For complete installation guidelines and warranty criteria for KERDI in showers, steam showers, and bathtub surrounds or KERDI-DS in steam rooms , please download the Schluter- Systems Shower System Installation Handbook and view the installation videos available below. Some of our partners may process your data as a part of their legitimate business interest without asking for consent. Therefore, if you are yet to buy cement board for your shower walls, its advisable to weigh the pros and cons of the Kerdi board. Then drill a single screw through the washer/KERDI-BOARD and into the stud. No matter how small it is, if you leave it exposed, there is a considerable chance that water will seep through it and may damage the underlying materials. D Kerdi-Board-SN Shower Niche. Can I install new kerdi band overtop of that or do I have to remove the old fleece and thinset layer first? i would just redgard anything that left me in doubt; money well spent. Passing negative parameters to a wolframscript. NzYyYzgyNjRiYjZmODY4OTEyMTdhMWVhMGViMTJjNWM0Mzg0NzY4ZjI3M2Jk In my. (Laying tile for a bat. At the beginning of this article, I mentioned that the preferred shower setup would be the Kerdi shower pan with Kerdi board walls. 3050 W Ball Rd #44, Anaheim, CA 92804 | MLS# OC23029343 | Redfin Upon measuring the floor level for my shower threshold for my curbless shower, I realized the threshold was not level. ZjNiYzE5ZTk4MWJhZDIyMjIxODJiY2EyZjhkYjRhYTFlNTgxNTgzZTU0YTA3 Cortona by Jetcoat shower wall systems features encaustic tile-look shower walls to create a bold statement in your bathroom. Ubuntu won't accept my choice of password. Waterproofing, or Tiling techniques, or Bathroom remod's. etc. If I install overtop without removing, I would also add a bead of kerdi-fix along the new kerdi-band edge just to be sure. The joint should be around inches. The pan membrane goes over the preslope, not under it. Specifically, it focused on how to install a moi. Yes. This is your resource. Using Kerdi Shower Pan With Cement Board Walls (Is It Feasible?) Now that you know a Kerdi shower pan can be installed alongside cement board walls, its time to get into the nitty-gritty. Installing a Kerdi shower pan with cement board walls, Importance of using the entire Schluter system. Should I use Kerdi membrane or cement backerboard? Are the two incompatible for some reason? I would like to use Kerdi board on the walls, but not the floor. In general, unmodified thin-set mortar is a blend of Portland cement, sand, and water retention agents that is mixed with How far up the wall do I need to install the Schluter-KERDI? Install a new mud pan in the void to relevel that portion of the shower pan and threshold (sloped to drain). You tile on top of that. YTUzMWViNWRlZmY1YjNiMjc2ODZkZDMzMTUwNTYyZjJiYTQzOWRhOTQ5NjE3 The Kerdi shower pan is installed by cutting it to fit the dimensions of the shower and attaching it to the subfloor using thin-set mortar. The kerdi membrane will also extend 4" up the north wall and 4" up the west wall. OK - I thought I knew this - that's why I answered Obviously - I was wrong. We are using a kerdi shower pan with a dry pack mortar extension, of course covered and finished with kerdi membrane as well. Generally, Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar is used. Again - do yourself a favor - and go get some books. This also keeps your bathroom renovation costs low. Thanks everyone for your help! Everything You Need to Know. It is appreciated and I feel like I have a much better understanding, so thanks again. Can be installed in both Schluter-Kerdi and Schluter-Kerdi-Board wall assemblies. Cement Backer Board (CBU) "Wicking" in Tile and Marble Showers | Tile We and our partners use cookies to Store and/or access information on a device. Repeat this process until the entire board is installed on the framing. MThhODM4ZmY0YjcyOTViZmEyZDQwNjM3YTc0MjUzNTU3N2JmY2YzNjkzYjM3 Then follow the instructions to install the Kerdi pan, using the Kerdi band material and thinset to seal it to the waterproof walls. Important to overlap seams in a shingle method. I learn and write about things happening with us and used by us every day. And what adhesive as well. there's a dwang, then then the membrane then the kerdi so putting mortar against the Kerdi just pushes it against the structure behind it, so no problem, for the corners use the