On a vertical surface, very little moisture . Kerdi can even be installed over drywall. Jessica considers herself a home improvement and design enthusiast. Overall, putting Kerdi over regular drywall can be done, with the proper steps in place to properly install the membrane and its components. Depending on your project and the specific cement board you are using, you will want to select a thinset appropriate for both.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[468,60],'remodelormove_com-large-leaderboard-2','ezslot_15',158,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-large-leaderboard-2-0'); The two primary criteria to help guide your selection are the type of cement board you are using and whether you are installing it indoors or outdoors. 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. The benefit of using kerdi is we can lay it over drywall, We've added a "Necessary cookies only" option to the cookie consent popup. Your air bubbles will travel along the valleys you've made, and it's way better if you only have to move them 20 inches to the nearest edge rather than all the way from the ceiling to the floor [Again, Mongo can, but he has mad skills].-Not paying attention to the principle of bedding top down, center out. Why does the plumbing rough need to be moved? And second, since it's foam, the board is super easy to cut with just a utility knife. No, that doesn't sound right. Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? Here are the fundamentals of tile installation over cement board. Go with smaller bags or only mix half. You can apply it on PVC, metal, slabs, walls, and floors. But you might be struggling to figure out what kind of paint to use on garage walls. This thread is 9 years old and it's the Hardi board that's thirsty not the Kerdi. Good luck with your project. Yes, KERDI membrane will stick to cement board. Cement board is a heavy mess compared to drywall, and drywall is a heavy mess compared to Kerdi Board. All shower/tub areas should have concrete board (I prefer hardiboard). Properly waterproofed Hardie board should last for many years. 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.' 120 sq feet including the floor. Also, apply the acrylic mastic between the Create curved designs around pipes or columns using the vertically-grooved KERDI-BOARD-V, or use L-shaped KERDI-BOARD-E panels to enclose similar. The foam core surrounded by synthetic cloth on both sides and adhered with resin glue is. The completed assembly takes the place of more traditional backer board when installed over 3/4-inch wood subfloors. Both may be effective substrates, but Kerdi Board boasts significant advantages. if you go with vapour barrier, then cement board. The great thing about Kerdi Board is that it is lightweight and easier to maneuver. Step 4: Place the Tile. Kerdi is not a user friendly product, and when you shrink your working time down it is downright stressful. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. I can take a bit of it off the wall and roll it into a ball. Moisture resistant can cause similar problems, and there is absolutely no advantage to it. Learn more about Stack Overflow the company, and our products. Fixing that is not that easy though. I still wet the walls first. If you are good with a trowel and understand how to set up and use screeds as a guide for leveling or forming the mortar, pouring a traditional mortar bed may be a good alternative to tile backer board, especially on uneven or sloping floors. rev2023.3.3.43278. 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. So long as the seams and joint areas are properly prepared, the panels can also provide waterproofing. Any competent tile contractor would float the wall in mortar giving you a stronger, level, perfectly flat, and square surface to properly install tile. I hang Kerdi on cement board and fibercement board all the time. The manual can be found here: http://floorelf.com/waterproof, I would say unless you are experienced in working with Schluter-Kerdi waterproofing membrane kit, then I would say work with an easier waterproofing approach, either liquid waterproofing or a combination of liquid and traditional waterproofing (plastic covering the wood frame). The Ditra uncoupling design is lightweight, durable, and minimizes the possibility of cracked tile and grout. . On top of that, fiber cement board is even more brittle than standard cement board, so you have to be extra careful to keep screws at least an inch from the edge to avoid breaking the board. The difference between the phonemes /p/ and /b/ in Japanese. Also - use a good thinset. A place where magic is studied and practiced? Continuing Education for Architects & Designers. How do I align things in the following tabular environment? 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. ;). You are wise to use a cement board. KERDI was developed as a waterproofing membrane to be used in . The cement board core itself is not waterproof, but it can withstand water without falling apart. 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 the industry standard when it comes to tile substrates and the most preferred among professionals when installing porcelain or ceramic tile. (3ft-3in wide). As fiber cement board is similar to regular cement board, it makes sense to choose the one that is cheaper or more readily available. True cement board (Durck, Wonderboard) is my first choice as a tile or Kerdi backer. To prevent those movements from transferring to the tile floor, consider installing an uncoupling membrane between the concrete and tile surfaces. Cement board is particularly vulnerable to water damage, so waterproofing can help protect it and help it last longer. Foam-core tile backing board has two big advantages over other backer boards. Kerdi board is a kind of waterproofer because these kinds of boards are made of XPS foam. The shower is ready for tile. While cement board may be the most common and widely-known tile substrate, Kerdi Board is giving it a run for its money. 