Should I use Kerdi membrane or cement backerboard? And second, since it's foam, the board is super easy to cut with just a utility knife. 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! 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. if you go with vapour barrier, then cement board. Building Panel: Price $ 119 00 $ 202 06 $ 279 00. Schluter-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. 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. 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. The cement board core itself is not waterproof, but it can withstand water without falling apart. All it takes is the right preparation. Kerdi's systems are fairly reputable. Installing cement board involves placing the boards atop a layer of thinset adhesive, a process known as bedding. 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. Also are you saying that you wet ("booking the Kerdi") the Kerdi, as well? KERDI features a modified polyethylene (PEVA) core with non-woven polypropylene on both sides to anchor the membrane in the thin-set mortar. Kerdi-Board panels allow the installer to prepare and create a broad range . Yes, KERDI membrane will stick to cement board. When having to put it up on the wall or measure it for size, you will find that you can get the exact measurements you need without much trouble. Yes, you should prime drywall before installing KERDI in order to ensure proper adhesion and a successful installation. Needed to interject a little "amateur humor. document.getElementById("ak_js_1").setAttribute("value",(new Date()).getTime()); Your email address will not be published. Builder saying he doesn't want to put my trim tile in here. Additionally, seal the space around any pipes and fixtures that can be found in the shower. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. How can I find out which sectors are used by files on NTFS? I trust it and have never had a callback. 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. If any is found, wait a few more hours and then re-inspect. 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 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. Kerdi-Shower-T/-TS/-TT is a prefabricated sloped shower tray with integrated Kerdi waterproofing. Schluter approves their waterproof Kerdi membrane over drywall. Using cement board and a sheet membrane . We just went through a learning curve on the Kerdi and Hardi. Is a PhD visitor considered as a visiting scholar? If your going to do the job do it right, and give professional advice pls. For the floor I make a dry mix mud base and then the Kerdi membrane. Why is this the case? But I did want to understand the cost breakdown as the walls then become WAY more expensive than it would be with Redguard. 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). Fiber cement board is available in 1/4-inch and 1/2-inch thicknesses. Let's start! Cement board (cbu) is not waterproof, but is not damaged by being wet. It's still applied to cement board. If you want added info there's an old Kerdi thread here. This will help you achieve the best results and ensure the longevity of your project. Drywall under Kerdi would have been a better choice. Its essential to protect surrounding wall and floor surfaces from water or moisture damage that can occur in these areas. The great thing about Kerdi Board is that it is lightweight and easier to maneuver. Your air bubbles will travel along the valleys you've made, and it's way better if you only have to move them 20 inches to the nearest edge rather than all the way from the ceiling to the floor [Again, Mongo can, but he has mad skills].-Not paying attention to the principle of bedding top down, center out. Such membranes typically come in a brush or a roller form and can help create a durable barrier against water infiltration. The cement board needs to be clean, free of debris, and dry. This will help to ensure that all drywall is completely covered. They can be installed on any type of support and can even be used to create partitions, with no structural support required. I think it is engrained in me to do that so I forget to mention it. link to How To Organize A Bathroom Closet. Asking for help, clarification, or responding to other answers. With so many different types of underlayment to choose from, it can be hard to decide which is best for your project. Je peux rejeter les cookies non essentiels en cliquant sur Grer mes prfrences . A hundred times better to have too much before you comb than too little. Schluter Kerdi-Shower-T/-TS/-TT 48 in. there should be a small gap between the backer board and the tub. Ceramic and porcelain tile, more than almost any other surface material, need a stable . Install the Schluter Kerdi membrane over the backer board using the correct mortar. Cross your fingers and hope it's all OK. Not the best Kerdi Showcase. Hello D Zak! This means that even if your waterproofing system leaks, the cement board will remain intact. #4 You could be adding a good 1000 pounds to your install too. Why do small African island nations perform better than African continental nations, considering democracy and human development? Connect and share knowledge within a single location that is structured and easy to search. 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. Preparing drywall for KERDI membrane requires a few important steps to ensure a successful application. We are no longer supporting IE (Internet Explorer) as we strive to provide site experiences for browsers that support new web standards and security practices. 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. This will ensure that the coating sticks to the cement board. x 5-ft. and 3 x 5-ft. sheets of cement board are sized for efficient use around bathtubs and showers. 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. Hardi is definitely a "thirsty" substrate but will work, even without a primer of RedGard. 4. It works well, is what Schluter recommends and I've never had an issue with it. #3 This is a DIY site. To learn more, see our tips on writing great answers. :/. 