Oatey corners because they need to seal to the Oatey membrane. But if I want to Kerdi the walls first and then have the floor membrane lap over the wall membrane, I'll do that too. MjJjZTMwMDMzMDMwNTg5ODQwMDIwZmE0MGUyYzdjOTFlZjQyMTBlZmVjODUx Are these baths large enough for curbless showers. Should I use liquid water proofing membrane over a standard shower mud pan? Please call Schluter-Systems Can I install Schluter-KERDI over drywall in my tiled shower? Schluter-Systems requires the use of Schluter SET , ALL-SET , FAST-SET, or an unmodified thin-set mortar meeting Can I use a premixed thin-set mortar to install Schluter-KERDI and tile in my shower? Kit includes: 8 - 1/2-in X 48-in X 38-in Kerdi-Board panels, 2 pipe seals, 1 mixing valve seal, 1 . One of the obstacles most DIY folk usually encounter when building such a shower setup is determining which of these two should come first. Once the shower pan is in place, the next step is to install the Kerdi membrane and bands on the walls. These three alternatives have additional features, such as better water resistance, competitive pricing, and ease of installation. Generated by Wordfence at Tue, 2 May 2023 7:14:58 GMT.Your computer's time: document.write(new Date().toUTCString());. Kerdi-Shower-TS is a prefabricated sloped shower tray with integrated Kerdi waterproofing. In most bathrooms, you will likely find cement board walls. Tray dimensions are: 38 in. Kerdi Shower Pan With Cement Board Walls at Chris Nichols Blog If was competing for fixed price jobs, I'd consider it. 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? NmI3OTU0NTYyZDMzNjQ0ZTQyODJkNjQyOTI2ZTg3Mjg4ODVhYzMyNzI1YWFm 8. Vinyl Siding Not Lining Up (Causes, Solutions & Misalignment Prevention Tips), Board And Batten Over Stucco (A Comprehensive Installation Guide). Mzk5NmJlNmIzYzliYjlhNWVmZTc1ZWQ1YmY5NDJhODA3OWU2NmM0ZmQ2NDZj 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. Install new kerdi membrane overtop of that mudpan area, overlapping 2" east onto the existing kerdi shower pan. #4 You could be adding a good 1000 pounds to your install too. That is, it will allow water or moisture to pass through. Panel dimensions are 1/2 in. Install a kerdi-corner as well, over the membrane. 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). For a better experience, please enable JavaScript in your browser before proceeding. #1 - Backer board has nothing to do with HD or any other big box. 2 Baths. I was the first person to use Kerdi in my area and I had to educate the inspectors, show them the certificates from Schluter, etc. Can I install Kerdi board just on the walls of my shower and use a PVC membrane on the floor? DIYers on this forum seem to have nothing but problems with Hardi. That would obviously be a problem for shower glass. Create a fully waterproof and vapor-tight enclosure for tiled bathtub and acrylic shower base surrounds. Schluter Systems Kerdi Shower Kit: 48x72 Center Shower Pan (Tray), 2 inch PVC flange and 4 Inch Shower Drain Cover in Classic Design with Oil-Rubber Bronze Finish (KD4GRKEOB Grate) . Schluter-Systems does not recommend the use of premixed thin-set mortars (mastics/adhesives) in any KERDI installation. 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. The consent submitted will only be used for data processing originating from this website. Kerdi-Board panels are applied directly to stud framing Eliminates need for cement board or gypsum wall backer Quick and easy to install Kit includes: 8-1/2 in. The Schluter-KERDI-SHOWER-KIT contains all of the waterproofing components, including the shower tray and shower curb, required to create a maintenance-free, watertight shower assembly without a mortar bed. The Kerdi shower pan is a popular choice for creating a waterproof shower base, and when paired with cement board walls, it can provide a durable and reliable watertight enclosure. But because cement board walls are also an ideal option, its only fair that I share with you a comparison of these two wall materials and their performance. 