solid Stone Resin), it’s something you have mentioned about quartz and resin, maybe it’s a similar technology to make it. Do you think it’s generally a safe material?
Corinne
I would need to know what it’s made of.
LP
Hi there! Thank you SO MUCH for all you do! You’re helping me immensely!
What do you know about a waterproofing membrane called dragon skin? It’s a “mixture of latex polymers and other proprietary additives to produce a high quality elastomeric barrier.” On the specs page it says “VOC content is 6 g/L” and i have no idea what that means. https://sienaproducts.com/product/dragon-skin-2/
I’m considering using this to waterproof behind and under the sinks in my bathrooms. I’m sure you have better suggestions, though I’m only finding info on showers. Thoughts?
Thank you so much in advance for any input you may have! I’ve lived through mold multiple times (just barely the first time) and am now fairly chemically sensitive, I’m just not sure to what, specifically.
Karen T Campbell
Hi Corinne,
We are remodeling our bathroom and I have been trying to find a small vanity that is not toxic. My contractor gave me information on a cabinet company but they use a conversion varnish. I read that conversion varnishes are toxic. Do you know if this is true and if so, do you know of any companies that don’t use this? Any suggestions on what to use? I appreciate any suggestions!
Stacey
Hello Corrinne! I m looking for the new undermont black bathroom sink. Where can I find lead free and non toixc and no VOC bathroom sink?
Doreen
Hi, I am trying to avoid using tile in my bathroom. I see the concrete shower and bathtub can be a good alternative. However, I can’t find any article regarding toxicity of concrete especially when it is used for bathtub. Do you have any concern about leaching toxic material in concrete bathtub?
Corinne
Concrete is not toxic at all but to make it into a tub they will add additives and I’m assuming a sealant so that is what you would want to look at. I have not looked into concrete tubs.
Tami
Corinne,
What are your thoughts on using Green board with like swanstone products for behind shower wall?
Corinne
I wouldn’t use greenboard anywhere in the bathroom, I mention some alternative backer boards but many solid surface showers don’t require a backer board.
Trudye Nesbit
I recently had an acrylic walk-in shower installed. Every time I shower I get a weird taste in my mouth. I’m not sure if it’s the acrylic or the epoxy that was used. Now I am worried abut the health hazards. Are there any articles I could/should read?
Tami
Hi, I see you mention swanstone but I am wondering about the Veritek by swanstone also, it is a lesser weight for walls and also lesser cost. Also has a glosser look to go with an enamel steel tub, where swanstone is very dull finish to it. Its more of a matt but a dull appearance and pricy like $2,000 to $3,000 for tub surround where the lesser cost Veritek by swanstone is like $1,000. I like it is more glossy and will blend better with an enamel steel tub and full tub panel is 85LBs where swanstone is like 250 lbs for full surround for walls. . Just wonder your thoughts on this. Especially health wise for toxic free home.
Corinne
The Veritek is mentioned, it’s a fiberglass product so I would expect some offgassing there but I have not seen it in person. It’s best to see a new slab in person to see how you do with it if you are sensitive to chemicals.
Tami
HI Corinne thank you, I was told by swanstone that their swanstone & Veritek both have fiberglass in them, and both are solid surface but Veritek is thinner. Trying to find more information from Swanstone as there seems to be such differing information on their products in reading on line about them.
Annette Garcia
We have to demo our bathroom due to mold. I want to avoid drywall in the bathroom. Can I use cement board instead of dry wall?
Diane
You mention in tubs Veritek is fiberglass, I thought that was by swanstone and is acrylic? I saw swanstone sells a tub ( thinking of using their tub surround you mention in solid surface) and I believe it is acrylic but I may be wrong.
Stefan Robert
I’m worried about tiles with Microban on them. I likewise saw the tub tangle you suggested some time back has Microban on it.
Mike
With Swanstone you mention has little off gassing , but you need their adhesive, which does off gas. Although once installed will it still off gas through the swanstone ( with a tub surround)
Corinne
Swanstone is usually installed with silicone so it’s not too bad. I mean it’s harsh at first but will completely cure and is one of the best adhesives.
