Hardie board is thirsty, but that's way too fast. 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. Yes, you should prime drywall before installing KERDI in order to ensure proper adhesion and a successful installation. The bag says Mapei floortile mortar, it was the only unmodified thinset at our hardware store. After priming, use an approved adhesive to adhere the KERDI membrane to the drywall, making sure the edges are well sealed and joints are tight.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[468,60],'remodelormove_com-medrectangle-4','ezslot_12',156,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-medrectangle-4-0'); A successful installation of KERDI requires well-prepared surfaces and a proper application, so take the time to properly prime the drywall before installation. You troweled on thinset combing it out then pressed the Kerdi into place? This is a bit difficult to answer as it depends on the particular application for the floor system. 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. Removing bathroom tile from cement backerboard, Transition from KERDI membrane backed, to not backed. It's a lightweight polystyrene board faced with Kerdi that comes in various thicknesses that you can use in place of drywall or cement board. Modified vs. Unmodified Mortar With Kerdi Membranes Personnaliser mon exprience l'aide de cookies, Landscape Architects & Landscape Designers, Outdoor Lighting & Audio/Visual Specialists, epoxy or marine paint over greenboard for my shower walls (not tile), Need advice on bathroom remodel - using hardiebacker boards, HELP! In order to determine which tile underlayment is right for your project, you need to know which issue youre trying to solve whether its preventing subfloor cracks from transferring to the tile, soundproofing, moisture protection, or providing more rigidity to the tile. It only takes a minute to sign up. builder, anti-builder, rebuilder -- Retired Moderator. I have corrugated metal shower surround & grab bars. The grid lines on the surface are incredibly helpful for installation and making neat cuts. rev2023.3.3.43278. It looks like you have Kerdi installed on the floor and not Kerdi Board. 4. Connect and share knowledge within a single location that is structured and easy to search. Like cement board, the boards are heavy and hard to cut. The 1/4-inch-thick board is typically used on floors and countertops. We store towels, medicine, toiletry supplies, first-aid gear, massage devices, facial steamers, spare Painting your garage is a great way to improve the look of the space and make the walls easier to clean. The Kerdi-Line prefab pans and drains make me feel way more comfortable with the waterproofing. PROBLEM SOLVED for Tub Flange when Installing Cement Board - YouTube 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. They are absorbed into the surface material and help keep moisture away from the substrate surface. Rolling pin, good, now I can throw away my magnesium float.LOLCasey. We tried adding water to the thinset, we tried . I've seen preferences regarding HardieBacker and the cement board products such as Wonder Board. How to prep a shower for tile with Schluter Kerdi - TwoFeetFirst see Prop 65 WARNINGS. The niche' intermediate shelf isn't actually attached, to enable specific placement for each unique tiling application. 120 sq feet including the floor. Ceramic and porcelain tile, more than almost any other surface material, need a stable . Kerdi Membrane is a product of Schluter systems. However, you do still have to take care to waterproof the seams and the fastener penetrations to create a waterproof assembly. Hardi is definitely a "thirsty" substrate but will work, even without a primer of RedGard. It also helped me to work in smaller sheets. @JimmyFix-it - You are right. When applying the primer, make sure to cover all surfaces thoroughly, as these will be completely covered by the KERDI membrane. If you are laying tile on floors that are wavy or out of level, self-leveling underlayment is a great solution. is the contractor creating a waterproof schluter-kerdi shower? you should still water proof with a liquid membrane product like RedGuard. I have watched it done 10-15 times, have good skills, and if I tried to make large mortar walls myself it might like a little kid threw up concrete Should I use Kerdi membrane or cement backerboard? Plus, if you use the mold and moisture resistant drywall, it will be extra insurance against mold. Maybe try another brand of thinset? Well, I'm going to give you three different ways to seal the backer board at the tub flange. How to follow the signal when reading the schematic? Once all that is completed and the Aquadefense has dried, you can install your tile with a polymer modified mortar meeting the ANSI requirements of A118.4 or A118.11. @JimmyFix-it - hardiboard is not really porous unless