This means that even if your waterproofing system leaks, the cement board will remain intact. Retired Moderator - Theatre Guy (and computers). I have corrugated metal shower surround & grab bars. For the floor I make a dry mix mud base and then the Kerdi membrane. Schluter-KERDI is a pliable, sheet-applied, bonded waterproof membrane and vapor retarder with limited crack-bridging capabilities. 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. Anyone who has done more than 1 shower shouldn't start without knowing that. This will prevent water from entering from behind the membrane, and will provide a more secure waterproof layer. Why do you think each board should be able to move at all let alone independently? 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? Install the drain adapter, if needed. However if installed on drywall it is only protecting one side. Why do small African island nations perform better than African continental nations, considering democracy and human development? Once all areas have been properly waterproofed, the walls can be tiled and grouted to create a waterproof surface. Hang the cement boar. Also - use a good thinset. How to follow the signal when reading the schematic? that's home depot homeowner installation method. It worked well - just like wallpapering. Is it suspicious or odd to stand by the gate of a GA airport watching the planes? 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. I used 1/2 Hardibacker board over the studs and then used the Kerdi membrane over the Hardi. Step 2: Determine the room's center. When applying Kerdi membrane to cement board, the edges and seams of the membrane must be lapped, meaning that each layer should overlap the portion underneath it by a minimum of two inches. Kerdi Membrane is a product of Schluter systems. You peeled it off? Drywall under Kerdi would have been a better choice. I agree that gypsum seems very questionable anywhere in the wet areas of a shower. Thanks. Press the Kerdi Membrane into the Thinset Mortar with firm, even pressure to achieve full mortar coverage. Kerdi can even be installed over drywall. Once its cleaned, use caulk to seal all of the seams where the cement board meets the walls. It is also widely available and a relatively inexpensive option approximately $10 for a 3-foot by 5-foot sheet. However, you do still have to take care to waterproof the seams and the fastener penetrations to create a waterproof assembly. 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. We mixed the thinset, it wasn't as smooth as the utube video, but it was close, and we gave it ten minutes. The grid lines on the surface are incredibly helpful for installation and making neat cuts. 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. Its essential to protect surrounding wall and floor surfaces from water or moisture damage that can occur in these areas. You don't want to block off the end of the air chanel and trap half a sheet worth of air under there.-Not paying attention to the direction of my knife. The perfect fold is tricky and many of my first steam showers where built without the sealed slip joint. I think the first one I used was cheap and that was part of the problem. Following the correct application of Kerdi membrane over cement board will ensure a successful waterproofing installation and lasting results for your tile project. PROBLEM SOLVED for Tub Flange when Installing Cement Board and Tile. Step 4: Place the Tile. Foam-core tile backing board has two big advantages over other backer boards. No bulges either, but definetly no thin spots.-Not paying attention to the direction of the comb. Can I put Kerdi board over drywall? Ideally the DalSeal TS would fold into the gap between the wall and ceiling concrete board. They can be installed on any type of support and can even be used to create partitions, with no structural support required. Significantly more time and effort is required to ensure a quality bond when using a modified thinset adhesive with KERDI, and for this reason, it is usually not recommended. x 96 in. This is often accomplished by filling any holes and cracks in the wall with appropriate spackling or patching material. 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. Hardi is definitely a "thirsty" substrate but will work, even without a primer of RedGard. But that doesn't address your question, so it's just a comment, not an answer as such. Using modified thinset on KERDI can be tricky and in some cases, it can cause issues. Should I use Kerdi membrane or cement backerboard? Keep in mind that most tile setters err on the side of caution and brush a waterproofing membrane on top of cement board when it is in wet areas like showers or tub surrounds. KERDI was developed as a waterproofing membrane to be used in . After installing your mud bed, make sure it is fully cured before applying Aquadefense. It is easier to cut than cement board, it is mold resistant, and it has a built-in moisture barrier. Cement board sucks up the moisture and as a result, the kerdi doesn't always stick as well to cement board. I usually use Durock. One thing I do like fibercement (Hardie) for is when I need thin strips of cement board. 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. The problem is on the back side of the drywall, which is not protected. After today's tutorial, you'll gain the confidence to transform your old bathroom into a new space. If done according to manufacturers instructions, it will seal nicely. An extra layer of thinset is then added to the surface of the cement board to adhere the tiles in place. Firstly, it is important to ensure the wall is adequately prepared and that it is smooth, flat and free of defects. One of the major benefits of opting for Kerdi Board over cement board is the ease of installation. When installation is done properly, Kerdi membrane offers a waterproof barrier that can protect the plywood below from moisture. The big issue with cement board is that the thinset will skin over really quickly. We are no longer supporting IE (Internet Explorer), Do not Sell or Share My Personal Information. Creative, C'mon over for a beer! Not to mention, its warrantied by Schluter, giving you the ultimate peace of mind. Yes, you should prime drywall before installing KERDI in order to ensure proper adhesion and a successful installation. I posted a plea for help and Mongo and Bill both gave me good advice. When installing KERDI with . 