Once youre sure that the membrane is completely dry, you can then move forward with tiling. Schluter approves their waterproof Kerdi membrane over drywall. Welcome to the site. Furthermore, if you're working in an older home KERDI-BOARD fits better than cement board in odd spaces. Water-resistant gypsum board, or green board, was used in the past as a tile backer but is no longer recommended, mainly because better products are available. The grid lines on the surface are incredibly helpful for installation and making neat cuts. Putting this stuff on walls is difficult and time . Since KERDI is impervious, it does not deprive the mortar of its moisture. By: Author Olin Wade (Remodel or Move Stuff). To line niche shelves, for instance. Allow the adhesive to cure for the amount of time recommended by the adhesives manufacturer. A.Sean Gerolimatos, technical services manager for Schluter Systems, responds: With a few exceptions, unmodified thinset mortar is required for setting ceramic and stone tile over Kerdi membranes (800/472-4588, www.schluter.com ), as well as for bonding overlapped seams and connections to Kerdi drains. (3ft-3in wide)Or will the Kerdi membrane (with seams taped with kerdi band) prevent each board from moving . I've never had a failure. Ultimately, the decision between a Schlter system or a cement board comes down to the particular application and the goals the user has for the floor system. This is a very effective and popular method of installing tile, and one that ensures the tile doesnt crack. Why does drywall work in a Kerdi Shower? - Terry Love Plumbing Advice If you can avoid that, the demo would be ~easy enough to maybe have some friends who'd work for beer come over and help you knock it out. To install Kerdi Membrane, start by applying Schulter ALL-SET mortar (or similar) to your cement board substrate using a 1/4" x 3/16" V-Notch Trowel. The taping knife at a low angle makes an enormous difference, and I'm very grateful for that hint. The curb doesn't have to be any wider than a 2x4. How do I align things in the following tabular environment? After installing your mud bed, make sure it is fully cured before applying Aquadefense. By the time you switch from the RG application to the Kerdi installation, it should be dry. Should I redo this wall to avoid a mold sandwich? The main types of cement board you could encounter are Fibre Reinforced Cement (FRC) board and gypsum board. #2. Install an Uncoupling Membrane Between Concrete and Tile. x 33 ft. Waterproofing Membrane: Kerdi-Board 1/2 in. Yes, Schluter membranes can go over cement board. I can take a bit of it off the wall and roll it into a ball. Kerdi Membrane not sticking to cement board - John Bridge Like cement board, the boards are heavy and hard to cut. The Pros and Cons of Various Tile Backers | Family Handyman Do the prefab Schluter niches like the double unit 12 by 28shelf have a built in pitch to the bottom and middle shelves to drainoff water as shown in niche that you built in that thread? Properly waterproofing a shower area sharing a living room wall, Can I use cement accelerator to decrease setup time of modified thinset. Is it ok to fasten a shower surround to Schluter Kerdi curb? Mike Holmes uses backer on his show. Redgard is a similar product. A lot of folks like using cement board but it's heavy and requires a waterproofing membrane over it. Take care to cut the KERDI membrane to the appropriate size and apply it to the wall, ensuring that it is properly adhered and that the edges are sealed with KERDI sealant. Kerdi membrane over drywall in shower - qkfb.recidivazero.it However if installed on drywall it is only protecting one side. Modified thinset adhesive is a premixed product that contains latex or acrylic components which make it quite a bit more flexible than regular thinset adhesive and therefore better suited to some applications. Why are physically impossible and logically impossible concepts considered separate in terms of probability? see Prop 65 WARNINGS. Once this is done, continue the installation by following the directions for the particular Kerdi product being used. Schluter-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. Shouldn't take too long, maybe an hour or so. Schluter Kerdi 108 Sq Ft Waterproofing Membrane - amazon.com The tub flange can really be a pain in the butt when installing a tile tub surround. Ideally the DalSeal TS would fold into the gap between the wall and ceiling concrete board. The thin-set mortar should be mixed to a fairly dry consistency and then spread on the surface with a 1/4 inch square notch trowel. We are DIYers who have already remodeled one bathroom successfully, but this is our first time using The Schluter shower system. I ended up putting up a thin, skim-coat of thinset all over the hardi board, letting it dry, and then putting up the kerdi. However, if installed on drywall, it only protects one side. If you are looking for a way to minimize height buildup