kerdi membrane over cement board

With Kerdi Board you get to enjoy an effective product that is lightweight, easy to cut, waterproof, and leaves behind no dust! Personally, I like standard drywall. We like that the Kerdi membrane material installs easily over almost any substrate, including standard wallboard. What is a word for the arcane equivalent of a monastery? What changes do you suggest to make Bathroom looks more updated? It could take longer if the space is particularly wet or humid. But a mortar bed does have advantages. On the other hand, a Schlter system offers improved thermal insulation, which can help to reduce heating costs. Though, each product comes with its own individual characteristics, and pros and cons. Asking for help, clarification, or responding to other answers. Ceramic and porcelain tile, more than almost any other surface material, need a stable . It is important to overlap the edge of the membrane so that it covers slightly more than half of the drywall behind it. Once this is done, continue the installation by following the directions for the particular Kerdi product being used. This will help to extend its lifespan and make sure it looks its best for years to come. Modified thin-set mortars must dry for the polymers to coalesce and form a hard . In my. 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. Such membranes typically come in a brush or a roller form and can help create a durable barrier against water infiltration. 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. Can you put KERDI over regular drywall? - remodelormove.com Yes, KERDI membrane will stick to cement board. RedGard On Hardibacker Board. The most important thing to remember when applying the membrane over the cement board is to make sure the surface is clean and free of any debris, dust or other contaminants. Bulk update symbol size units from mm to map units in rule-based symbology. They are absorbed into the surface material and help keep moisture away from the substrate surface. How to install a kerdi membrane over cement backer board - Quora Overall, putting Kerdi over regular drywall can be done, with the proper steps in place to properly install the membrane and its components. This is a very effective and popular method of installing tile, and one that ensures the tile doesnt crack. It also features fleece webbing that allows for effective anchoring into thin-set mortar. 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. While cement board and grout are not waterproof, Kerdi is and can even be directly installed over drywall. I think it is engrained in me to do that so I forget to mention it. My floor tiles are 2" x 2"." - Lisa Jasper No - you can not use Kerdi Board on the floor. This is the traditional tile backer. Wedi vs. Kerdi Waterproof Membranes: Which Is Better? We tried soaking the cement board and applying the kerdi in small sections. This will prevent water from entering from behind the membrane, and will provide a more secure waterproof layer. We just went through a learning curve on the Kerdi and Hardi. We are no longer supporting IE (Internet Explorer), Do not Sell or Share My Personal Information. Required fields are marked *. The cement board needs to be clean, free of debris, and dry. Step 6: Choosing the Next Tile. Jessica considers herself a home improvement and design enthusiast. Problem with very thick cement board/ tile/bullnose edge, Steam Shower Slip Joint Detail - The secret is in the boarding stage. 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. This will ensure that the coating sticks to the cement board. Learn more about Stack Overflow the company, and our products. Schluter Kerdi on regular drywall - GreenBuildingAdvisor Should I use Kerdi membrane or cement backerboard? If your going to do the job do it right, and give professional advice pls. Look at it this way; Withe Kerdi, you either trust it or you don't. When doing so, it is important to ensure that the drywall surface is clean and free of dust, grease, and loose paint. Do new devs get fired if they can't solve a certain bug? And by 'booking the Kerdi' I mean we put it in the bathtub, sprayed it with the handshower, then booked it (just like wallpaper). Step 3: Apply Thinset. 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. If done according to manufacturers instructions, it will seal nicely. 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. Cement board is particularly vulnerable to water damage, so waterproofing can help protect it and help it last longer. If cement board had been used, most likely the damage would have been much less that what I have to deal with now. Shower Install - Cement Board or Schluter? - RedFlagDeals.com Kerdi-Shower-T/-TS/-TT is a prefabricated sloped shower tray with integrated Kerdi waterproofing. Builder saying he doesn't want to put my trim tile in here. No, you do not need to install a vapor barrier, as Kerdi Board is the vapor barrier. It worked well - just like wallpapering. Hardibacker is a VERY "thirsty" material that sucks the moisture out of the mortar VERY quickly and I don't like it. Kerdi 3 ft. 3 in. Why does the plumbing rough need to be moved? When applying the primer, make sure to cover all surfaces thoroughly, as these will be completely covered by the KERDI membrane. Everyone knows brick and stucco, but what about fiber cement and metal? 