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. Additionally, you can use KERDI-BAND around corners, seams, and joints to help with a waterproof installation. vegan) just to try it, does this inconvenience the caterers and staff? BTW the older Kerdi thread referencedwas excellent. They are square. The surface of Wedi is perfect for bonding. Rolling pin, good, now I can throw away my magnesium float.LOLCasey. To create a watertight shower assembly, we installed Schluter's Kerdi membrane over the drywall, just as we would for tile.Write by:. builder, anti-builder, rebuilder -- Retired Moderator. You still use metal lath, but then mix bags of powder and pour the soupy mix onto the floor. KERDI features a modified polyethylene (PEVA) core with non-woven polypropylene on both sides to anchor the membrane in the thin-set mortar. Caulk the gap. Various products can be used to waterproof shower walls such as water-resistant drywall and cement backer boards. Because it can let some moisture wick through it, you have two choices: put a moisture barrier behind it to protect the structure, or, waterproof the front of it. the cost of the tile job. Cementboard sufficient to a tub surround is dirt cheap .vs. 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. Backerboard plus a waterproofing membrane like Redgard is all that is needed for tub surrounds with thinset then tile. Additionally, seal the space around any pipes and fixtures that can be found in the shower. The cement board can also become weakened and start to flake away when it absorbs moisture, causing ugly spots and patches to start appearing on the wall. #2. The shower tray eliminates the need for a mortar bed. When it comes to installation, a Schlter system is typically easier to install than a cement board, and it also allows for more design freedom as it does not require a traditional waterproof layer. Hang the cement boar. Slap it up comb it out, leave every ridge tall and perfect. Press the Kerdi Membrane into the Thinset Mortar with firm, even pressure to achieve full mortar coverage. Like cement board, the boards are heavy and hard to cut. I look at ceramic tile as a lifetime-of the house-product, so I use the best material for the job.I prefer to use cement board as the substrate with the Kerdi on top. Modified thin-set mortars must dry for the polymers to coalesce and form a hard . The cement board needs to be clean, free of debris, and dry. All shower/tub areas should have concrete board (I prefer hardiboard). An additional layer of sealant can also be applied on the seams for extra protection and water resistance. 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. Yes, Schluter membranes can go over cement board. Kerdi membrane prevents water damage and mold development. WATCH HERE: https://www.youtube.com/watch?v=3TRLd2HYhbU&list=PLO47JMsdYGrkxM_ZkOc3lMnsVhTqj80bB#justdoityourself #lovingit #p. If I go the kerdi membrane route, do I still need to tape the joints before installing the kerdi membrane . x 60 in. 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. We installed cement board on the walls, and today when we attempted to apply the Kerdi membrane we could not get it to adhere. Sure, you can do it.just be sure to "spritz" or wet the hardi thoroughly before.it's pretty "thirsty.". Think about movement. Waterproofing cement board is relatively simple and there are several different waterproofing products available. Why do you think each board should be able to move at all let alone independently? Schluter says that the Kerdi membrane and tile can be installed over standard gypsum wall board without any problems. 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. I think I'll try using the thinned mixture of Redgard and then try the Kerdi membrane again. 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. 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. Yes, you should prime drywall before installing KERDI in order to ensure proper adhesion and a successful installation. Schluter-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. It is designed to form a waterproof layer between cement board and tiles, helping create a watertight installation. 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. Their lighter weight makes moving panels around during installation a cinch, which is a far cry from the heft of conventional cement board. In . But I did want to understand the cost breakdown as the walls then become WAY more expensive than it would be with Redguard. We are DIYers who have already remodeled one bathroom successfully, but this is our first time using The Schluter shower system. If you ensure that silicone goes in and that the thin-set and grout do not bind there you should be good to go. Needed to interject a little "amateur humor. 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. They are available in thicknesses of 3/16, 3/8, 1/2, 3/4, 1, 1-1/2, and 2 (5, 9, 12.5, 19, 25, 38, and 50 mm). There are many different types of underlayment to choose from, but they all serve the same purpose. Step 1: Measure the area. Additionally, the drywall should be primed with a latex primer before applying the Kerdi membrane. Furthermore, if you're working in an older home KERDI-BOARD fits better than cement board in odd spaces. 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.
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