it is completely saturated. bathroom - Kerdi Membrane over cement backerboard - Home Improvement Regardless, cement board is a great, trusted tile substrate that will work well on both walls and floors. If your going to do the job do it right, and give professional advice pls. Press the Kerdi Membrane into the Thinset Mortar with firm, even pressure to achieve full mortar coverage. Tile Backer Board Breakdown - DIYTileGuy Caulk the gap. You'll know the RG is dry when it turns reallllly dark bright red as opposed to the pinkish color when applied. Shower walls construction made easy with Kerdi-Board panels. - La Tuilerie Modified thin-set mortars must dry for the polymers to coalesce and form a hard . Just wondering how effective is the tile on kerdi membrane vs the traditional cement backboard where tiles are glued directly to the drywall? Please feel free to reach out to our Product Support Team at 1-800-992-6273 if you need anything. The site is called floorelf.com. The great thing about Kerdi Board is that it is lightweight and easier to maneuver. What is the proper substrate to use on tiled wall? We tried adding water to the thinset, we tried using a larger notch trowel, but nothing seems to make the Kerdi stick. Why is this the case? 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. This will help to ensure that all drywall is completely covered. Additionally, you can use KERDI-BAND around corners, seams, and joints to help with a waterproof installation. On the 'rolling pin', it actually wasn't the kitchen kind, but rather a very heavy metal roller DH had from some sort of fabrication table. Underlayment is designed to smooth out uneven areas of the subfloor and form a rigid layer that prevents the flooring from bending. Seems like I've been using the full measure of water the bag calls for, plus about 10%.-50 lbs of thinset at a time is too much for an amatuer. the cost of the tile job. Yes, KERDI membrane will stick to cement board. Schluter Ditra VS Cement Board (Which is better?) Kerdi, a waterproofing membrane made of a special polyethylene fabric, should be allowed to completely dry prior to tiling. I also used the Kerdi drain. The 30-in. Properly waterproofed Hardie board should last for many years. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. It is important to waterproof Hardie board to make it more water-resistant, as well as to protect the materials from the elements. Will be doing a bathroom gut and will be laying durock cement board over plywood sub floor. In normal residential use I wouldn't worry about it. Not even the plumber's fault as it was just a bad valve. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. The major drawback to cement boards is their weight, as they are incredibly heavy and can be difficult to cut. A lot of folks like using cement board but it's heavy and requires a waterproofing membrane over it. Start by cleaning the cement board with a mineral oil soap; this will help reduce mold and mildew growth throughout the life of the shower. vegan) just to try it, does this inconvenience the caterers and staff? Connect and share knowledge within a single location that is structured and easy to search. You absolutely need to include some sort of substrate (cement board, green board, regular drywall) with the Schluter-Kerdi waterproofing kit. 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? there should be a small gap between the backer board and the tub. Kerdi membrane can be used on cement board, drywall, and, as you may have guessed- greenboard. Some being easier to work with than others. It's still applied to cement board. Go with smaller bags or only mix half. And second, since its foam, the board is super easy to cut with just a utility knife. This liquid waterproofing solution does more than keep water away, it also promotes tile adhesion and prevents cracking. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Kerdi on shower curbs - JLC-Online Forums Waterproofing is an important aspect of any bathroom or wet-area installation. The surface of Wedi is perfect for bonding. WATCH HERE: https://www.youtube.com/watch?v=3TRLd2HYhbU&list=PLO47JMsdYGrkxM_ZkOc3lMnsVhTqj80bB#justdoityourself #lovingit #p. Kerdi can even be installed over drywall. It is easier to cut than cement board, it is mold resistant, and it has a built-in moisture barrier. All it takes is the right preparation. Everyone knows brick and stucco, but what about fiber cement and metal? Project Type: Tile / Category: Bathroom. It is lightweight and made of expanded polystyrene. link to How To Organize A Bathroom Closet. Using Kolmogorov complexity to measure difficulty of problems? Kerdi Board panels have a number of other advantages: they can be cut to size using an ordinary utility knife, can be glued or screwed into place, and are very lightweight. Once all areas have been properly waterproofed, the walls can be tiled and grouted to create a waterproof surface. Let the mortar dry for 24 hours then test the shower. 