2. Im installing Schluter-KERDI over drywall in my shower. Total shower area is 60x30. Do the prefab Schluter niches like the double unit 12 by 28shelf have a built in pitch to the bottom and middle shelves to drainoff water as shown in niche that you built in that thread? Kerdi-Shower 38 in. x 60 in. Off-Center Shower Tray - The Home Depot Gutting a bathroom? The walls are cement board and I purchased a few gallons of Redguard for waterproofing them. Choosing the right lawn mower can make this task much easier and more efficient. Small size, about that of a quarter. You really should just use kerdi membrane over everything in this case. I used to "trust" the Kerdi and drywall until I had a shower that the valve broke inside the wall cavity four years after being put in. 304 STAINLESS SHOWER DRAIN: Premium anti-rust . Send us an email: , construction-most-common-waterproofing-mistakes, Using a Prefabricated Shower Tray and Ramp, SchluterKERDI was evaluated by ICC-ES - ESR-2467, Schluter-DITRA was evaluated by ICC-ES - ESR-2467, Schluter-KERDI is listed by ICC-ES - PMG-1204, Schluter-KERDI-DS is listed by ICC-ES - PMG-1204, Schluter-KERDI-DRAIN is listed by ICC-ES - PMG-1204, Schluter Systems holds a Los Angeles Research Report (LARR) for Kerdi - File M-100022, Schluter Systems holds a Los Angeles Research Report (LARR) for Kerdi-Drain - File M-100023, Sheet-appliedpolyethylene waterproofing membrane and vapor retarder, Eliminates water damage which can lead to mold and mildew, Features a modified polyethylene (PEVA) core with non-woven polypropyleneon both sides, Features an anchoring fleece on both sides to anchor the membrane in thin-set mortar, Ideal for waterproofing in conjunction with tiled surfaces on walls and floors, KERDI is 8-mil-thick and guarantees uniform thickness, The 6 7 (2-meter) wide roll covers wall area from floor to standard shower head height for fewer seams and a faster installation. 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. It's a completely different animal. It has an expoxy surface, over a fiberglass composition core 3. Blocks made from slag concrete have a long service life and high thermal insulation properties, just like bricks. As for the Kerdi, go to the following link. Press KERDI fully into the bond coat. Some being easier to work with than others. The Schluter-Shower System is an integrated family of products that together form a fully bonded, watertight assembly for tiled showers Do I install the Schluter-KERDI-BOARD-SC shower curb or Schluter-KERDI-BOARD-SB shower bench on top of or adjacent to the Schluter-KERDI-SHOWER- T/-TS/-TT shower trays? Will use the Schluter Shower system. Deep recessed medicine cabinet manufacturers? Cinder Block Houses | Learn Everything At One Place - REthority You are wise to use a cement board. YmE3MzkzMTAwZjg2NTdjNmQ1YjU3ZTcwZGNmMWE2Nzg0ODU4OTc2ZGQ4ZjIz 2. I just pass along the cost of the Kerdi to the customer and everything is fast and everyone is happy. Placing the cement boards edge on this lip will enable water to swiftly run down into the pan. Assumption is that the mprtar bed for final slope will also apply pressure to the lower inch or so of kerdi? OTY4NTcwNWUzNjdiNjViYTBhYTQ4OWQ0NTljMDg1YWM0MGQyZTEzMmVmOWRk Kerdi Board, Duroc, Wedi board, Goboard: Pros and Cons First Kerdi can be installed on drywall or cement board. It is an advanced tile setting book intended for people who want to build their own Kerdi shower. KERDI-DRAIN grate and flange must be ordered separately. How to subdivide triangles into four triangles with Geometry Nodes? Point drain with integrated bonding flange, Complete bathtub and shower base surround kit, Bonded waterproofing and vapor-retardant membrane, Contact us: 888-472-4588 Will be replacing tub shower combination with tiled shower in my home. Ft. 8681 Katella Ave #921, Stanton, CA 90680. That makes sense the installation video from Oatey says "wateproof drywall or cement board" but your kerdi board is waterproof too, so it's equivalent. You probably have to go to a big box store's special order desk or find a specialty tile supplier to find it. NTZjYmQ3MmYwZTUyY2Y3NDY2ZDQ1MjNjZTZjMGExNThhYzQ0MWM2ZjM2NzJk It shouldnt be too big, nor should the cement board sit flush with the Kerdi shower pan lip. The only problem with the cement board is that its not waterproof. In this hybrid configuration what ddo I install in lieue of corner dams on my curb? If using RedGard or something like that, you better call Schluter tech support because the fleece on the Kerdi and the thinset work together in a certain way to block water. There is definitely skill & planning required to doit right. MzAxN2U3MGQ5ODhkMDA4OWJlNDg5YTk1Y2JlMjhhYjRiMjZjMTk3ZWZhN2Ey However, the