Diane
You mention with acrylic tub surrounds and tubs, can you off gas in garage before installing for a month or so? And do the acrylic tubs leach any toxins like if your soaking it it, plastics or anything?
Corinne
Yes you can offgas them first, ideally in a heated area. I would expect them to leach in the beginning yes, though I have not been able to find studies on that.
Meena
Can the KERDI system be used on glass tiles? Is it certified for that? Do they have a product that’s designed for glass tiles?
Corinne
Generally it’s not used with glass tile https://www.jlconline.com/how-to/interiors/glass-tile-and-kerdi-membranes_o
Celina Burns
What should I put on the non-tile walls in the bathroom and the wall behind the kitchen sink? Also Do I have to worry about a plywood subfloor since a layer of padding and the actual floor will be covering it?
Corinne
Cement backer board is usually specified behind wet areas.
Christina Carnoy
Best chemical free option to resurface a cast iron bathtub?
Thank you very much in advance!
Christina Carnoy
Diane
Looking for healthy cabinets I am opting for having a builder make cabinets, and using AFM Eco Lacq on on them. Have you had any expense with this?
What do you recommend for grout for tile? Also do you find pre sealed grout is safe?
I’ve been told that grout is safe and even a presealed grout is safe. AFM does make a sealer but I was told just buying presealed grout at any home improvement store I would not need that and it is safe. Just wondering your view ?
Corinne
Pre-sealed grout could refer to a number of different grouts, epoxy, polyurethane, or maybe one with a lot of latex in it. The post on grout and thinset will help https://www.mychemicalfreehouse.net/2019/07/non-toxic-grout-and-thinset-mortar.html
These are inherently significantly higher in offgassing than concrete based grout with a grout sealer like AFM Grout Sealer.
Diane
Hi, Thank you for so much information. I am wondering about Kaldewei tubs they make enameled steel and porcelain tubs? I believe some have micro ban I think ? Yet I read where it is best to go with enabled steel over acrylic. I do know I asked with Kaldewei in email and no lead in tubs. I am not sure of other enameled steel tubs?
Any tub brands you like, or types.
We will be taking out a fiberglass surround, replacing and with tile back.
Do you prefer using porcelain tile for more wear and less chance of lead, over ceramic tile?
Thoughts on Quartz bathroom counter top? Any issues with quartz ?
Corinne
I haven’t heard of microban added to enameled steep tubs, that seems completely unnecessary. Did you confirm this with them?
Diane
Yes I do not believe it has that in it.
Nhà Bếp Hoàng Gia
Thanks for the wonderful post!Those who come to read your article will find lots of helpful and informative tips.
Chris
Hi Corinne. I was wondering if you've learned anything about the toxicity of Dens Armor Plus? I had a 2×3 ft section of a lathe and plaster wall taken out in my daughter's bedroom that I need to have restored with mold-resistant something.
Truly Green
Also, when we removed the vanity we discovered that the bottom of the cabinet was somewhat braking apart (8 year old vanity cabinet from home depot, made of flake wood, which I know has formaldehyde). Is it encapsulated and can I get just another new one like it, as I seem to have a difficulty finding one that's made of solid wood under $350. And even some of the ones I found have either some MDF or particle wood parts in them, as well as wood veneers. Any suggestions?
Corinne
How about repairing the bottom of that one. Otherwise some of the cabinets companies in the kitchen post make bathroom posts. The good ones are definitely expensive. Depends how DIY you are and your level of sensitivities if you want to make something custom or go down to cheaper options.
Truly Green
I live in 6 story building. Had a leak in one of the pipes beneath my bathroom vanity. The plumber had to break the floor (original tile from from 1951 and concrete that is from about 20 years ago) and replace the pipe. What are the dangers I need to look out for?
He put everything back (all the debris) to cover the 2 square feet that he broke. Now the super needs to come and fix the floor. He told me he wouldn't be using any concrete. Just Thin Set Mortar. I will have him use the one you recommended. Are there any other dangers I need to be aware of? Should we have taken out all those pieces of old concrete and laid new concrete before doing thinset?
Any other things I need to be aware of?
I had a mold issue in the bathroom before but it was on the walls and ceilings only.
