Cut the Kerdi membrane to size using a utility knife or scissors. Schluter Kerdi-Shower-T/-TS/-TT 48 in. If you ensure that silicone goes in and that the thin-set and grout do not bind there you should be good to go. If you can paint a wall, you can use RedGard. I'm guessing he put a 2x6 across for the curb? It is important to overlap the edge of the membrane so that it covers slightly more than half of the drywall behind it. 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. ), Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended. Tile Shower SurroundCement Backerboard Location? BTW the older Kerdi thread referencedwas excellent. Euler: A baby on his lap, a cat on his back thats how he wrote his immortal works (origin? Whether or not you need a Kerdi membrane is a factor of use. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'remodelormove_com-narrow-sky-1','ezslot_27',168,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-narrow-sky-1-0');if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'remodelormove_com-narrow-sky-1','ezslot_28',168,'0','1'])};__ez_fad_position('div-gpt-ad-remodelormove_com-narrow-sky-1-0_1');.narrow-sky-1-multi-168{border:none!important;display:block!important;float:none!important;line-height:0;margin-bottom:15px!important;margin-left:auto!important;margin-right:auto!important;margin-top:15px!important;max-width:100%!important;min-height:250px;min-width:250px;padding:0;text-align:center!important}Waterproofing should also be done on other areas in the shower as well such as the corners, window sills and other areas where water can easily accumulate. 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. Will be doing a bathroom gut and will be laying durock cement board over plywood sub floor. If any is found, wait a few more hours and then re-inspect. 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. By: Author Olin Wade (Remodel or Move Stuff). ps, now that you don't need it anymore you can throw that useless cheap piece of crap magnesium float my way. Kerdi really offers very little advantage over hardiboard plus membrane. The kerdi membrane will probably do the same, and its regularly installed over drywall which is probably less stable. How should I transition between cement board floor and alcove tub? How "tidy" does the kerdi band need to be? A place where magic is studied and practiced? The boards come in three-foot by five-foot and four-foot by eight-foot panels, sized for efficient use in bathrooms. Thinset with a latex acrylic modifier is best for interior projects, but if youre installing outdoors, you should use thinset with a polymer modified (PM) compound for greater moisture resistance. builder, anti-builder, rebuilder -- Retired Moderator. The perfect fold is tricky and many of my first steam showers where built without the sealed slip joint. 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. 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. It is easier to cut than cement board, it is mold resistant, and it has a built-in moisture barrier. Waterproofing is an important aspect of any bathroom or wet-area installation. Cement board is a good, reliable backer board that works well on both floors and walls. 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. Firstly, it is important to ensure the wall is adequately prepared and that it is smooth, flat and free of defects. I used this to seal a 3 1/2 by 6 1/2 foot shower with 7 foot walls. The big issue with cement board is that the thinset will skin over really quickly. RedGard can be used on a wide range of interior and exterior surfaces. 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. Drywall under Kerdi would have been a better choice. . 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. Why does the plumbing rough need to be moved? Aquadefense is approved by IAPMO for use as a shower pan liner, but be sure to check your local building codes, as some areas of the country still require the PVC liner. 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. We tried soaking the cement board and applying the kerdi in small sections. It doesn't matter but you absolutely need to use both a substrate and a waterproofing membrane. This allows the cement to properly hydrate, resulting in To ensure the floor is clean, wipe it with a wet sponge. You are wise to use a cement board. 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. I have to redo my tub surround due to moisture leaks and failing grout. I just a few weeks ago put kerdi on top of hardi-board in my shower and it was PAINFUL! 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? Finally, it is important to remember that any thin-set that has been exposed to moisture must be replaced. The Kerdi is essentially replacing the backerboard. Additionally, all thin-set should be allowed to cure for 24 hours before tiles are installed. RedGard On Hardibacker Board. 173 upvotes. Most cement-based thin-set mortars are suitable; however, it is important to check the manufacturers instructions to ensure that the product is approved for use with Schluter systems. #2 - Your suggestion has plenty of merit though. Then cement, sand and water are mixed together to a crumbly consistency and floated over the lath to form a flat surface. Kerdi Board is suitable for a number of interior applications. We mixed the thinset, it wasn't as smooth as the utube video, but it was close, and we gave it ten minutes. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. x 48 in. Recovering from a blunder I made while emailing a professor, Minimising the environmental effects of my dyson brain. Additionally, you can use KERDI-BAND around corners, seams, and joints to help with a waterproof installation. modified thin-set mortar is not recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. Yes, Schluter membranes can go over cement board. We ended up sponging the Hardi and wetting and booking the Kerdi (a la wallpaper), and that made the installation go much smoother. If you are laying tile on floors that are wavy or out of level, self-leveling underlayment is a great solution. This liquid waterproofing solution does more than keep water away, it also promotes tile adhesion and prevents cracking. If done according to manufacturers instructions, it will seal nicely. 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. Learn about the options in exterior siding before you choose, Before you pick up a single tile, pull from these tips for expert results, Slip resistance, curves and even the mineral content of your water all affect which tile is best for your shower, We help a Houzz user ask all the right questions for designing a stylish, practical and safe shower bench, This isn't a light DIY project: You'll need heavy-duty tools and plenty of protection for your home and yourself, In steamy quarters, tile needs to stand up to all that water and vapor in style. Yes. The fastest method [for me and possibly other dilettants] is to stroke the knife at a diagonal to the comb marks, top down, center out, pushing all the air before you with short, overlapping strokes.-Thinset needs to be pretty darn wet: Needs to stay put when combed, but should be soft and shiney. Do new devs get fired if they can't solve a certain bug? What to use to flatten and prep wall before installing Schluter Kerdi membrane for tiling? 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. You provide the pitch during the tile set. Hang the cement boar. GoBoard is a kind of backer board because the main elements of a backer board are cement, silica, fiberglass, etc. Then you can apply a thin layer of KERDI-FIX to the board, the membrane over top . Step 4: Place the Tile. I used 1/2 Hardibacker board over the studs and then used the Kerdi membrane over the Hardi. How to follow the signal when reading the schematic? If you want a cement board, use Durock or Wonderboard. You have to seal every little hole in the floor so the underlayment doesnt seep into spaces below. Though, each product comes with its own individual characteristics, and pros and cons. Both may be effective substrates, but Kerdi Board boasts significant advantages. First Kerdi can be installed on drywall or cement board. I will say that to is easier to put the membrane over drywall than cement board. You can apply it on PVC, metal, slabs, walls, and floors. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? . Kerdi can even be installed over drywall. One thing I do like fibercement (Hardie) for is when I need thin strips of cement board. The shower tray eliminates the need for a mortar bed. Additionally, it is important to waterproof cement board before tiling, as the grout and tiles can help keep the board watertight. In my. The shower is ready for tile. 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-mobile-leaderboard-2','ezslot_25',167,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-mobile-leaderboard-2-0');Waterproofing should be done prior to the installation of any tile including behind the shower tile. 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. This allows the cement to properly hydrate, resulting in a strong, dense bond coat. If you do not already have the hardi up, I recommend using real cement board (Hardi is a fiber-cement) or drywall. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This allows for future compression and an area at the corner where things are more forgiving. Like cement board, the boards are heavy and hard to cut. I also used a larger sized trowel than the one recommend by Schluter. When applying thin-set mortar, the manufacturers instructions should be followed closely. I like to use a garden sprayer to keep the thirsty Kerdi wet. And second, since its foam, the board is super easy to cut with just a utility knife. Step 1: Measure the area. You still use metal lath, but then mix bags of powder and pour the soupy mix onto the floor. If youre not careful, the boards can also leave behind abrasive sandy crumbs that can cause damage to your shower base or tub. Kerdi board, on the other hand, is an extruded polystyrene foam panel. I would fear leaks in all corners of this shower. What precautions should I take installing tile on a backerboard in an area surrounded by cement? Is it ok to fasten a shower surround to Schluter Kerdi curb? Should I redo this wall to avoid a mold sandwich? Send us an email: , What type of thin-set mortar should I use when installing Schluter, Using a Prefabricated Shower Tray and Ramp. Important to overlap seams in a shingle method. I would get someone else. Dean, our tile consultant, says glass mat backer board is his first choice due to the ease of installation, cost, and because his workers like it. It's still applied to cement board. What Is the Difference Between 'Man' And 'Son of Man' in Num 23:19? We use a pump action garden sprayer and its usually dry by the time we clean the sprayer. Putting this stuff on walls is difficult and time . What are the differences between "paperless drywall" and "cement board"? All shower/tub areas should have concrete board (I prefer hardiboard). Sheets of glass mat gypsum are made from water-resistant silicone-treated gypsum, reinforced on both sides by fiberglass mats. 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! ), Minimising the environmental effects of my dyson brain, Finite abelian groups with fewer automorphisms than a subgroup. There is definitely skill & planning required to doit right. LONDON. Install the drain adapter, if needed. However, a cement board is generally easier and less expensive to replace if a repair is needed. Installation; As the GoBoard is very lightweight, it becomes easy to .