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. All it takes is the right preparation. A good rule of thumb is 24 hours per inch of thickness, then one more day on top of that to be sure. 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. Step 7: Cut the Tile. Well, DH said he had virtually no time to work with the stuff before it dried out, so he switched from my spritz bottle to a sponge. For the floor, he should've put a mortar bed, then a membrane that goes over the curb, then another mortar bed. Seams and joints should also be waterproofed and caulked to prevent water from seeping through. Why does drywall work in a Kerdi Shower? - Terry Love Plumbing Advice Should I redo this wall to avoid a mold sandwich? It only takes a minute to sign up. ), Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended. One of the major benefits of opting for Kerdi Board over cement board is the ease of installation. 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. How to Install Kerdi Membrane - YouTube 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. Additionally, the use of modified thinset with KERDI could lead to cracks and other issues down the line as the modified thinset can shrink and pull away from the KERDI membrane over time. Cement board is typically used in wet areas, such as bathrooms and areas with a lot of moisture, because it is waterproof and provides a level of protection from water damage and long-term moisture exposure. It's still applied to cement board. Do I have to use Kerdi tape with Ditra membrane? You troweled on thinset combing it out then pressed the Kerdi into place? Once you have selected the right sealer, follow the manufacturers instructions and apply a generous, even coat over the entire surface of the Hardie board. Cement board is the most common and widely-known backer board. It is a topical waterproofing layer that is put over the substrate to keep water from getting to the wood frame and nails. For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. Putting this stuff on walls is difficult and time . I used this to seal a 3 1/2 by 6 1/2 foot shower with 7 foot walls. 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. Additionally, you can use KERDI-BAND around corners, seams, and joints to help with a waterproof installation. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Learn more about Stack Overflow the company, and our products. Connect and share knowledge within a single location that is structured and easy to search. First, it's super lightweight compared with the rest. Kerdi membrane can be used on cement board, drywall, and, as you may have guessed- greenboard. This makes Kerdi Board suitable for a wide variety of interior applications, including kitchen countertops. When screwed to the framing, thin strips of cement board fracture more easily than thin strips of fiber-cement. Hardie board is a cement-based siding product that is water-resistant, but not waterproof. . Cut the Kerdi membrane to size using a utility knife or scissors. ;). #3 This is a DIY site. The Kerdi is essentially replacing the backerboard. 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. Using self-leveling underlayment takes careful prep work. Je peux rejeter les cookies non essentiels en cliquant sur Grer mes prfrences . On the downside, the cement boards are heavy, somewhat difficult to cut and can leave abrasive sandy crumbs that can damage tubs and shower bases if youre not careful. You'll know the RG is dry when it turns reallllly dark bright red as opposed to the pinkish color when applied. 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.' The big issue with cement board is that the thinset will skin over really quickly. Bathroom closets are often catch-alls for anything and everything remotely related to self-care. I'm thirsty. Good luck with your project. This feature makes building the base structure much easier and more cost . Anyone who has done more than 1 shower shouldn't start without knowing that. By: Author Olin Wade (Remodel or Move Stuff). After roughly two days I would fill the corner with silicone. What to use to flatten and prep wall before installing Schluter Kerdi membrane for tiling? Since KERDI is impervious, it does not deprive the mortar of its moisture. You absolutely need to include some sort of substrate (cement board, green board, regular drywall) with the Schluter-Kerdi waterproofing kit. The boards come in three-foot by five-foot and four-foot by eight-foot panels, sized for efficient use in bathrooms. And second, since it's foam, the board is super easy to cut with just a utility knife. Schluter approves their waterproof Kerdi membrane over drywall. You provide the pitch during the tile set. Some being easier to work with than others. Kerdi membrane prevents water damage and mold development. Install an Uncoupling Membrane Between Concrete and Tile. DensShield is one common brand. I still wet the walls first. If you want to go to the extra effort of putting the membrane over drywall, there is no need to use greenboard. The niche' intermediate shelf isn't actually attached, to enable specific placement for each unique tiling application. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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. I want to mount a cast iron bathtub, but not pull down my 1905 plaster and lath. Thanks for contributing an answer to Home Improvement Stack Exchange! 