answer you provided above suggests that the OP could omit a waterproof membrane, that I. Schluter-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. A toilet that is not flush with the floor can be both annoying and potentially damaging. Is the Back of Kerdi Board the same as the front? How to Install KERDI-BOARD on the Main Wall Here's where the fun begins. Schluter Kerdi membrane is a flexible, sheet applied waterproofing and vapor-retarder membrane that is typically applied to shower walls, bathtub surrounds, and other tile applications where moisture will be present. Using Kerdi Schlueter membrane with cement board. Proper waterproofing is essential in a shower because it prevents water from penetrating the walls and floor and causing damage. Is this overkill? Do I need to start over or can I simply repair the hole? The pan should be positioned so that it slopes slightly towards the drain, and the edges should be sealed with this set to create a watertight seal. . The following steps outline the process for installing a Kerdi shower pan and accompanying membrane and bands on cement board walls: It is important to use the entire Schluter system for proper waterproofing because each component of the system is designed to work together to create a watertight seal. Take your time and pay attention to detail. Period. Fast Delivery . It works well, is what Schluter recommends and I've never had an issue with it. How to adhere edge of bullnose tile to drywall as trim for shower/tub surround. To allow for greater movement, the center section of the KERDI-FLEX can be tucked into the cavity of the expansion joint prior to bonding. If any leaks are found, they should be repaired before using the shower. So pick the system you like and use that for the walls, pan/base and drain. Why is My Bathroom Sink Leaking At Wall Connection? 4.6 . ZTliNDEzYTU0MjEzYjEzM2M5NzI4MGJjNmFlZjhkZjdlZWY4NDUzMmUzMDZk Install new kerdi-band along the floor seam where the shower pan meets the ditra. Another advantage of the Kerdi system is its durability. PLEASE do yourself a major favor, and spend $40 on a couple of books found at your local Hardware Store Waterproofing, or Tiling techniques, or Bathroom remod's. If you are a DIY enthusiast with some slight experience with shower pans and cement boards, this should be an easy project for you. Hello, I just joined this forum. No, the KERDI membrane does not have a front/back to it. KERDI-BOARD allows you to quickly and easily build tile-ready elements in showers, bathtub surrounds and platforms, countertops, vanities, shelving, and more! The rubber/waterproof layer remains intact on the walls. NWE0MGVjYjA5YTY0M2NlM2FkNzdlNWFhODg3ZWJlYTU4ZGI1MDQ5ZmZkYTc3 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. It looks to me from his diagram that there's a joist right in the center of the 38" wall. Using the entire system together ensures a properly sealed and protected shower that will remain watertight for years to come. Follow up question. All of these products are put up and put on - AFTER the shower base pan is installed. All you need are the right set of materials and some proper guidance. Here's a Kerdi thread I did a while ago that shows varying lapping techniques. However if installed on drywall it is only protecting one side. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Y2M1NDYzZjc3N2NjYzI3ZmU2MTE0OGEyYjQwNjQyNGIzMDI1YTdmZmMyMzBl Toe-screw 24 blocks to the subfloor every 12 inches and 1/2 inch away from the line to allow for the thickness of the hardboard siding. There is a product called Kerdiboard you might want to look into. Read up on Kerdi. This creates a continuous waterproof barrier that prevents water from penetrating the walls or the shower pan. The Schluter Kerdi drain pan will work with the cement board walls. NTliZjRkNWNhZTkzY2ZjN2IzZjVjN2JhYTU5OWNiZDg0ZWY4OGNjMzlhYjM3 No thinset on Durock cement board for shower wall? The shower base pan has a 'lip' at the sides. Image of minimal degree representation of quasisimple group unique up to conjugacy. Connect and share knowledge within a single location that is structured and easy to search. Cementboard sufficient to a tub surround is dirt cheap .vs. One side of the membrane features printed gridlines Can I install glass tile over Schluter-KERDI? The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece What type of thin-set mortar