Make sure to use multiple coats, if necessary. We tried adding water to the thinset, we tried using a larger notch trowel, but nothing seems to make the Kerdi stick. But you might be struggling to figure out what kind of paint to use on garage walls. If so, that means breaking up the floor pan. Cement board is known to be very heavy and somewhat difficult to cut. As a contractor, I have been using Kerdi since it came out. We don't expect people to master this and in fact I know maybe two guys in my area (live in big city) that could do this. Kerdi is also used as shower lining, as required in IRC Section P2709.2 and IPC Section 417.5.2, over concrete, mortar, tile backerboard, expanded polystyrene foam board, prefabricated polystyrene shower trays, curb and ramp, gypsum board and masonry substrates." So, you can choose what board you want in your shower when using Kerdi. "..2) the kerdi band isn't stuck flat -- the edges in some spots are wavy. Schluter says that the Kerdi membrane and tile can be installed over standard gypsum wall board without any problems. I appreciate your help and your quick response. Furthermore, if another trade, such as the shower glass installers, makes a mistake then you'll be . Cut the Kerdi membrane to size using a utility knife or scissors. He would take his rough opening measurement and subtract the thicknesses of the tile, the cement board, and in his unique install method the purpleboard. It is important to seal any imperfections in the drywall to ensure a long-lasting installation and to minimize water infiltration. What are the differences between "paperless drywall" and "cement board"? It only takes a minute to sign up. ), Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended. I also used the Kerdi drain. Why does drywall work in a Kerdi Shower? - Terry Love Plumbing Advice if you go with vapour barrier, then cement board. 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. Kerdi Membrane Over Plywood ThePlywood.com What is a word for the arcane equivalent of a monastery? 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. Porcelain and ceramic tiles are stiff and hard materials, so if they are installed on an unlevel or bouncy surface they are highly susceptible to cracking. Sloped Shower Tray KST1220/1525 - The Home Depot. Cement board is a bit better, but you need to spray either one before applying the mortar so that it doesn't "skin over" before you can get the Kerdi up. For the floor I make a dry mix mud base and then the Kerdi membrane. When doing so, it is important to ensure that the drywall surface is clean and free of dust, grease, and loose paint. Kerdi Shower Pan and Cement Board Walls - DIY Home Improvement Forum Cement board is the industry standard when it comes to tile substrates and the most preferred among professionals when installing porcelain or ceramic tile. Learn more about Stack Overflow the company, and our products. Hardie board is a cement-based siding product that is water-resistant, but not waterproof. 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 recommend our users to update the browser. Redgard is a similar product. Its important to note that Kerdi membrane is not a structural base layer, so plywood should be installed and reinforced as necessary based on load requirements. To learn more, see our tips on writing great answers. The drywall's back side fails, and it's just as bad or worse than it was on the tile side. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. I would get someone else. We are no longer supporting IE (Internet Explorer), Do not Sell or Share My Personal Information. The bag says Mapei floortile mortar, it was the only unmodified thinset at our hardware store. What's the difference between a power rail and a signal line? It costs more but it;s worth it for the ease of install IMO. Self-leveling underlayment has many of the same advantages as a dry-pack mortar bed but doesnt require as much skill to install. 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. I still wet the walls first. The gridlines printed on the surface are beneficial for the installation process, also allowing for quick, neat cuts with a utility knife. #3 This is a DIY site. It looks like Kerdi membrane is ~$2/sqft ($200 for a 108sqft roll) and kerdi board is $3.7/sqft ($115 for a 4x8 sheet (Lowes)). I barely touch it with my hands before going to the tape knife. Allow the adhesive to cure for the amount of time recommended by the adhesives manufacturer. Sheets of glass mat gypsum are made from water-resistant silicone-treated gypsum, reinforced on both sides by fiberglass mats. An extra layer of thinset is then added to the surface of the cement board to adhere the tiles in place. 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. Depending on factors such as room temperature, humidity, and ventilation in the area, this could take anywhere from 1 to 3 days. All it takes is the right preparation. I think the first one I used was cheap and that was part of the problem. Putting this stuff on walls is difficult and time . Their lighter weight makes moving panels around during installation a cinch, which is a far cry from the heft of conventional cement board. The Kerdi-Line prefab pans and drains make me feel way more comfortable with the waterproofing. Ready to join the 100,000+ homeowners matched with pros? The cement board needs to be clean, free of debris, and dry. kerdi membrane over osb I will say that to is easier to put the membrane over drywall than cement board. Kerdi on shower curbs - JLC-Online Forums The tub flange can really be a pain in the butt when installing a tile tub surround. Builder saying he doesn't want to put my trim tile in here. Kerdi membrane is a waterproofing material that is designed to be used in wet areas such as bathrooms and showers before tiles are installed. The Kerdi membrane should be applied with the standard procedure, using a hogg brush or a notched trowel to spread the thin-set mortar and a roller to ensure appropriate adhesion. Can you put Kerdi over cement board? - TipsFolder.com BTW the older Kerdi thread referencedwas excellent. That's the way us "Tile Guys" do it all the time. You just need a hammer and wonderbar for the walls. Can be cut to size easily using a utility knife. Step 3: Apply Thinset. 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. #1 - Backer board has nothing to do with HD or any other big box. Send us an email: , What type of thin-set mortar should I use when installing Schluter, Using a Prefabricated Shower Tray and Ramp. As such, many homeowners and professionals find themselves wondering whether Kerdi Board or cement board is the better tile substrate. @JimmyFix-it - hardiboard is not really porous unless it is completely saturated. 