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. bathroom - Kerdi Membrane over cement backerboard - Home Improvement Once the wall is prepped, use a primer that is compatible with the KERDI membrane so that it will properly adhere to the wall. The main issue caused by non-waterproof cement boards is the eventual warping and damage to the tiles, making it difficult and costly to fix without removing all the tile and starting over. Can be cut to size easily using a utility knife. What's the difference between a power rail and a signal line? There's a really great manual (with diagrams) that makes this all easier to understand. Most of the entries in the NAME column of the output from lsof +D /tmp do not begin with /tmp. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? Will be replacing tub shower combination with tiled shower in my home. Finally, use a roller or brush to ensure that the membrane is secure and has no wrinkles or air bubbles. Let's start! Once its cleaned, use caulk to seal all of the seams where the cement board meets the walls. It is lightweight and made of expanded polystyrene. When applying Kerdi membrane to cement board, the edges and seams of the membrane must be lapped, meaning that each layer should overlap the portion underneath it by a minimum of two inches. Kerdi membrane is a waterproofing material that is designed to be used in wet areas such as bathrooms and showers before tiles are installed. 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. Not everyone knows how to do mud and lathe it's so old school plus it wears you out, ive been a setter for 27 yrs and I have yet to go back to one of my showers I installed using perma base or durock, with a liner, i have started using waterproofing such as redguard or aqua-defense. Sloped Shower Tray KST1220/1525 - The Home Depot. Not even the plumber's fault as it was just a bad valve. What are the differences between "paperless drywall" and "cement board"? Finally, make sure to select a thinset that is appropriate for the job, check the manufacturers recommendation, and always follow the instructions on the product label. Recovering from a blunder I made while emailing a professor, Minimising the environmental effects of my dyson brain. Also - use a good thinset. 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. But there are downsides. About an argument in Famine, Affluence and Morality, Acidity of alcohols and basicity of amines. LONDON. I posted a plea for help and Mongo and Bill both gave me good advice. Kerdi Shower Pan and Cement Board Walls - DIY Home Improvement Forum Not to mention, its warrantied by Schluter, giving you the ultimate peace of mind. RedGard can be applied to cement board panels in two ways: Roll it on the wall with a 3/4-inch nap roller or spray it on the wall. It only takes a minute to sign up. Once the primer is completely dry, use a roller or brush to apply a coat of your chosen KERDI membrane adhesive over the entire surface of the wall, overlapping the edges slightly for full coverage. If you are laying tile on floors that are wavy or out of level, self-leveling underlayment is a great solution. Kerdi Board is expensive, but I can justify it because it saves time, and it's a joy to use. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. There are numerous ways to do this. This will ensure a strong bond between the KERDI membrane and the substrate. How can I find out which sectors are used by files on NTFS? Preparing drywall for KERDI membrane requires a few important steps to ensure a successful application. Houzz Pro: One simple solution for contractors and design pros, surfer thanked Avanti Tile & Stone / Stonetech. Will use the Schluter Shower system. Redgard is a similar product. There is a product called Kerdiboard you might want to look into. 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. Following the correct application of Kerdi membrane over cement board will ensure a successful waterproofing installation and lasting results for your tile project. 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. . PROBLEM SOLVED for Tub Flange when Installing Cement Board and Tile. Ratings (91) (5) (91) (3 . 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. The taping knife at a low angle makes an enormous difference, and I'm very grateful for that hint. You can apply it on PVC, metal, slabs, walls, and floors. How to prep a shower for tile with Schluter Kerdi - TwoFeetFirst Allow the primer to dry completely before proceeding with the KERDI installation. Additionally, seal the space around any pipes and fixtures that can be found in the shower. When screwed to the framing, thin strips of cement board fracture more easily than thin strips of fiber-cement. Step 1: Measure the area. Yes, you should prime drywall before installing KERDI in order to ensure proper adhesion and a successful installation. Drywall under Kerdi would have been a better choice. The site is called floorelf.com. I just a few weeks ago put kerdi on top of hardi-board in my shower and it was PAINFUL! You still use metal lath, but then mix bags of powder and pour the soupy mix onto the floor. I don't want to use the Ditra membrane product but rather tiles directly over the cement boards. We tried adding water to the thinset, we tried . Significantly more time and effort is required to ensure a quality bond when using a modified thinset adhesive with KERDI, and for this reason, it is usually not recommended. To prevent those movements from transferring to the tile floor, consider installing an uncoupling membrane between the concrete and tile surfaces. Cement board (cbu) is not waterproof, but is not damaged by being wet. Creative, C'mon over for a beer! I would fear leaks in all corners of this shower. 