Needed to interject a little "amateur humor. Cement board is particularly vulnerable to water damage, so waterproofing can help protect it and help it last longer. On a vertical surface, very little moisture . I agree that gypsum seems very questionable anywhere in the wet areas of a shower. The Schlter system tends to be more durable than a cement board, but it also depends on the particular application and the weather. Seams and joints should also be waterproofed and caulked to prevent water from seeping through. Additionally, the drywall should be primed with a latex primer before applying the Kerdi membrane. Why is there a voltage on my HDMI and coaxial cables? 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. This is the traditional tile backer. 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. Yes, you need waterproofing behind shower tile. I ended up putting up a thin, skim-coat of thinset all over the hardi board, letting it dry, and then putting up the kerdi. Should I use Kerdi membrane or cement backerboard? Yes, KERDI membrane will stick to cement board. No, you do not need to install a vapor barrier, as Kerdi Board is the vapor barrier. Send us an email: , What type of thin-set mortar should I use when installing Schluter, Using a Prefabricated Shower Tray and Ramp. Additionally, if the cement board isnt waterproof, it can also cause mold and mildew issues, as well as dry wall damage from the moisture seeping through. Shouldn't take too long, maybe an hour or so. I still wet the walls first. In normal residential use I wouldn't worry about it. We think it is the cement board (Durock) sucking the moisture out of the unmodified thinset. x 48 in. Why is this the case? If installing large format tiles (over 15"), be sure to give the Aquadefense at least 8 hours to cure first. I appreciate your help and your quick response. . They are square.
KERDI was developed as a waterproofing membrane to be used in . Can I put Kerdi board over drywall? Not to mention, its warrantied by Schluter, giving you the ultimate peace of mind. ! 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. Cut the Kerdi membrane to size using a utility knife or scissors. http://www.schluter.com/schluter-us/en_US/Shower-System/KERDI-SHOWER-KIT/Schluter%C2%AE-KERDI-SHOWER-KIT/p/KERDI_SHOWER-KIT, We've added a "Necessary cookies only" option to the cookie consent popup. And second, since its foam, the board is super easy to cut with just a utility knife. Water-resistant gypsum board, or green board, was used in the past as a tile backer but is no longer recommended, mainly because better products are available. All shower/tub areas should have concrete board (I prefer hardiboard). This will help protect the cement board from water damage, and is often a specific type of coating designed for use with cement boards. When it comes to selecting thinset for cement board, there are a few important factors to consider. As such, many homeowners and professionals find themselves wondering whether Kerdi Board or cement board is the better tile substrate. I have used kerdi, and I have applied it over cement board. A mortar wall is better and can be customized easier. Schluter says that the Kerdi membrane and tile can be installed over standard gypsum wall board without any problems. I don't want to use the Ditra membrane product but rather tiles directly over the cement boards. Both may be effective substrates, but Kerdi Board boasts significant advantages. Step 8: Allow to dry. Allow the adhesive to cure for the amount of time recommended by the adhesives manufacturer. Hardie board is thirsty, but that's way too fast.
