It may take more than 1 beer:). For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. LONDON. Allow the primer to dry completely before proceeding with the KERDI installation. Drywall under Kerdi would have been a better choice. Look at it this way; Withe Kerdi, you either trust it or you don't. This will help you achieve the best results and ensure the longevity of your project. Actually if you watch any pros work (not on crappy shows) on TV you will see them use backer board 99% of the time. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[580,400],'remodelormove_com-leader-2','ezslot_21',165,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-leader-2-0');Once the seams are sealed, lay down a waterproof coating to the floor and walls of the shower space. Hi David. When doing so, it is important to ensure that the drywall surface is clean and free of dust, grease, and loose paint. Kerdi Board is suitable for a number of interior applications. x 96 in. If you do not already have the hardi up, I recommend using real cement board (Hardi is a fiber-cement) or drywall. Depending on factors such as room temperature, humidity, and ventilation in the area, this could take anywhere from 1 to 3 days. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Greenboard is the same as regular drywall. To line niche shelves, for instance. Installation. But that doesn't address your question, so it's just a comment, not an answer as such. #3 This is a DIY site. Kerdi-Board 1/2 in. x 48 in. x 96 in. Building Panel 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. I agree that gypsum seems very questionable anywhere in the wet areas of a shower. 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. Run a damp towel over the cement board surface to dust . Kerdi Membrane not sticking to cement board - John Bridge Foam-core tile backing board has two big advantages over other backer boards. It is designed to form a waterproof layer between cement board and tiles, helping create a watertight installation. Yes, you need waterproofing behind shower tile. Slap it up comb it out, leave every ridge tall and perfect. The shower tray eliminates the need for a mortar bed. But a mortar bed does have advantages. We store towels, medicine, toiletry supplies, first-aid gear, massage devices, facial steamers, spare Painting your garage is a great way to improve the look of the space and make the walls easier to clean. Properly waterproofed Hardie board should last for many years. 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. :/. The difference between the phonemes /p/ and /b/ in Japanese. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. The Schlter system tends to be more durable than a cement board, but it also depends on the particular application and the weather. They are designed to provide a waterproof, vapor-tight layer to the substrate, which in this case would be the cement board. Kerdi Board Vs. Cement Board (What's The Difference?) - Home Mindset Installation is simple- just trowel a layer of thin-set adhesive on the floor and embed the mat in it, then fill the cavities with thin-set. Welcome to the site. 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. Can you put KERDI over regular drywall? - remodelormove.com To subscribe to this RSS feed, copy and paste this URL into your RSS reader. MAPEI makes products for each step of the remodel process, giving you a single source solution, and only one phone number to call if you need assistance! The completed assembly takes the place of more traditional backer board when installed over 3/4-inch wood subfloors. 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. . 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. 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. The surface of Wedi is perfect for bonding. First, felt paper is stapled to the floor and covered with expanded metal lath. 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. Can you remove tile from Kerdi membrane? Waterproofing cement board is relatively simple and there are several different waterproofing products available. Cement board is the most common and widely-known backer board. Though, each product comes with its own individual characteristics, and pros and cons. 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. A quality underlayment will also serve as a waterproof barrier between the subfloor and the tile surface. 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. To prevent those movements from transferring to the tile floor, consider installing an uncoupling membrane between the concrete and tile surfaces. Once all areas have been properly waterproofed, the walls can be tiled and grouted to create a waterproof surface. When applying thin-set mortar, the manufacturers instructions should be followed closely. How to prep a shower for tile with Schluter Kerdi - TwoFeetFirst Do You Need Uncoupling Membrane Over Concrete? - On Secret Hunt Using Kolmogorov complexity to measure difficulty of problems? Regardless, cement board is a great, trusted tile substrate that will work well on both walls and floors. Once the membrane is in place, it can be sealed and reinforced with Kerdi-Fix sealant, Kerdi band, and Kerdi-Drain for added waterproofing strength. What Is the Difference Between 'Man' And 'Son of Man' in Num 23:19? Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? Install an Uncoupling Membrane Between Concrete and Tile. 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. I want to mount a cast iron bathtub, but not pull down my 1905 plaster and lath. Tile Shower SurroundCement Backerboard Location? Je peux rejeter les cookies non essentiels en cliquant sur Grer mes prfrences . Shower walls construction made easy with Kerdi-Board panels. - La Tuilerie 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 . 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)). However, the answer you provided above suggests that the OP could omit a waterproof membrane, that I. True cement board (Durck, Wonderboard) is my first choice as a tile or Kerdi backer. All it takes is the right preparation. Finally, it is important to remember that any thin-set that has been exposed to moisture must be replaced. You'll know the RG is dry when it turns reallllly dark bright red as opposed to the pinkish color when applied. Kerdi can be installed first on drywall or cement board. 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. The site is called floorelf.com. Whether or not you need a Kerdi membrane is a factor of use. The thin-set mortar should be mixed to a fairly dry consistency and then spread on the surface with a 1/4 inch square notch trowel. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. How "tidy" does the kerdi band need to be? I used this to seal a 3 1/2 by 6 1/2 foot shower with 7 foot walls. I think I'll try using the thinned mixture of Redgard and then try the Kerdi membrane again. Yes, it is possible to put Kerdi over regular drywall. As such, many homeowners and professionals find themselves wondering whether Kerdi Board or cement board is the better tile substrate. . More waste, yes, but I think you have to have a LOT of practice to hang those huge sheets like mongo does. ), Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended. I always install it over cement board or backerboard, never over drywall, even blueboard or the mold resistant greenboard. Needed to interject a little "amateur humor. There is a product called Kerdiboard you might want to look into. Houzz Pro: One simple solution for contractors and design pros, surfer thanked Avanti Tile & Stone / Stonetech. Another advantage is that the polyisocyanurate core of foam boards is waterproof. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? I usually use Durock. Additionally, all thin-set mortars should be suitable for use in wet or feature depths of up to 1/8 inch. Kerdi membrane can be used on cement board, drywall, and, as you may have guessed- greenboard. Additionally, all seams should be sealed with Kerdi Fix and covered with fleece. 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. What to use to flatten and prep wall before installing Schluter Kerdi membrane for tiling? A hundred times better to have too much before you comb than too little. Step 6: Choosing the Next Tile. We tried adding water to the thinset, we tried . Backerboard plus a waterproofing membrane like Redgard is all that is needed for tub surrounds with thinset then tile. Kerdi's systems are fairly reputable. Various products can be used to waterproof shower walls such as water-resistant drywall and cement backer boards. I posted a plea for help and Mongo and Bill both gave me good advice. Will be replacing tub shower combination with tiled shower in my home. I also used a larger sized trowel than the one recommend by Schluter. This allows the cement to properly hydrate, resulting in a strong, dense bond coat. Builder saying he doesn't want to put my trim tile in here. And we are using a drippy mixture, it slides off the trowel. 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. And how do you keep too much water from interfering with the adhesion in the second scenario?Thanks!! Additionally, all thin-set should be allowed to cure for 24 hours before tiles are installed. One of the major benefits of opting for Kerdi Board over cement board is the ease of installation. Cement board sucks up the moisture and as a result, the kerdi doesn't always stick as well to cement board. We mixed the thinset, it wasn't as smooth as the utube video, but it was close, and we gave it ten minutes. This thread is 9 years old and it's the Hardi board that's thirsty not the Kerdi. ), Schluter SET, ALL-SET, FAST-SET or an unmodified thin-set mortar is recommended. Furthermore, if you're working in an older home KERDI-BOARD fits better than cement board in odd spaces. It doesn't matter but you absolutely need to use both a substrate and a waterproofing membrane. 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. First, its super lightweight compared with the rest. In . When screwed to the framing, thin strips of cement board fracture more easily than thin strips of fiber-cement. Yes. The bag says Mapei floortile mortar, it was the only unmodified thinset at our hardware store. Too little, and the kerdi will never show you gray, no matter how you sweat. Why do small African island nations perform better than African continental nations, considering democracy and human development? Cement board is the industry standard when it comes to tile substrates and the most preferred among professionals when installing porcelain or ceramic tile. What type of thin-set mortar should I use when installing Schluter-KERDI? Shouldn't take too long, maybe an hour or so. When I tried putting up the first sheets, which were only 36" x 39", and even though I had SOAKED the hardi, to the point water was pooling on the floor, the thinset was already drying before I got the Kerdi up, and I couldn't get it to adhere properly no matter how hard I tried. We are still most comfortable with full plumber's pan over the curb, including glue-on preformed corners, and also a second layer (usually Kerdi but can be paint-on) on top of CBU wrap over curb. Caulk the gap. What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? Re: Kerdi on shower curbs. All shower/tub areas should have concrete board (I prefer hardiboard). But I did want to understand the cost breakdown as the walls then become WAY more expensive than it would be with Redguard. Sure, you can do it.just be sure to "spritz" or wet the hardi thoroughly before.it's pretty "thirsty.". Cement board is a mineral-based board, usually 30 inches by 60 inches, that is used as a lower, dimensionally stable surface for installing ceramic tile, porcelain tile, or stonework. Yeah it seems that the only products that will be compatible with cement board and the kerdi membrane are bostik ditra-set and schluter all-set (or one of schluters other products). This feature makes building the base structure much easier and more cost . It works well, is what Schluter recommends and I've never had an issue with it. It is important to waterproof Hardie board to make it more water-resistant, as well as to protect the materials from the elements. The best answers are voted up and rise to the top, Not the answer you're looking for? It is a pliable waterproofing membrane that also doubles as a vapor retarder. Since KERDI is impervious, it does not deprive the mortar of its moisture. #1 - Backer board has nothing to do with HD or any other big box. About an argument in Famine, Affluence and Morality, Acidity of alcohols and basicity of amines. Also are you saying that you wet ("booking the Kerdi") the Kerdi, as well? Here are the fundamentals of tile installation over cement board. Personally, I like standard drywall. It only takes a minute to sign up. Kerdi Vs. RedGard (Compared) - Build It Fine Why you use cement board? Can you put Kerdi over cement board? - TipsFolder.com This is confusing since Kerdi Board has no Kerdi on it. We think it is the cement board (Durock) sucking the moisture out of the unmodified thinset. GoBoard Vs. Kerdi For Your Shower: In-depth Comparison I have corrugated metal shower surround & grab bars. Will be doing a bathroom gut and will be laying durock cement board over plywood sub floor. Modified thin-set mortars must dry for the polymers to coalesce and form a hard . kerdi membrane over osb They are absorbed into the surface material and help keep moisture away from the substrate surface. We waterproof the outside the hardiboard in 99% of the install with something like redgard. The Kerdi is essentially replacing the backerboard. Finally, use a roller or brush to ensure that the membrane is secure and has no wrinkles or air bubbles. A lot of folks like using cement board but it's heavy and requires a waterproofing membrane over it. Bulk update symbol size units from mm to map units in rule-based symbology. Sweeby-Can you clarify- I undestood that the thinset would tend to dry out from the thirsty hardi or skim over from the air; so how does booking the Kerdi help with the first? . 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. It's still applied to cement board. One thing I do like fibercement (Hardie) for is when I need thin strips of cement board.

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