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. Additionally, the drywall should be primed with a latex primer before applying the Kerdi membrane. All shower/tub areas should have concrete board (I prefer hardiboard). 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 difference between the phonemes /p/ and /b/ in Japanese. Schulter Ditra is manufactured by Schluter Systems and is a 1/8 thick polyethylene uncoupling membrane that is specifically designed for tile installations. I used 1/2 Hardibacker board over the studs and then used the Kerdi membrane over the Hardi. The problem is on the back side of the drywall, which is not protected. The core isnt waterproof, but it can withstand getting wet without falling apart, so even if your waterproofing system leaks, the board will stay intact. The best answers are voted up and rise to the top, Not the answer you're looking for? First, felt paper is stapled to the floor and covered with expanded metal lath. When installation is done properly, Kerdi membrane offers a waterproof barrier that can protect the plywood below from moisture. The gridlines printed on the surface are beneficial for the installation process, also allowing for quick, neat cuts with a utility knife. Best Cement Boards for the Shower - The Spruce Plus, if you use the mold and moisture resistant drywall, it will be extra insurance against mold. @DMoore- OK, I agree that with redguard it would be redundant. Cement board, Wedi board, Kerdi board, Hardibacker, Densshield, Durock, Permabase, or Wonder board . 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. Politique d'Utilisation des Cookies de Houzz. This liquid waterproofing solution does more than keep water away, it also promotes tile adhesion and prevents cracking. Go with smaller bags or only mix half. This allows the cement to properly hydrate, resulting in To ensure the floor is clean, wipe it with a wet sponge. No, that doesn't sound right. (3ft-3in wide)Or will the Kerdi membrane (with seams taped with kerdi band) prevent each board from moving . If a law is new but its interpretation is vague, can the courts directly ask the drafters the intent and official interpretation of their law? 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. This creates a strong, waterproof tile backer that also functions as an uncoupling membrane. What I would be most scared off is the fact that no inside or outside corners appear to have been used. However, if installed on drywall, it only protects one side. An extra layer of thinset is then added to the surface of the cement board to adhere the tiles in place. They can be installed on any type of support and can even be used to create partitions, with no structural support required. 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. 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. But I can't give you a +1 because telling someone to mortar all the walls in a large shower is like telling them to make an ice sculpture. Sealing the tub flange for tile: 3 methods - DIYTileGuy Foam-core tile backing board has two big advantages over other backer boards. On a vertical surface, very little moisture . ".1) is is okay to use kerdi board instead of ditra on the floor? Slap it up comb it out, leave every ridge tall and perfect. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. If youre not careful, the boards can also leave behind abrasive sandy crumbs that can cause damage to your shower base or tub. Cement boards are typically capable of withstanding larger amounts of water, while a Schlter system is designed to hold up well only in dry conditions. x 60 in. Kerdi Membrane Over Greenboard (Is It Recommended?) Schluter Kerdi-Shower-T/-TS/-TT 48 in. If there is no blocking behind the seam, i would just tape prior to installing the membrane, the thinset will fill the seam and embed the mesh. . 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. Properly waterproofed Hardie board should last for many years. Using modified thinset on KERDI can be tricky and in some cases, it can cause issues. I set the Kerdi with my hands, pat it into the thinset with my hands, then go over it with a 4" taping knife held at a low angle to embed the Kerdi in the thinset. Yes, Schluter membranes can go over cement board. Cement board is a heavy mess compared to drywall, and drywall is a heavy mess compared to Kerdi Board. You peeled it off? Make sure the floor is level in the shower. We tried adding water to the thinset, we tried using a larger notch trowel, but nothing seems to make the Kerdi stick. Kerdi Board Vs. Cement Board (What's The Difference?) - Home Mindset Been clankin' away at this computer for a couple of hours now, guys. Is it ok to fasten a shower surround to Schluter Kerdi curb? Calculating probabilities from d6 dice pool (Degenesis rules for botches and triggers). Cementboard sufficient to a tub surround is dirt cheap .vs.

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