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. Needed to interject a little "amateur humor. Using Kerdi Schlueter membrane with cement board. - Houzz Schluter says that the Kerdi membrane and tile can be installed over standard gypsum wall board without any problems. Like the example above. No, you do not need to install a vapor barrier, as Kerdi Board is the vapor barrier. Re: Kerdi on shower curbs. Kerdi Board is also significantly lighter in terms of weight than cement board, meaning they can be transported and lifted into place with ease evening hauling five panels at a time should be no problem. If cement board had been used, most likely the damage would have been much less that what I have to deal with now. What I would be most scared off is the fact that no inside or outside corners appear to have been used. What to use to flatten and prep wall before installing Schluter Kerdi membrane for tiling? LONDON. Cement board comes both in 1/4-inch-thick and 1/2-inch-thick versions. To waterproof Hardie board, you should choose a quality sealer that is designed for use on cement-based sidings. For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. There's a really great manual (with diagrams) that makes this all easier to understand. First, its super lightweight compared with the rest. We like that the Kerdi membrane material installs easily over almost any substrate, including standard wallboard. Not even the plumber's fault as it was just a bad valve. We just went through a learning curve on the Kerdi and Hardi. Modified vs. Unmodified Mortar With Kerdi Membranes Step 2: Determine the room's center. 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. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Your email address will not be published. Following these steps will help ensure that your shower space is properly sealed, and thus that the cement board is well protected from moisture. Why do you think each board should be able to move at all let alone independently? Installation; As the GoBoard is very lightweight, it becomes easy to . What to use to flatten and prep wall before installing Schluter Kerdi membrane for tiling? Thanks. For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. Unlike cement boards, you can bend this material without it breaking. You absolutely need to include some sort of substrate (cement board, green board, regular drywall) with the Schluter-Kerdi waterproofing kit. Schluter Kerdi 108 Sq Ft Waterproofing Membrane - amazon.com Then you can apply a thin layer of KERDI-FIX to the board, the membrane over top . But I did want to understand the cost breakdown as the walls then become WAY more expensive than it would be with Redguard. However if installed on drywall it is only protecting one side. Step 1: Measure the area. Connect and share knowledge within a single location that is structured and easy to search. If you are laying tile on floors that are wavy or out of level, self-leveling underlayment is a great solution. For the floor I make a dry mix mud base and then the Kerdi membrane. One of the major benefits of opting for Kerdi Board over cement board is the ease of installation. 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. Cement board is a good, reliable backer board that works well on both floors and walls. With Kerdi Board you get to enjoy an effective product that is lightweight, easy to cut, waterproof, and leaves behind no dust! link to How To Organize A Bathroom Closet. This will include installing its components, such as drain plate and drain collar, as well as Kerdi Band for further protection of seams and corners. rev2023.3.3.43278. To line niche shelves, for instance. 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. I've seen preferences regarding HardieBacker and the cement board products such as Wonder Board. bathroom - Kerdi Membrane over cement backerboard - Home Improvement This makes Kerdi Board suitable for a wide variety of interior applications, including kitchen countertops. Do I have to use Kerdi tape with Ditra membrane? It is also widely available and a relatively inexpensive option approximately $10 for a 3-foot by 5-foot sheet. All it takes is the right preparation. Using Kolmogorov complexity to measure difficulty of problems? By the time you switch from the RG application to the Kerdi installation, it should be dry. the cost of the tile job. How to install a kerdi membrane over cement backer board - Quora Kerdi Board Vs. Cement Board (What's The Difference?) - Home Mindset And how do you keep too much water from interfering with the adhesion in the second scenario?Thanks!! Schluter Kerdi-Shower-T/-TS/-TT 48 in. Cement board, Wedi board, Kerdi board, Hardibacker, Densshield, Durock, Permabase, or Wonder board . Connect and share knowledge within a single location that is structured and easy to search. What Is the Difference Between 'Man' And 'Son of Man' in Num 23:19? When I tried putting up the first sheets, which were only 36" x 39", and even though I had SOAKED the hardi, to the point water was pooling on the floor, the thinset was already drying before I got the Kerdi up, and I couldn't get it to adhere properly no matter how hard I tried. Though, each product comes with its own individual characteristics, and pros and cons. How did this project turn out? How to follow the signal when reading the schematic? Is it suspicious or odd to stand by the gate of a GA airport watching the planes? Sledge hammers for the floor, that might take a bit of time. I have corrugated metal shower surround & grab bars. Whether or not you need a Kerdi membrane is a factor of use. First, felt paper is stapled to the floor and covered with expanded metal lath. In a perfect job, it will waterproof. It is designed to form a waterproof layer between cement board and tiles, helping create a watertight installation. Let's start! You don't want to block off the end of the air chanel and trap half a sheet worth of air under there.-Not paying attention to the direction of my knife. Bulk update symbol size units from mm to map units in rule-based symbology. It is lightweight and made of expanded polystyrene. 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. We use a pump action garden sprayer and its usually dry by the time we clean the sprayer. When I tried to use the edge of my trowel [per schlutter video] I could see I was pulling a lot of the 'felt' off the backer. I used this to seal a 3 1/2 by 6 1/2 foot shower with 7 foot walls. There is definitely skill & planning required to doit right. Schulter Ditra is manufactured by Schluter Systems and is a 1/8 thick polyethylene uncoupling membrane that is specifically designed for tile installations. There are many different types of underlayment to choose from, but they all serve the same purpose. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Hardibacker is a VERY "thirsty" material that sucks the moisture out of the mortar VERY quickly and I don't like it. Kerdi Board vs. Cement Board: What Are The Major Differences? Creative, C'mon over for a beer! 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.