Yes, you need waterproofing behind shower tile. The main types of cement board you could encounter are Fibre Reinforced Cement (FRC) board and gypsum board. RedGard, on the other hand, is a liquid waterproofing membrane made by Custom Building Products. I also used a larger sized trowel than the one recommend by Schluter. Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar must be used to construct all KERDI seams to ensure watertightperformance of the system. Furthermore, if you're working in an older home KERDI-BOARD fits better than cement board in odd spaces. This is necessary to ensure that the membrane will adhere properly to the drywall. There is no cutting or fitting of boards, and a mortar bed is good for leveling and flattening uneven or out-of-level floors, which are common in old houses. 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. To properly seal a cement board for a shower, its important to first properly prepare the surface. Hi David. 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. How to install a kerdi membrane over cement backer board - Quora A good rule of thumb is 24 hours per inch of thickness, then one more day on top of that to be sure. The cement board needs to be clean, free of debris, and dry. 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. When cleaning thinset off of Schluter membranes, the manufacturer recommends using a wet sponge and taking care to avoid any scoring or inconsistencies on the surface of the membrane. Kerdi can even be installed over drywall. Most of the entries in the NAME column of the output from lsof +D /tmp do not begin with /tmp. For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. That means that you do not have to rely on a surface membrane or worry about the board failing if the core is exposed to water. If any is found, wait a few more hours and then re-inspect. If you want added info there's an old Kerdi thread here. When applying the thin-set, it should be applied in such a way that it fully fills any empty space between the Tile and Schluter product and is solid enough to support the weight of the tiles being installed. Using Kolmogorov complexity to measure difficulty of problems? I just a few weeks ago put kerdi on top of hardi-board in my shower and it was PAINFUL! Can you put Kerdi membrane over cement board? Cut the shower tray to size. Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? Overall, putting Kerdi over regular drywall can be done, with the proper steps in place to properly install the membrane and its components. 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. What was the indicator that let you know that spritzing was not enough, and that you needed to 'sponge' the Hardi? If a pipe or faucet ever leaks in the wall this will ruin your shower. Kerdi Vs. RedGard (Compared) - Build It Fine However, you do still have to take care to waterproof the seams and the fastener penetrations to create a waterproof assembly. 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. You absolutely need to include some sort of substrate (cement board, green board, regular drywall) with the Schluter-Kerdi waterproofing kit. You'll know the RG is dry when it turns reallllly dark bright red as opposed to the pinkish color when applied. Fixing that is not that easy though. Schluter Ditra VS Cement Board (Which is better?) I think it is engrained in me to do that so I forget to mention it. 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. Kerdi-Shower-T/-TS/-TT is a prefabricated sloped shower tray with integrated Kerdi waterproofing. While cement board may be the most common and widely-known tile substrate, Kerdi Board is giving it a run for its money. They are absorbed into the surface material and help keep moisture away from the substrate surface. When doing so, it is important to ensure that the drywall surface is clean and free of dust, grease, and loose paint. All it takes is the right preparation. Properly waterproofed Hardie board should last for many years. Then you can apply a thin layer of KERDI-FIX to the board, the membrane over top . RedGard On Hardibacker Board. This will ensure that the coating sticks to the cement board. Kerdi Board as a whole is much easier to install than Cement Board. Kerdi Board is suitable for a number of interior applications. The difference between the phonemes /p/ and /b/ in Japanese. When it comes to tile underlayment, your options can be categorized into three main classifications, each suitable for different tiling circumstances: Although cement board is the most commonly used underlayment for tile, Kerdi board is growing in popularity as a multifunctional tile substrate. Greenboard is the same as regular drywall. Yup! 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. Connect and share knowledge within a single location that is structured and easy to search. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Your email address will not be published. How "tidy" does the kerdi band need to be? And how do you keep too much water from interfering with the adhesion in the second scenario?Thanks!! Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? This flexible polyethylene layer is easy to install and can protect the tile from both cracking and moisture. taping and prepping cement board for tile - Home Improvement Forum Since my guys and I will be doing this for the first time next week, I 'd like to take advantage of your 'learning curve.' Other mistakes I was making early on:-over working the thinset. If you preorder a special airline meal (e.g. Rolling pin, good, now I can throw away my magnesium float.LOLCasey. Putting this stuff on walls is difficult and time . Seams and joints should also be waterproofed and caulked to prevent water from seeping through. However, if installed on drywall, it only protects one side. ".1) is is okay to use kerdi board instead of ditra on the floor? Make sure to use multiple coats, if necessary. Then you can apply a thin layer of KERDI-FIX to the board, the membrane over top, and use a rolling pin to press it down and ensure a secure bond. Most cement-based thin-set mortars are suitable; however, it is important to check the manufacturers instructions to ensure that the product is approved for use with Schluter systems. Without an underlayment, even the slightest movement of the subfloor can result in cracking of the tile and crumbling of the grout lines. Kerdi is not a user friendly product, and when you shrink your working time down it is downright stressful. Also - use a good thinset. Kerdi Board Vs. Cement Board (What's The Difference?) - Home Mindset Keep in mind, that, just to be safe, most professionals choose to install a waterproofing membrane on top of the cement board when installing in wet locations like tub surrounds or showers. The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece. I will say that to is easier to put the membrane over drywall than cement board. Cement board, Wedi board, Kerdi board, Hardibacker, Densshield, Durock, Permabase, or Wonder board . Will be doing a bathroom gut and will be laying durock cement board over plywood sub floor. There is a product called Kerdiboard you might want to look into. x 5-ft. and 3 x 5-ft. sheets of cement board are sized for efficient use around bathtubs and showers. Set ceramic and stone tile over the KERDI membrane with unmodified thin-set mortar, including large format tiles. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. A square foot of half-inch thick cement board weighs roughly 40 ounces, while the equivalent area of a Wedi board weighs about 75% less. Depending on factors such as room temperature, humidity, and ventilation in the area, this could take anywhere from 1 to 3 days. I simply sponge off the excess. What? Sweeby-Can you clarify- I undestood that the thinset would tend to dry out from the thirsty hardi or skim over from the air; so how does booking the Kerdi help with the first? Blocking should be constant across this area when openings are larger than your fist. Maybe try another brand of thinset? Additionally, all thin-set should be allowed to cure for 24 hours before tiles are installed. Here's how to get it right the first time, If you've got a steady hand, a few easy-to-find supplies and patience, you can install a tile backsplash in a kitchen or bathroom, Step 4 in swapping your tub for a sleek new shower: Pick your waterproofing materials and drain, and don't forget to test, Work with your contractors and installers to ensure a safe, stylish curb that keeps the water where it belongs, Get the benefits of a time-honored ritual without firing up the coals, thanks to easier-than-ever home steam systems, Landscape Architects & Landscape Designers, Outdoor Lighting & Audio/Visual Specialists, Out With the Old Tile: 8 Steps to Prep for Demolition, Convert Your Tub Space Into a Shower Waterproofing and Drainage, Steam Showers Bring a Beloved Spa Feature Home. Is this overkill? I'm guessing he put a 2x6 across for the curb? 3. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[580,400],'remodelormove_com-large-mobile-banner-1','ezslot_17',164,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-large-mobile-banner-1-0');As an added precaution, you may want to consider to adding a water-resistant layer afterwards, such as a caulking or flashing tape. The problem is on the back side of the drywall, which is not protected. Should I use Kerdi membrane or cement backerboard? Wedi vs. Kerdi Waterproof Membranes: Which Is Better? One of the company says they are going to apply kerdi membrane on the drywall, then tiles onto the kerdi membrane, and as such as cement backboard would not be required. The back side of the drywall fails and it is just as bad or worse than if it had an issue on the tile side. When it comes to using thinset with Schluter products, the Schluter-Systems website recommends using unmodified thin-set mortars specifically designed for use with Schluter membranes. Using self-leveling underlayment takes careful prep work. Shower walls construction made easy with Kerdi-Board panels. - La Tuilerie . see Prop 65 WARNINGS. . And we are using a drippy mixture, it slides off the trowel.

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