Thanks
Amy Richardson
My contractor wants to use a WEDI shower pan that is guaranteed against mold, BUT it requires the use of an adhesive. He gave me a sample and it still smells after weeks of curing on a piece of cardboard. Not sure if it's giving me symptoms, but I don't like the smell for sure. He thinks it will be fine since it's under so many layers. What do you think? And thanks so much for your detailed information. It's so helpful.
Corinne
That's a hard call without knowing more about how you have tolerated and reacted to many other things.
Only natural
I had a really bad experience with green planet paints in my bathroom. I have a window, but no fan. With just a month of applying their primer and paint over many layers of existing paint that was there from years prior, the walls are having mildew form on them in the area close to the ceiling. I keep the window open and the door is slightly open when I shower.
Now I have to clean all the mildew and repaint. It seems like most natural paints are not really suited for the bathroom. Can you suggest a paint and primer I can use for such a high moisture area? I have tiles around my tub that only go up about 5 feet. From then on its gypsum that was used when the building was first buit with many layers of paint over the last 60 years. Also what kind of fan can I use since there is no ceiling cavity?
Corinne
Thanks for the reminder. I do know that clay and many mineral paints should be avoided in the bathroom. Some people might get away with it with a good fan and short showers. It sounds like your humidity is way too high in there. Have someone come out who installs fans/ERVs and see what they could rig up. Check out the post on paints for more paint ideas.
Corinne
I would use the Transitional Primer if you are going to paint.
Unknown
Hi Corinne! Thank you for an amazing site! You wrote "If you are buying new wood-framed windows, the wood will likely have been treated with fungicides, and should be sealed with AFM Safecoat Safe Seal, AFM Safecoat Transitional Primer, or B-I-N Shellac Base Primer & Sealer (all low-VOC themselves)." Do you recommend using a sealer on the wood BEFORE we paint it? Would the sealer affect the type of paint we can use? Thanks!
Rebuild
Hi, I also researched the Laticrete shower/tub tile system as well, however there is not much information or feedback regarding reliability durability etc
Rebuild
Hi- Trying go choose the most nontoxic but reliable tile backing system for bathtub/shower tile rebuild.
What are your thoughts on toxity in regard to
1st option: Kerdi board, kerdi membrane, kerdi-schlutler do tra -basically kerdi tub surround/shower system?
2nd option:Wedi board?
3rd option:Hardie backer board usung Laticrete ggold certified hydrobarrier for waterproofing?
Final step-Mortar: Finally, the Platinum Laticrete gggold certified thin set mortar for all 3 systems prior to tile application?
Corinne
I would love to hear a report on sniff tests of Kerdi and Wedi board. I have not tested them.
Ms.Dig
And recs on plumbers caulk, tape, solder, glues etc for sealing pipes?
truth naked
This is such an awesome blog, but I spent an hour trying to find my previous posts and still can't.
Corinne
What do you mean? Your previous comments?
Unknown
Hi, I know you posted non toxic grout and thin set, but now I can't find it. Can you direct me. Also I know you mentioned putting down a net over subfloor, what is that again? Please email me jnewmaster21@aol.com thanks
Corinne
Here is the grout post https://www.mychemicalfreehouse.net/2015/10/non-toxic-grout-and-thinset-mortar.html
Not sure what you meant by net but I think the info you are looking for is in that post.
Sabrina
Hi! I am finding your site so helpful in screening materials for our remodel. Thank you for your exhaustive work in making all you've learned public!
I have a quick question: here in California they use asphalt to "hot mop" seal the shower floor. Do you know of any equally-effective and non-toxic alternatives? I am concerned about long-term offgassing issues from the VOCs in the asphalt.
Thanks!!!
Corinne
That tends to be quite regional doesn't it! I have only heard of that in CA. I would look into the Ditra system.
Sabrina
Thanks, Corinne!
Unknown
Hello, thanks for this article!
I have a question – I am looking for non-toxic lead-free backsplash tile. Glass subway tile was my top pick, based on this article. However, I stumbled across another article which mentioned that lead is commonly used in glass tile? Not sure if there is any truth to this? Any insight would be greatly appreciated. I really need to pick a backsplash tile soon, and I am stressing over accidentally picking something that contains lead since I have small children. Thank you SO much!!!