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. When it comes to selecting thinset for cement board, there are a few important factors to consider. Cement board is a heavy mess compared to drywall, and drywall is a heavy mess compared to Kerdi Board. ps, now that you don't need it anymore you can throw that useless cheap piece of crap magnesium float my way. Foam-core tile backing board has two big advantages over other backer boards. Yes, it is possible to put Kerdi over regular drywall. It's a lightweight polystyrene board faced with Kerdi that comes in various thicknesses that you can use in place of drywall or cement board. Hardie board is thirsty, but that's way too fast. Step 7: Cut the Tile. I used this to seal a 3 1/2 by 6 1/2 foot shower with 7 foot walls. However if installed on drywall it is only protecting one side. 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. While cement board is a reliable tile underlayment, it isnt completely waterproof only water-resistant. Jessica considers herself a home improvement and design enthusiast. This creates a strong, waterproof tile backer that also functions as an uncoupling membrane. Cementboard sufficient to a tub surround is dirt cheap .vs. Allow the primer to dry completely before proceeding with the KERDI installation. You peeled it off? After installing your mud bed, make sure it is fully cured before applying Aquadefense. Learn more about Stack Overflow the company, and our products. Cement board is the industry standard when it comes to tile substrates and the most preferred among professionals when installing porcelain or ceramic tile. Are there tables of wastage rates for different fruit and veg? Press the Kerdi Membrane into the Thinset Mortar with firm, even pressure to achieve full mortar coverage. 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. Once its applied, the last step is to follow up the waterproof coating with a waterproof sealant. Once this is done, continue the installation by following the directions for the particular Kerdi product being used. Furthermore, if you're working in an older home KERDI-BOARD fits better than cement board in odd spaces. Ditra is manufactured in a 3'3 width and comes in various roll lengths (54sf, 150sf, and 323 sf). There's a really great manual (with diagrams) that makes this all easier to understand. About an argument in Famine, Affluence and Morality, Acidity of alcohols and basicity of amines. Bathroom closets are often catch-alls for anything and everything remotely related to self-care. Shouldn't take too long, maybe an hour or so. Kerdi Membrane is a product of Schluter systems. Please feel free to reach out to our Product Support Team at 1-800-992-6273 if you need anything. 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. 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. No bulges either, but definetly no thin spots.-Not paying attention to the direction of the comb. @JimmyFix-it - You are right. Retired Moderator - Theatre Guy (and computers). 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. Once you have determined the type of thinset, its important to also consider the weather conditions during installation. Good luck with your project. Connect and share knowledge within a single location that is structured and easy to search. Yes, Kerdi membrane can be installed over plywood. It is important to seal any imperfections in the drywall to ensure a long-lasting installation and to minimize water infiltration. The curb doesn't have to be any wider than a 2x4. 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. Allow the adhesive to cure for the amount of time recommended by the adhesives manufacturer. Some being easier to work with than others. 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. Properly waterproofed Hardie board should last for many years. Step 4: Place the Tile. Contact us: 888-472-4588 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. The difference between the phonemes /p/ and /b/ in Japanese. We waterproof the outside the hardiboard in 99% of the install with something like redgard. I used 1/2 Hardibacker board over the studs and then used the Kerdi membrane over the Hardi. 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? 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! When it comes to applying KERDI, however, it is advised to use a regular thinset that includes portland cement as its main component. In order to determine which tile underlayment is right for your project, you need to know which issue youre trying to solve whether its preventing subfloor cracks from transferring to the tile, soundproofing, moisture protection, or providing more rigidity to the tile. 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? However, you do still have to take care to waterproof the seams and the fastener penetrations to create a waterproof assembly. However, a cement board is generally easier and less expensive to replace if a repair is needed. Why you use cement board? I will say that to is easier to put the membrane over drywall than cement board. 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. KERDI was developed as a waterproofing membrane to be used in . see Prop 65 WARNINGS. x 60 in. What was the indicator that let you know that spritzing was not enough, and that you needed to 'sponge' the Hardi? This allows for future compression and an area at the corner where things are more forgiving. 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. It is also widely available and a relatively inexpensive option approximately $10 for a 3-foot by 5-foot sheet. In my. Is it ok to fasten a shower surround to Schluter Kerdi curb? Politique d'Utilisation des Cookies de Houzz. . Or will the Kerdi membrane (with seams taped with kerdi band) prevent each board from moving independently? What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? This feature makes building the base structure much easier and more cost . Depending on your project and the specific cement board you are using, you will want to select a thinset appropriate for both.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[468,60],'remodelormove_com-large-leaderboard-2','ezslot_15',158,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-large-leaderboard-2-0'); The two primary criteria to help guide your selection are the type of cement board you are using and whether you are installing it indoors or outdoors. Why is there a voltage on my HDMI and coaxial cables? Will use the Schluter Shower system. Any competent tile contractor would float the wall in mortar giving you a stronger, level, perfectly flat, and square surface to properly install tile. When applying thin-set mortar, the manufacturers instructions should be followed closely.