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. It only takes a minute to sign up. Probably the simplest way is to caulk the gap with 100% silicone or a urethane sealant. 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. Once its cleaned, use caulk to seal all of the seams where the cement board meets the walls. I hang Kerdi on cement board and fibercement board all the time. 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. Additionally, you can use KERDI-BAND around corners, seams, and joints to help with a waterproof installation. Thanks to Mongo's earlier post, we knew we'd have to spritz the Hardi -- but found that even that wasn't quite enough. If youre not careful, the boards can also leave behind abrasive sandy crumbs that can cause damage to your shower base or tub. And for a more secure fit, you can also use screws. A square foot of half-inch thick cement board weighs roughly 40 ounces, while the equivalent area of a Wedi board weighs about 75% less. A quality underlayment will also serve as a waterproof barrier between the subfloor and the tile surface. Hang the cement boar. Cement board is readily available and relatively inexpensive (about $10 for a 3 x 5-ft. sheet). Schluter-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. After today's tutorial, you'll gain the confidence to transform your old bathroom into a new space. Finally, it is important to remember that any thin-set that has been exposed to moisture must be replaced. Asking for help, clarification, or responding to other answers. An extra layer of thinset is then added to the surface of the cement board to adhere the tiles in place. (3ft-3in wide)Or will the Kerdi membrane (with seams taped with kerdi band) prevent each board from moving . that's home depot homeowner installation method. Good luck with your project. What changes do you suggest to make Bathroom looks more updated? Properly waterproofing a shower area sharing a living room wall, Can I use cement accelerator to decrease setup time of modified thinset. The gridlines printed on the surface are beneficial for the installation process, also allowing for quick, neat cuts with a utility knife. Plus, most self-leveling formulas harden very fast, so you have to plan carefully so you can mix and pour quickly. Installing cement board involves placing the boards atop a layer of thinset adhesive, a process known as bedding. The main types of cement board you could encounter are Fibre Reinforced Cement (FRC) board and gypsum board. Following the correct application of Kerdi membrane over cement board will ensure a successful waterproofing installation and lasting results for your tile project. 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.' Preparing drywall for KERDI membrane requires a few important steps to ensure a successful application. It doesn't matter but you absolutely need to use both a substrate and a waterproofing membrane. How should I transition between cement board floor and alcove tub? The product involves an extruded polystyrene foam panel, with specialized reinforcement materials on both sides. I want to mount a cast iron bathtub, but not pull down my 1905 plaster and lath. Overall, waterproofing behind and around shower tile is a critical part of any installation to ensure that the area is adequately protected from water and moisture damage. Mike Holmes uses backer on his show. #4 You could be adding a good 1000 pounds to your install too. Given the complexity, its easy to see why even experienced tile setters avoid dry-pack mortar and use backer board instead when they can. The shower tray eliminates the need for a mortar bed. you should still water proof with a liquid membrane product like RedGuard. You just need a hammer and wonderbar for the walls. You absolutely need to include some sort of substrate (cement board, green board, regular drywall) with the Schluter-Kerdi waterproofing kit. All shower/tub areas should have concrete board (I prefer hardiboard). While cement board and grout are not waterproof, Kerdi is and can even be directly installed over drywall. Gettin' a little delirious. If he did the framing for the shower, then in order to measure for it correctly, he would need to know how thick the tile is so that he can avoid exactly this problem. The Kerdi is essentially replacing the backerboard. One of the major benefits of opting for Kerdi Board over cement board is the ease of installation. I can take a bit of it off the wall and roll it into a ball. Tile can be installed directly over Kerdi-Board using the thinset method; For use with ceramic and natural stone tile; Return Policy; California residents.
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. Allow the primer to dry completely before proceeding with the KERDI installation. 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.
Can you put KERDI over regular drywall? - remodelormove.com ".1) is is okay to use kerdi board instead of ditra on the floor? Why do small African island nations perform better than African continental nations, considering democracy and human development? I've never had a failure. Sloped Shower Tray KST1220/1525 - The Home Depot. Additionally, seal the space around any pipes and fixtures that can be found in the shower. This is necessary to ensure that the membrane will adhere properly to the drywall. (3ft-3in wide). One of the major benefits of opting for Kerdi Board over cement board is the ease of installation. A place where magic is studied and practiced? One thing I do like fibercement (Hardie) for is when I need thin strips of cement board. Hi David. Schulter Ditra is manufactured by Schluter Systems and is a 1/8 thick polyethylene uncoupling membrane that is specifically designed for tile installations. 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. First Kerdi can be installed on drywall or cement board. Properly waterproofed Hardie board should last for many years. Additionally, all thin-set should be allowed to cure for 24 hours before tiles are installed. Sledge hammers for the floor, that might take a bit of time. 