Thanks. It installs with screws, then you tape the joints & screw holes and install your tile. This allows the cement to properly hydrate, resulting in a strong, dense bond coat. Whether youre installing tile on a floor, wall, or countertop, choosing the right type of substrate, or underlayment, is critical to preventing breaks and cracks in both the tile and the grout. When installing Schluter Kerdi Membrane over cement backerboard: Should I use Alkali Resistant Mesh Tape and thinset on the seams of the backer board (for long term durability to prevent each board moving independently thus preventing cracking) prior to installing the Kerdi membrane. What Is the Difference Between 'Man' And 'Son of Man' in Num 23:19? ".1) is is okay to use kerdi board instead of ditra on the floor? Hardie board is a cement-based siding product that is water-resistant, but not waterproof. Thinset with a latex acrylic modifier is best for interior projects, but if youre installing outdoors, you should use thinset with a polymer modified (PM) compound for greater moisture resistance. You absolutely need to include some sort of substrate (cement board, green board, regular drywall) with the Schluter-Kerdi waterproofing kit. Kerdi Vs. RedGard (Compared) - Build It Fine With that said, lets take a look at the importance of choosing the right tile substrate, the options you have, and which tile underlayment material you should choose Kerdi Board or cement board? Been clankin' away at this computer for a couple of hours now, guys. The problem is on the back side of the drywall, which is not protected. Yes, Hardie board needs to be waterproofed. Stack Exchange network consists of 181 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. We like that the Kerdi membrane material installs easily over almost any substrate, including standard wallboard. What precautions should I take installing tile on a backerboard in an area surrounded by cement? Also - use a good thinset. Your email address will not be published. Dean, our tile consultant, says glass mat backer board is his first choice due to the ease of installation, cost, and because his workers like it. For the floor, he should've put a mortar bed, then a membrane that goes over the curb, then another mortar bed. With cement board as a substrate, the key is to ensure proper installation of the membrane. If you want added info there's an old Kerdi thread here. that's home depot homeowner installation method. Why do small African island nations perform better than African continental nations, considering democracy and human development? In general, the Schlter system is typically more expensive than a cement board, and some people may find this an attractive option for its long lasting, easy to maintain qualities. Regardless, cement board is a great, trusted tile substrate that will work well on both walls and floors. Tile Shower SurroundCement Backerboard Location? The gridlines printed on the surface are beneficial for the installation process, also allowing for quick, neat cuts with a utility knife. Both Kerdi Board and cement board are designed to smooth out uneven spots on the installation surface, create an unbending layer that wont flex underfoot, and also provide a waterproof barrier. If you choose to use Aquadefense as a shower pan liner, be sure to continue it up the walls at least 6", tying into your waterproofing on the walls. To ensure that the Kerdi is completely dry prior to tiling, inspect the inside of the membrane for any signs of moisture or condensation. The cement board core itself is not waterproof, but it can withstand water without falling apart. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[728,90],'remodelormove_com-mobile-leaderboard-1','ezslot_24',166,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-mobile-leaderboard-1-0');If cement board is not waterproof, it can negatively impact the integrity of the tile that is installed on top of it, and can lead to a variety of issues. Even the tiling subs have moved away from mortar walls because of the labor cost and lack of craftsmen in the industry. However, a cement board is generally easier and less expensive to replace if a repair is needed. . We ended up sponging the Hardi and wetting and booking the Kerdi (a la wallpaper), and that made the installation go much smoother. Installation. Cement board is a mineral-based board, usually 30 inches by 60 inches, that is used as a lower, dimensionally stable surface for installing ceramic tile, porcelain tile, or stonework. Then cement, sand and water are mixed together to a crumbly consistency and floated over the lath to form a flat surface. I can take a bit of it off the wall and roll it into a ball. vegan) just to try it, does this inconvenience the caterers and staff? Will use the Schluter Shower system. Sloped Shower Tray KST1220/1525 - The Home Depot. As far as the tile/prep work, you are right that he is shifting the blame. The cement board needs to be clean, free of debris, and dry. #4 You could be adding a good 1000 pounds to your install too. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Your email address will not be published. We also found that using a heavy rolling pin worked wonders for really setting the Kerdi. GoBoard Vs. Kerdi For Your Shower: In-depth Comparison When screwed to the framing, thin strips of cement board fracture more easily than thin strips of fiber-cement. A mortar wall is better and can be customized easier. DIYers on this forum seem to have nothing but problems with Hardi. The main types of cement board you could encounter are Fibre Reinforced Cement (FRC) board and gypsum board. How long should I wait after painting on the Redgard before I try to reapply the membrane? The tub flange can really be a pain in the butt when installing a tile tub surround. Being a Los Angeles resident, Jessica spends a lot of her time looking for her next DIY project and sharing her love for home design. This product is available in 3/16", 3/8", 1/2", 5/8" 3/4", 1" 1-1/2" and 2" thicknesses, allowing for a wide variety of installation options. Given the complexity, its easy to see why even experienced tile setters avoid dry-pack mortar and use backer board instead when they can. Kerdi board, on the other hand, is an extruded polystyrene foam panel. I want to mount a cast iron bathtub, but not pull down my 1905 plaster and lath. It is easier to cut than cement board, it is mold resistant, and it has a built-in moisture barrier. I trust it and have never had a callback. When installation is done properly, Kerdi membrane offers a waterproof barrier that can protect the plywood below from moisture. To waterproof Hardie board, you should choose a quality sealer that is designed for use on cement-based sidings. Kerdi Shower Pan and Cement Board Walls - DIY Home Improvement Forum Installation instructions vary depending on the type of Kerdi membrane being used, but typically the membrane is applied directly to a clean, dry plywood surface that is free from dust, dirt, and other debris. To get the most protection from the cement board, it should be installed in a way that ensures it is waterproof, in addition to being secured properly with the right adhesive and screws. Underlayment is designed to smooth out uneven areas of the subfloor and form a rigid layer that prevents the flooring from bending. If done according to manufacturers instructions, it will seal nicely. It worked well - just like wallpapering. I guess I could save a few $ and laminate 1/4" drywall there instead.IOW, is hardi OK to level out the tub flange?Not that it matters, but the tile will be 3x6 carrara to the ceiling.Casey. 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. Asking for help, clarification, or responding to other answers. When installing KERDI with . It is also essential that cement board joints and fasteners be sealed and waterproofed with the Kerdi Fix sealant to help prevent water from leaking into the wall and floor cavities. Ditra is manufactured in a 3'3 width and comes in various roll lengths (54sf, 150sf, and 323 sf). Cement board is particularly vulnerable to water damage, so waterproofing can help protect it and help it last longer. 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. No bulges either, but definetly no thin spots.-Not paying attention to the direction of the comb. Depending on factors such as room temperature, humidity, and ventilation in the area, this could take anywhere from 1 to 3 days. Sledge hammers for the floor, that might take a bit of time. One of the major benefits of opting for Kerdi Board over cement board is the ease of installation. There are many different types of underlayment to choose from, but they all serve the same purpose. First Kerdi can be installed on drywall or cement board. The Schlter system tends to be more durable than a cement board, but it also depends on the particular application and the weather. First, you would waterproof with your favorite liquid waterproofing membrane of . We just went through a learning curve on the Kerdi and Hardi. Builder saying he doesn't want to put my trim tile in here. The mortar does . Using Kolmogorov complexity to measure difficulty of problems? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. What is a word for the arcane equivalent of a monastery? #3 This is a DIY site. Contact us: 888-472-4588 This flexible polyethylene layer is easy to install and can protect the tile from both cracking and moisture. I always install it over cement board or backerboard, never over drywall, even blueboard or the mold resistant greenboard. ps, now that you don't need it anymore you can throw that useless cheap piece of crap magnesium float my way. Why is there a voltage on my HDMI and coaxial cables? One thing I do like fibercement (Hardie) for is when I need thin strips of cement board. And how do you keep too much water from interfering with the adhesion in the second scenario?Thanks!! Then you can apply a thin layer of KERDI-FIX to the board, the membrane over top . In the worst case, it's OK to cut the Kerdi, remove the damaged section, scrape up the thinset from the areas, and set a new piece of Kerdi.
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