should I use when installing ceramic and stone tile over Schluter-KERDI? These four materials will provide a seamless and waterproof transition between cement board walls and a Kerdi shower pan. For acid-resistant coverings, use an epoxy adhesive to set and grout the tile. The KERDI-SHOWER-TT prefabricated sloped shower trays eliminate the need for a mortar bed which ultimately reduces the weight and installation time. Same principle here in showers. Schluter KERDI-Board-SN: Shower Niche (with Shelf) 12"x28" (Two Pack) . A cement board is an ideal type of material to use in shower walls with a Kerdi pan. They are also ideal tile underlayments, and you can get them in multiple sizes. Passing negative parameters to a wolframscript. Apply thin-set mortar to the substrate using a 1/4" x 3/16" (6 x 5 mm) V-notched trowel or the KERDI-TROWEL, which features a 1/8" x 1/8" (3 x 3 mm) square-notched design (Note the open time of the mortar). Installing Concrete Backer Board with an Acrylic Shower Pan You absolutely need to include some sort of substrate (cement board, green board, regular drywall) with the Schluter-Kerdi waterproofing kit. You could use Georgia Pacific's "DensShield" (which I guess is a 'type' of drywall - so I am contradicting myself) DensShield is specifically meant for shower enclosures, and tiling over. Even the tiling subs have moved away from mortar walls because of the labor cost and lack of craftsmen in the industry. Why Does Air Conditioner Drain Make Noise in Sink? I was worried about perforation of the membrane so inwill keep the kerdi fasteners above the 6 inches of membrane. Schluter Kerdi 3 ft. 3-inch x 16 ft. 5-inch Waterproofing Membrane (54 YjNiMDg0MzJlMTllMDI5YTQ3ZGUwMWZjZWYzMGViMjFjYzlkOTcxMjIxOGM1 Schluter-KERDI-BOARD is a multifunctional tile substrate and building panel, which can also be used in bonded waterproofing assemblies with tile. Marlite | Durable, Decorative Wall Panels & Systems MzIxMWUwODMxYTkzNmQ3ZjE2YjFiMjJjN2YwNzIzOWJlNDA0NWY2Mzc2Mjc1 Here is a link that might be useful: My credentials. Other trowel-applied covering materials, such as plaster, can also be used. This design allows it to be easily cut and molded to fit the shape of the shower and create a watertight seal. If we had a video livestream of a clock being sent to Mars, what would we see? The membrane is a thin, flexible material that is applied over the cement board walls and adhered to the shower pan using the accompanying bands. Thanks in advance! Yeah, I personally like the Kerdi pans because it makes it so simple to use the integrated drain. A Kerdi membrane will be more compatible with the Kerdi shower pan than other waterproofing products. The kerdi membrane will also extend 4" up the north wall and 4" up the west wall. The transition from redgaurd to the niche will be a potential weakspot and may also lead to a hump that will make tiling hard. 12 in. A cement board isnt the only type of wall you can use with a Kerdi shower pan. YmJjMmQ4Y2JiNTdlNGY3Y2IyNGJiZDIwMGYxODU3MWI0YjYxOWI2NTg1NDNk California Power Companies Propose Fixed-Rate Charge Based on Income: Good or Bad? Please refer to the Schluter-Shower System Installation Handbook How long do I have to wait before I can install tile on the Schluter-KERDI membrane? Carefully grind away any old thinset right up to the hex-tile edges. It only takes a minute to sign up. To create the perfect transition, you should install a fiberglass mesh tape with some thinset. LOL), Here is a link that might be useful: Schluter Kerdi. The niche' intermediate shelf isn't actually attached, to enable specific placement for each unique tiling application. What was wrong with the one in the link I posted? Will those spots interfere with the new membrane bonding? Why should I use the Schluter-Shower System? Regardless, install the drywall first, then install the pan. Properly waterproofing a shower area sharing a living room wall, Can I use cement accelerator to decrease setup time of modified thinset. The substrate must be clean, even, and load bearing. When I Flush My Toilet Water Comes Up In My Shower. Regular Drywall, and 'wet' drywall (Greenboard) are no longer recommended, smart, or code approved for any shower enclosure. Recessing the Shower Floor | Schluter Help! Which goes 1st the drywall or the Schluter shower pan - Houzz It only takes a minute to sign up. x 98 ft. 5 in. That