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. What Is the Difference Between 'Man' And 'Son of Man' in Num 23:19? New England. 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. 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. Kerdi membrane is a waterproofing material that is designed to be used in wet areas such as bathrooms and showers before tiles are installed. I like to use a garden sprayer to keep the thirsty Kerdi wet. Why do you think each board should be able to move at all let alone independently? RedGard, on the other hand, is a liquid waterproofing membrane made by Custom Building Products. If you are laying tile on floors that are wavy or out of level, self-leveling underlayment is a great solution. You peeled it off? Cement board is the industry standard when it comes to tile substrates and the most preferred among professionals when installing porcelain or ceramic tile. It is also essential that cement board joints and fasteners be sealed and waterproofed with the Kerdi Fix sealant to help prevent water from leaking into the wall and floor cavities. One thing I do like fibercement (Hardie) for is when I need thin strips of cement board. Required fields are marked *. 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. #1 - Backer board has nothing to do with HD or any other big box. Look at it this way; Withe Kerdi, you either trust it or you don't. Following the instructions for the product being used and ensuring that all of the necessary steps are followed will help to ensure a successful installation. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. is that because water doesn't really hit that area?" - Lisa Jasper That's pushing it but should be fine. You're correct if you use the shluter kerdi membrane you do not use a vapour barrier since it creates a sandwhich effect that doesn't allow the substrate . What? 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. It looks like Kerdi membrane is ~$2/sqft ($200 for a 108sqft roll) and kerdi board is $3.7/sqft ($115 for a 4x8 sheet (Lowes)). 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. It could take longer if the space is particularly wet or humid. Like cement board, the boards are heavy and hard to cut. There is definitely skill & planning required to doit right. You'll know the RG is dry when it turns reallllly dark bright red as opposed to the pinkish color when applied. We tried adding water to the thinset, we tried . The completed assembly takes the place of more traditional backer board when installed over 3/4-inch wood subfloors. However, the answer you provided above suggests that the OP could omit a waterproof membrane, that I. The 30-in. This allows for future compression and an area at the corner where things are more forgiving. Cement board (cbu) is not waterproof, but is not damaged by being wet. 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. I think it is engrained in me to do that so I forget to mention it. Then cement, sand and water are mixed together to a crumbly consistency and floated over the lath to form a flat surface. They can be installed on any type of support and can even be used to create partitions, with no structural support required. To get the most protection from the cement board, it should be installed in a way that ensures it is waterproof, in addition to being secured properly with the right adhesive and screws. 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. Greenboard is the same as regular drywall. If cement board had been used, most likely the damage would have been much less that what I have to deal with now. The Kerdi-Line prefab pans and drains make me feel way more comfortable with the waterproofing. 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. Houzz Pro: One simple solution for contractors and design pros, surfer thanked Avanti Tile & Stone / Stonetech. Will use the Schluter Shower system. A 1/2-inch thick, 3 x 5 foot sheet weighs just 7-1/2 pounds, compared with 45 pounds for a similar size sheet of cement board. Everyone knows brick and stucco, but what about fiber cement and metal? Yes, it is possible to put Kerdi over regular drywall. Any competent tile contractor would float the wall in mortar giving you a stronger, level, perfectly flat, and square surface to properly install tile.
Schluter-KERDI | Waterproofing (KERDI) | Schluter This product is available in 3/16", 3/8", 1/2", 5/8" 3/4", 1" 1-1/2" and 2" thicknesses, allowing for a wide variety of installation options. Kerdi board, on the other hand, is an extruded polystyrene foam panel.
HardieBacker with Hydrodefense instead of Kerdi Board? : r/DIY - reddit We ended up sponging the Hardi and wetting and booking the Kerdi (a la wallpaper), and that made the installation go much smoother. 173 upvotes. x 60 in. Step 2: Determine the room's center.
Kerdi on shower curbs - JLC-Online Forums Using Kerdi Schlueter membrane with cement board. - Houzz To create a watertight shower assembly, we installed Schluter's Kerdi membrane over the drywall, just as we would for tile.Write by:. Once the adhesive has been applied and has had time to properly cure, then the KERDI membrane can be applied to the wall. x 96 in. I imagine we could share some good stories.
What type of thin-set mortar should I use when installing Schluter-KERDI? Then you can apply a thin layer of KERDI-FIX to the board, the membrane over top . Using self-leveling underlayment takes careful prep work. I also used the Kerdi drain. When it comes to applying KERDI, however, it is advised to use a regular thinset that includes portland cement as its main component. Installation.
Tile Backer Board Breakdown - DIYTileGuy I used this to seal a 3 1/2 by 6 1/2 foot shower with 7 foot walls. 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.