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. 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. The curb doesn't have to be any wider than a 2x4. I think the first one I used was cheap and that was part of the problem. And second, since it's foam, the board is super easy to cut with just a utility knife. How do you show the depth of a hole in a drawing? The best answers are voted up and rise to the top, Not the answer you're looking for? if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[728,90],'remodelormove_com-box-3','ezslot_2',173,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-box-3-0');Yes, you can put Kerdi membrane over cement board. GoBoard Vs. Kerdi For Your Shower: In-depth Comparison Kerdi-Board is an extruded polystyrene foam panel, with reinforcing material on both sides, covered by fleece webbing for effective anchoring of thin-set mortar. It installs with screws, then you tape the joints & screw holes and install your tile. The waterproof membrane isn't a substitute for the substrate. To create a watertight shower assembly, we installed Schluter's Kerdi membrane over the drywall, just as we would for tile.Write by:. This will prevent water from entering from behind the membrane, and will provide a more secure waterproof layer. Required fields are marked *. (3ft-3in wide)Or will the Kerdi membrane (with seams taped with kerdi band) prevent each board from moving . Can you remove tile from Kerdi membrane? Kerdi Board as a whole is much easier to install than Cement Board. One thing I do like fibercement (Hardie) for is when I need thin strips of cement board. A mortar wall is better and can be customized easier. It may take more than 1 beer:). Cement board is a heavy mess compared to drywall, and drywall is a heavy mess compared to Kerdi Board. link to What Kind Of Paint For Garage Walls? The problem is on the back side of the drywall, which is not protected. Greenboard is the same as regular drywall. Waterproofing cement board is relatively simple and there are several different waterproofing products available. Cement board sucks up the moisture and as a result, the kerdi doesn't always stick as well to cement board. #4 You could be adding a good 1000 pounds to your install too. 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. Kerdi really offers very little advantage over hardiboard plus membrane. Manufactured by Schluter Systems, Kerdi Board is a multifunctional tile underlayment and construction panel, that can also be implemented for forming bonded waterproof assemblies with tile coverings. Additionally, all seams should be sealed with Kerdi Fix and covered with fleece. Here is a video off the Schluter-Kerdi website that describes how to apply the waterproof membrane on top of the substrate (gypsum board in this case): http://www.schluter.com/schluter-us/en_US/Shower-System/KERDI-SHOWER-KIT/Schluter%C2%AE-KERDI-SHOWER-KIT/p/KERDI_SHOWER-KIT. For the floor I make a dry mix mud base and then the Kerdi membrane. And by 'booking the Kerdi' I mean we put it in the bathtub, sprayed it with the handshower, then booked it (just like wallpaper). Gettin' a little delirious. 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. Keep in mind that most tile setters err on the side of caution and brush a waterproofing membrane on top of cement board when it is in wet areas like showers or tub surrounds. That was not a fault of the Kerdi, or the installation. Kerdi Membrane Over Greenboard (Is It Recommended?) 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. ), Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended. My understanding is that Schluter-Kerdi, being a sheet topical membrane, recommends just going with regular drywall instead of cement board but you can certainly use cement board as the substrate. Asking for help, clarification, or responding to other answers. x 96 in. It's not a matter of trusting the Kerdi. Ceramic Tile Advice Forums - John Bridge Ceramic Tile, http://www.youtube.com/watch?v=G4HjHT6_cUo, http://www.youtube.com/watch?v=wEt6irjJCI0, My master suite addition & full bath to 1/2 bath renovation. When installing KERDI with . Ditra is a 1/8-inch thick polyethylene membrane with a layer of anchoring fleece on the underside and a grid of square cavities on top. What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? that's home depot homeowner installation method. It is a fast process that is hard to mess up if you do it right. Following these steps will help ensure that your shower space is properly sealed, and thus that the cement board is well protected from moisture. Look at it this way; Withe Kerdi, you either trust it or you don't. Finally, it is important to remember that any thin-set that has been exposed to moisture must be replaced.