should be the starting point of your cement board walls. @DMoore- OK, I agree that with redguard it would be redundant. YTdlYzYxY2Y5MDc3Y2NmMjQxNmZkZTY5ODcxZmMzZGM4ODRjZjdjYzNmMWZm What positional accuracy (ie, arc seconds) is necessary to view Saturn, Uranus, beyond? The problem is on the back side of the drywall, which is not protected. One of the key benefits of the Kerdi system is that it is designed to work together as a complete waterproofing solution. Redoing your kitchen? Follow the manufacturers recommendations for the best results and to ensure a waterproof seal. MTE2OGZmOTBkYTViYmQyZWEwMTNhNzIxYzlmNWE3ZTVjNDI1YzdhNWEyZDI2 and KERDI-SEAL-MV at the mixing valve. NGE2ODRkN2U4YzMwMjc0MjliODgxMGFkMWUzMjMzMzZiYjA1OGI3YjZmZWMx The membrane is a thin, flexible material that is applied over the cement board walls and adhered to the shower pan using the accompanying bands. When your lucky - you might get Greenboard to last 10yrs. To learn more, see our tips on writing great answers. Calculate all your membrane requirements for your project. You need to do some Reading about showers and baths foundational issues. A leak at the wall connection is a particularly common issue, and it, Your email address will not be published. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. Kerdi Shower, Schluter Kerdi Systems - Mold-free and Watertight | Tile To view the purposes they believe they have legitimate interest for, or to object to this data processing use the vendor list link below. Not even the plumber's fault as it was just a bad valve. It's not a matter of trusting the Kerdi. by Splash Tile. The Kerdi shower pan and membrane are specifically designed to create a watertight seal, preventing water from penetrating the walls and floor and causing damage. Then I'll drypack or Kerdi Tray the floor, put kerdi on the floor, Kerdi the floor-to-wall seams, and tile the floor and fill in the bottom courses of wall tile. Ensure that you get the correct fit and proper drainage slop. Do you install your drywall and then put the pan up against the drywall, or do you put the pan in first and then put the drywall down on top? That way you don't have to walk on the pan when kerdi-ing the walls. You can even install the drywall first, then Kerdi the drywall, THEN install the pan. Test the shower for leaks before using it. Did the drapes in old theatres actually say "ASBESTOS" on them? MTA5M2VkNzZmMGZhMmQwNzU1NzkyMzhiYjI2YTE5NWVmNzFiYzZjZjk1ZmRk Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. Continue with Recommended Cookies. 5. It's that good. How to Build Shower Pans (DIY) | Family Handyman Air bubbles must be avoided. Making statements based on opinion; back them up with references or personal experience. The you can even just use drywall. Backerboard plus a waterproofing membrane like Redgard is all that is needed for tub surrounds with thinset then tile. Traditional System, How to waterproof your shower installation with the Schluter-KERDI-SHOWER-KIT Complete Kit. Watch & Learn About the product 04:12 If you install the cement board walls first, there is a high chance of water running behind the shower pan and damaging the surrounding materials. How do I know if the thin-set mortar is modified or unmodified? Since Schluter makes both products, you can enjoy their warranty on your shower system. Since the existing wall board will be removed, I'd prefer to go a little extra and install a water proof cement board type base so the tile has a solid substrate even if it were to get wet, such as from a plumbing leak, or from infiltration on an exterior wall (as unlikely as that might be). As you decide whether you can use cement board walls with Kerdi shower pans, do not overlook other wallboard materials. Regular drywall - perhaps 1 year. The price is $9.95. Need help liner vs liquid membrane question, United States Kitchen & Bathroom Designers, Rolling Hills Estates Kitchen & Bathroom Remodelers, The Crossings Glass & Shower Door Dealers. Standard FRP. For complete installation guidelines and warranty criteria for shower applications, please download the Schluter-Shower System Installation Handbook and view the installation videos available below. No. Schluter Kerdi 38" x 60" Shower Tray Off-Center Drain Placement 1-1/2" Perimeter Height - - Amazon.com, Because his drain is off center on an axis that schluter doesn't make a pan for.