It helps prevent cracks in the tile and grout due to moisture, humidity and temperature. Cement backer board is sturdy, waterproof, and an ideal substrate for any tiling job, inside or outside. Your email address will not be published. Learning Center Find the answers to your home improvement questions.
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This category only includes cookies that ensures basic functionalities and security features of the website. Privacy Policy. In my opinion, foam boards are generally adequate for inside walls, but I always prefer to install a standard cementitious backer board and a good sheet membrane like Wedi Subliner Dry for any outside walls.
The Wedi sheet membrane has a. That means these foam boards are 10 times more permeable to moisture! Hi Steve, really excellent post, many thanks for taking the time to share your expertise.
And can see all of the issues that you describe first hand. I think the foam sounds better in terms of its waterproof nature, but I am concerned over the strength of the wall if these are used. Could I ask, if this were your project in your own house, what board onto the studs would you choose to use? I just wanted to give a big Thank You for such a detailed and informative post.
There is no fan in this room and everything is approx 70 years old. I fear the amount of mold hiding behind the walls, so we are planning on taking her down to the studs and only keeping the bathtub. This is our first big solo renovation. This post was super informative and helped me understand the differences in backer boards, and which would be best for my situation durock. Plywood would be cheaper. I really appreciate your insight, thank you. My house is a post and beam constructed from an old barn.
Our main bathroom shower is a tub surrounded on three sides by walls covered with tongue and grove pine boards. Would you recommend that I use a cement board as a sheeting and then apply my foam backer board on top of that?
Since you are removing the original wall material, you would likely be required to meet the current code standards. I would suggest you install a cement board like Durock cement board because it apparently has a 2 hour fire rating. Kerdiboard does not seem to have any fire rating at all. Hi Steve, My tiler is replacing our tub surround in a condo.
The installation of wall drains like this one are quite involved, so you should make absolutely sure that the contractor you hire is experienced in their installation. This plate is important to prevent flex in this wall. I would never cut a notch out of it for any reason. If you cannot fur out the wall enough to allow the drain hole cutout to clear the bottom stud plate, I would not install it.
I would also recommend that you not install this wall drain on an outside wall unless the wall is furred out significantly as mentioned above to allow for adequate insulation in the wall adjacent to the drain pipe. Hi Steve, Can you talk about installing a shower wall drain? Any installation issues I should be concerned with? My primary concern is how reliable it is. Is this particular drain style difficult to install? Can you advise me on how to make sure the contractor we choose does a great job?!
Would you be comfortable using an experienced contractor that has never installed a wall drain? Thank you!! Any undertile waterproofing membrane like Redgard will essentially prevent moisture from getting into this margin between the pan and walls. I would recommend fiber taping the joint between the floor and walls and apply three coats of Redgard.
If you do this, you can install the backer board before you install the pan or afterwards. If you install the backerboard after, you should place the board directly on the mud pan. You do not want any gap between them.
Here is a fairly good video showing a mud pan installed with a Schluter Kerdi waterproofing membrane. Ask your questions……and if they get uptight or defensive, move onto the next one. And the answer was yes! She was certainly no expert in the details of shower waterproofing but because of her research, she was able to indicate to me that it was important to her. I think it makes a big difference.
I love your posts — thank you so much! Like plombing and waterproofing the niche? Just ask? I have not used the Durock sheet or liquid membranes but both seem like fine options for inside shower walls as long as the install directions are followed. Steve, thanks for the response. None of the shower walls are outside. Do I still need a waterproofing membrane over Durock cement board?
Is the membrane made by Durock good option? These two and a few others have very low permeability so they are important to use if one of your shower walls happens to be an outside wall. I would suggest that you check out my waterproofing membrane post if you want more info.
My installer will be using Durock cement board on the walls. What type of waterproofing membrane do you recommend over the Durock board. However, your contractor should have installed a waterproofing membrane.
I would never build a shower surround without applying a sheet or liquid waterproofing membrane to the tile backer board surface. Then the Wonderboard should be attached to all the interior surfaces and a waterproofing membrane applied. These foam niches come in various sizes so there is really no need to build a custom sized niche unless you insist on unconventional sizing.
Sorry for the bad news. I have a contractor and he used Wonderlite backer board. He did not put any liquid membrane on it or anything. He just put the tile on top of that. Is that safe? He also built a niche, but behind the niche is just drywall, not the Wonderlite backer board…he cut through that to build the niche. By AdminJeff T October 1st, wedipanels kingofrenovations kerdiboard goboard backerboard hardiebacker , bathrooms.
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