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. Preparing drywall for KERDI membrane requires a few important steps to ensure a successful application. To line niche shelves, for instance. New England. modified thin-set mortar is not recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. It allows you to easily and quickly create tile-ready elements in bathtub surrounds and platforms, vanities, showers, shelving, and much more. Once the wall is prepped, use a primer that is compatible with the KERDI membrane so that it will properly adhere to the wall. Once you have determined the type of thinset, its important to also consider the weather conditions during installation. Kerdi membrane can be used on cement board, drywall, and, as you may have guessed- greenboard. The tub flange can really be a pain in the butt when installing a tile tub surround. Cement board comes both in 1/4-inch-thick and 1/2-inch-thick versions. No, you do not need to install a vapor barrier, as Kerdi Board is the vapor barrier. Making statements based on opinion; back them up with references or personal experience. We want that inside corner able to move. What precautions should I take installing tile on a backerboard in an area surrounded by cement? If you are good with a trowel and understand how to set up and use screeds as a guide for leveling or forming the mortar, pouring a traditional mortar bed may be a good alternative to tile backer board, especially on uneven or sloping floors. Kerdi can be installed first on drywall or cement board. For the floor I make a dry mix mud base and then the Kerdi membrane. Why are physically impossible and logically impossible concepts considered separate in terms of probability? 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. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[728,90],'remodelormove_com-mobile-leaderboard-1','ezslot_24',166,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-mobile-leaderboard-1-0');If cement board is not waterproof, it can negatively impact the integrity of the tile that is installed on top of it, and can lead to a variety of issues. Additionally, all seams should be sealed with Kerdi Fix and covered with fleece. is the contractor creating a waterproof schluter-kerdi shower? More waste, yes, but I think you have to have a LOT of practice to hang those huge sheets like mongo does. Like cement board, the boards are heavy and hard to cut. Furthermore, if you're working in an older home KERDI-BOARD fits better than cement board in odd spaces. The cement board needs to be clean, free of debris, and dry. It is lightweight and made of expanded polystyrene. You absolutely need to include some sort of substrate (cement board, green board, regular drywall) with the Schluter-Kerdi waterproofing kit. As such, many homeowners and professionals find themselves wondering whether Kerdi Board or cement board is the better tile substrate. 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. When installed, Kerdi Board creates a substrate that is level, flat, square, plumb, and dimensionally stable. A quality underlayment will also serve as a waterproof barrier between the subfloor and the tile surface. Other mistakes I was making early on:-over working the thinset. A hundred times better to have too much before you comb than too little. When installing Schluter Kerdi Membrane over cement backerboard: Should I use Alkali Resistant Mesh Tape and thinset on the seams of the backer board (for long term durability to prevent each board moving independently thus preventing cracking) prior to installing the Kerdi membrane. The kerdi membrane will probably do the same, and its regularly installed over drywall which is probably less stable. The best answers are voted up and rise to the top, Not the answer you're looking for? Not even the plumber's fault as it was just a bad valve. 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. Problem with very thick cement board/ tile/bullnose edge, Steam Shower Slip Joint Detail - The secret is in the boarding stage. If you do not already have the hardi up, I recommend using real cement board (Hardi is a fiber-cement) or drywall. I used this to seal a 3 1/2 by 6 1/2 foot shower with 7 foot walls. Without an underlayment, even the slightest movement of the subfloor can result in cracking of the tile and crumbling of the grout lines. To put things into perspective, consider that a tile floor is made up of three layers: the subfloor, the underlayment, and the tile surface you walk on. Once this is done, continue the installation by following the directions for the particular Kerdi product being used. Personally, I like standard drywall. Caulk the gap. Or will the Kerdi membrane (with seams taped with kerdi band) prevent each board from moving independently? 3. Kerdi-Board is an extruded polystyrene foam panel, with reinforcing material on both sides, covered by fleece webbing for effective anchoring of thin-set mortar. Will add it in. Installation. 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 also helped me to work in smaller sheets. 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? What is a word for the arcane equivalent of a monastery? That was not a fault of the Kerdi, or the installation. Is a PhD visitor considered as a visiting scholar? Set ceramic and stone tile over the KERDI membrane with unmodified thin-set mortar, including large format tiles. We think it is the cement board (Durock) sucking the moisture out of the unmodified thinset. It is important to waterproof Hardie board to make it more water-resistant, as well as to protect the materials from the elements. For all the substrates listed in this Handbook (e.g., gypsum board, cement backerboard, etc. The colour is different. Asking for help, clarification, or responding to other answers. Re: Kerdi on shower curbs. Cement boards are typically capable of withstanding larger amounts of water, while a Schlter system is designed to hold up well only in dry conditions. 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. However, a cement board is generally easier and less expensive to replace if a repair is needed. Recovering from a blunder I made while emailing a professor, Minimising the environmental effects of my dyson brain. It could take longer if the space is particularly wet or humid. If youre not careful, the boards can also leave behind abrasive sandy crumbs that can cause damage to your shower base or tub. Cement board (cbu) is not waterproof, but is not damaged by being wet. All shower/tub areas should have concrete board (I prefer hardiboard). Additionally, seal the space around any pipes and fixtures that can be found in the shower. 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. Once the adhesive has been applied and has had time to properly cure, then the KERDI membrane can be applied to the wall. If your going to do the job do it right, and give professional advice pls. This will help you achieve the best results and ensure the longevity of your project. rev2023.3.3.43278. Properly waterproofing a shower area sharing a living room wall, Can I use cement accelerator to decrease setup time of modified thinset. If a pipe or faucet ever leaks in the wall this will ruin your shower. En cliquant sur Accepter , j'accepte l'utilisation des cookies telle qu'elle est dcrite plus en dtail dans la Politique d'Utilisation des Cookies de Houzz. Spacers are the next step. How do you show the depth of a hole in a drawing? 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.
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