Corinne
Hi, I don't believe glass tiles have lead but with tiles always ask the manufacturer. They don't always disclose their lead levels so if you are very concerned, your next step is to ask for a sample of the tile and test it. I also would not be super concerned as you would almost never touch backsplash tiles.
Help
Thanks so much for the reply! I really appreciate it! I think I should have mentioned that my husband will be installing the backsplash so I gues I'm concerned about lead dust generating from cutting the tiles to size and during installation, etc. I will follow your recommendation to test in advance. Maybe I'll get my husband to do a test cut and then we can test the dust generated. Thank you!
Carol
Hi Corinne,
Thank you for this great website and all the work that you have put into it. I am concerned about tiles with Microban on them. I also noticed the tub mat you recommended a while ago has Microban on it. Do you have any information on Microban?
Thank you,
Carol
Corinne
Thanks for noticing that Carol. I wouldn't recommend Microban. I will look for a better bathmat tomorrow and update.
Emma Shulman
Hi Corinne
Do tiles typically emit high levels of VOCs if they have been treated? I am deliberating if I buy conventional tiles and just go for a VOC free adhesive and grout instead – seems a bit easier! I am based in the UK and we seem to be less eco friendly than in the US!
Thanks.
Emma
Corinne
Ceramic, porcelain and glass tiles do not emit VOCs.
Somebody
Hello. You said "Don't lay tiles over toxic particleboard or green board". To do tiles one usually has to put toxic ply underneath. Even if its toxic, the toxins will be sealed underneath the tiles and can't travel through. So why do you say not to do that? Thanks
Corinne
Hi, tiles should be over cement board in order to not get mouldy. Grout is vapour permeable as well so would not seal in toxins.
Mary Lamb
Thanks again for taking the time to address my concerns! I've found a tile guy who can lay tile with thick set mud the old fashioned way. We will see.. Thanks again!
Mary Lamb
Thank you. I was going to use Laticrete 317 but the Laticrete rep said that Hardibacker requires a modified thinset. Is there a way around this? I really would like to avoid any toxins and harmful vocs. Thanks again.
Corinne
I would call Haribacker. Unmodified thinsets should be used on concrete slab, concrete board and mortar beds. Without synthetic additives the thinset is prone to cracking. That is all according to Paula-Baker Laport. Thinsets with additives that are low odour and offgas quickly are c-cure multicure 905 and c-cure permabond 902. But those both still specify over ply or concrete board.
Mary Lamb
Hello,
Thank you for all your helpful information, it has guided me along the way to a healthier home. Need some advice. We are doing a partial bath renovation and need to do some retiling over hardibacker board on a shower wall. Can you give a recipe for a non-toxic grout? I can't find any that use lime. Also, the tiles lines will be very thin so I've read not to use sand in this case. Can I leave the lime out or is does it help with mold? A good mudset recipe would also be greatly appreciated. Thanks so much.
Corinne
The contractor should know the right proportions. the lime is optional. the sand can be very fine or crused. If using thinset you can use c-cure foormix 900, thinset 911, wallmix901 or laticrete additive free. Those are synthetic free. For vinyl additives: c-cure multicure 905, or c-cure permabond 902. For grout free of additives c-cure AR sanded grout 922, c-cure supreme grout 925, hydroment, mapei or summitville-700 summitchromes. use AFM safecoat grout sealer
Livia Koronko
Hithanks so much for this great site for building non toxic homesI have gone thru quite a bit as well trying to source out safe products for a kitchen and bathroom renovation in my existing home, wow it's quite time consuming. I am now looking for grout and sealer for the kitchen and vanity areas. You mention Potland cement, did you mean Portland cement?? I have also seen a product called Quartzlock. The AFM grout sealer looks pretty good. I did have some problems in the past tolerated the hard seal for some furniture pieces. I hope that this is better for me.
Corinne
Hi Livia, I know, it's so much to research and test. Yes portland cement is what I am using on my tiles. I tested a lot of the AMF products and the grout sealer smelled totally benign to me even when wet. The penetrating waterstop is a better sealer for cement though so that's the one I will use and it is also zero voc and to me had no chemical smell at all. I was impressed because Im used to so many zero voc products taking me completely out. They have sample sizes that you can buy.