and eliminate a large level difference at thresholds, a mat product is a good solution. The cement board core itself is not waterproof, but it can withstand water without falling apart. Out of curiosity, why are any of you suggesting backerboard at all? Do you have any pictures? How to follow the signal when reading the schematic? Now there's nothing particularly wrong with fiber-cementit's just not my first choice. Yes, it is possible to put Kerdi over regular drywall. Tile can be installed directly over Kerdi-Board using the thinset method; For use with ceramic and natural stone tile; Return Policy; California residents. Once you have selected the right sealer, follow the manufacturers instructions and apply a generous, even coat over the entire surface of the Hardie board. Go with smaller bags or only mix half. We mixed the thinset, it wasn't as smooth as the utube video, but it was close, and we gave it ten minutes. Waterproof showers are the trend today, so RedGard is an excellent alternative to cement boards that act as vapor barriers. Ratings (91) (5) (91) (3 . Its essential to protect surrounding wall and floor surfaces from water or moisture damage that can occur in these areas. And for a more secure fit, you can also use screws. ", Signed,Never Hung Kerdi A Day In Her Life. Or will the Kerdi membrane (with seams taped with kerdi band) prevent each board from moving independently? craft paper or plastic is great if the inspector wants it but it is (should be) doing nothing for a tub surround that has HB/redgard/thinset/tile. She grew up surrounded by constant home improvement projects and owes most of what she knows to helping her dad renovate her childhood home. I simply sponge off the excess. With Kerdi Board you get to enjoy an effective product that is lightweight, easy to cut, waterproof, and leaves behind no dust! If you do not already have the hardi up, I recommend using real cement board (Hardi is a fiber-cement) or drywall. Can you put Kerdi membrane over plywood? - KnowledgeBurrow.com Step 8: Allow to dry. There are many different types of underlayment to choose from, but they all serve the same purpose. Kerdi membrane prevents water damage and mold development. The Schlter system tends to be more durable than a cement board, but it also depends on the particular application and the weather. One thing I do like fibercement (Hardie) for is when I need thin strips of cement board. If he did the framing for the shower, then in order to measure for it correctly, he would need to know how thick the tile is so that he can avoid exactly this problem. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[580,400],'remodelormove_com-leader-2','ezslot_21',165,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-leader-2-0');Once the seams are sealed, lay down a waterproof coating to the floor and walls of the shower space. Hardi is definitely a "thirsty" substrate but will work, even without a primer of RedGard. Waterproofing cement board is relatively simple and there are several different waterproofing products available. link to What Kind Of Paint For Garage Walls? the cost of the tile job. Properly waterproofed Hardie board should last for many years. Should I use Kerdi membrane or cement backerboard? Other mistakes I was making early on:-over working the thinset. Good luck with your project. 120 sq feet including the floor. An extra layer of thinset is then added to the surface of the cement board to adhere the tiles in place. Been clankin' away at this computer for a couple of hours now, guys. Cement board (cbu) is not waterproof, but is not damaged by being wet. Can You Put RedGard On HardieBacker Board? - Next Modern Home Sheets of glass mat gypsum are made from water-resistant silicone-treated gypsum, reinforced on both sides by fiberglass mats. Important to overlap seams in a shingle method. Our thinset was more watery than the videos, but it still managed to dry out quickly, even in the time it takes to apply the small corners in our shampoo niche. A 1/2-inch thick, 3 x 5 foot sheet weighs just 7-1/2 pounds, compared with 45 pounds for a similar size sheet of cement board. This creates a strong, waterproof tile backer that also functions as an uncoupling membrane. #4 You could be adding a good 1000 pounds to your install too. Thanks to Mongo's earlier post, we knew we'd have to spritz the Hardi -- but found that even that wasn't quite enough. Overall, putting Kerdi over regular drywall can be done, with the proper steps in place to properly install the membrane and its components. The Kerdi/Daltile TS underlayments do have some valid applications such as in steam shower installations where a bullet proof vapor barrier is required. link to How To Organize A Bathroom Closet. RedGard, on the other hand, is a liquid waterproofing membrane made by Custom Building Products. Kerdi board vs. Membrane vs. Other for Shower - DIY Home Improvement Forum
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