Livia Koronko
Thanks!Now I'm trying to find a non toxic drywall that would be good for a kitchen backsplash area. I'm having a difficult time finding the magnum board as we are in BC Canada. I would like to use mosaic 12" mesh 1"x1" tile. I've ordered the AFM 3 in 1 adhesive, Mapei grout and AFM grout sealer. Now I'm wondering if I should have gotten the AFM penetrating waterstop as you've mentioned. Thank you so much for having this blog available, it has been so useful!! I read that MgO board comes from China. This is a bit worrisome with all the stories of the toxic drywall that has been coming from there. The product itself sounds really good though. Dragonboard sounds good too. We're just trying to find some of these products here in Canada.thanks again =)
Anonymous
What kind of bathtub did you go with? Do you know about any concerns of cast iron or acrylic leaching any chemicals?
Corinne
I only have a shower but it's been a challenge. I haven't decided yet. I am wary of fibreglass. For a tub cast iron would be the best option I think.
Anonymous
Ya that's what I was thinking, some say they are painted though. I guess I gotta make sure its porcelain enamel.
Anonymous
Have you heard of stains and concrete sealers from BRODA? If yes, what are you thoughts on them?
Corinne
I don't believe we should be using low-VOC products when there are chemical-free alternatives. Many low VOC or green washed products are not suitable for people with MCS and I certainly wouldn't want them in our soil or water systems either!
Anonymous
That's pretty much what I said to the lady selling it to me, cause they are out of the mexeseal. She said it's about knowing which VOCS are bad, and even organic, natural things give off some VOCS. She assures me this line is good. I would of rather had the mexeseal, but I need it soon. Where did you purchase yours from?
Anonymous
That's pretty much what I said to the lady selling it to me, cause they are out of the mexeseal. She said it's about knowing which VOCS are bad, and even organic, natural things give off some VOCS. She assures me this line is good. I would of rather had the mexeseal, but I need it soon. Where did you purchase yours from?
Corinne
It's true that some VOCs are worse than others but I don't think it matters so much if they are "natural" or synthetic chemicals. The most important thing for you is how much do they bother you and how fast do they offgass. But since it's hard to tell the long term effects/chronic illness effects I avoid chemicals everywhere I can. I haven't ordered sealer yet but I do have a whole posts on sealers with some links. I will order them online.
Anonymous
I really love your blog. We are building a house as we speak and trying to do it as non toxic as possible. I don't have MCS, but I don't want my family breathing toxic chemicals for the rest of our lives. Right now, unfortunately Magnum board doesn't fit in our budget because this is a temporary house for now ( we are building in the back quarters of our shop, I call it our "shouse", living there for 5-10 years, then building a house.) Anyways is there a cheaper, non toxic option for the walls in a bathroom you would recommend? If we put moisture resistance drywall up, will covering it with non toxic paint seal in toxins? Any info on this will help. Thanks
Corinne
DensArmor Plus and some other low toxic wall boards. Not sure of the price. One of the AFM primers on the post about Finishes will seal in most toxins but is not 100% VOC-free itself. Plaster or tiling will also help.
Anonymous
Thanks. Funny you mentioned the DensArmor Plus. I just found it at Lowes 🙂 I look forward to reading the rest of your blog. Lots of great info. Your links take me to Amazon.com, and they dont wanna seem to ship to me 🙁 In Alberta.
Corinne
http://www.propublica.org/article/american-made-drywall-emerges-as-potential-danger drywall may give off calcium oxide, sulfur dioxide, calcium sulfite.
Barefoot in the Kitchen
Great tips, thanks for the post.
Anna Dawson
The solution for not only you and the environment, but your pockets as well, can be natural household cleaners. Products that may already be in your home, or are easy to find and buy, can provide a safe, non-toxic road to cleanliness. Recently I got to interact with a carpet cleaner that claim to be the most greenest cleaner, I must say their services were really awesome.
Corinne
I would not use or recommend any cleaning product that has VOCs. I only recommend cleaning products with 0 VOCs which I outline on the page on cleaning products. most carpet is not recommended for people with significant MCS.