I don't want to use the Ditra membrane product but rather tiles directly over the cement boards. 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. 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. I have to redo my tub surround due to moisture leaks and failing grout. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. 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. A place where magic is studied and practiced? When it comes to applying KERDI, however, it is advised to use a regular thinset that includes portland cement as its main component. I have used kerdi, and I have applied it over cement board. With Kerdi Board you get to enjoy an effective product that is lightweight, easy to cut, waterproof, and leaves behind no dust! The drywall's back side fails, and it's just as bad or worse than it was on the tile side. 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. I think the first one I used was cheap and that was part of the problem. 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! 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. Ceramic and porcelain tile, more than almost any other surface material, need a stable . Bathroom closets are often catch-alls for anything and everything remotely related to self-care. However, a cement board is generally easier and less expensive to replace if a repair is needed. Since KERDI is impervious, it does not deprive the mortar of its moisture. Additionally, a liquid water-resistant membrane should be applied over all surface areas before installation. To waterproof Hardie board, you should choose a quality sealer that is designed for use on cement-based sidings. This will help you achieve the best results and ensure the longevity of your project. The colour is different. Project Type: Tile / Category: Bathroom. Kerdi board is a kind of waterproofer because these kinds of boards are made of XPS foam. 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. What I would be most scared off is the fact that no inside or outside corners appear to have been used. 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. This will ensure that the coating sticks to the cement board. Your real issues are the lack of proper corners on this shower. It may take more than 1 beer:). 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. 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. Is a PhD visitor considered as a visiting scholar? 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. 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. To install Kerdi Membrane, start by applying Schulter ALL-SET mortar (or similar) to your cement board substrate using a 1/4" x 3/16" V-Notch Trowel. When installing KERDI with . How do I align things in the following tabular environment? Your email address will not be published. You are wise to use a cement board. Schluter says that the Kerdi membrane and tile can be installed over standard gypsum wall board without any problems. If so, that means breaking up the floor pan. 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. 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. 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. We like that the Kerdi membrane material installs easily over almost any substrate, including standard wallboard. Hi.I have a unique situation. I hope you made the guy flood test his work prior to tiling the shower floor. 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 . A good rule of thumb is 24 hours per inch of thickness, then one more day on top of that to be sure. 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. Sloped Shower Tray KST1220/1525 - The Home Depot. . I imagine we could share some good stories. Modified thin-set mortars must dry for the polymers to coalesce and form a hard . The Kerdi/Daltile TS underlayments do have some valid applications such as in steam shower installations where a bullet proof vapor barrier is required. Also - use a good thinset. 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. How to follow the signal when reading the schematic? You peeled it off? Cement board, Wedi board, Kerdi board, Hardibacker, Densshield, Durock, Permabase, or Wonder board . You are telling someone "to have" an artistry that not only takes art skills, knowing how to mix mortar for different situations, and a good amount of practice. We installed cement board on the walls, and today when we attempted to apply the Kerdi membrane we could not get it to adhere. If you can avoid that, the demo would be ~easy enough to maybe have some friends who'd work for beer come over and help you knock it out. Maybe try another brand of thinset? Underlayment is designed to smooth out uneven areas of the subfloor and form a rigid layer that prevents the flooring from bending. Cement board and grout are not water proof, if there's Kerdi no moisture is ever going to be able to get behind it. Firstly, it is important to ensure the wall is adequately prepared and that it is smooth, flat and free of defects. But a mortar bed does have advantages. Problem with very thick cement board/ tile/bullnose edge, Steam Shower Slip Joint Detail - The secret is in the boarding stage. BTW the older Kerdi thread referencedwas excellent. I would avoid Hardi, as Avanti is right that it is thirsty. Go with smaller bags or only mix half. Connect and share knowledge within a single location that is structured and easy to search. I just a few weeks ago put kerdi on top of hardi-board in my shower and it was PAINFUL! @JimmyFix-it - hardiboard is not really porous unless it is completely saturated. However, you do still have to take care to waterproof the seams and the fastener penetrations to create a waterproof assembly. 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. Will be doing a bathroom gut and will be laying durock cement board over plywood sub floor. When applying the primer, make sure to cover all surfaces thoroughly, as these will be completely covered by the KERDI membrane. that's home depot homeowner installation method. Yes, Schluter membranes can go over cement board. Plus, if you use the mold and moisture resistant drywall, it will be extra insurance against mold. Glass mat gypsum board is a better choice. With that said, the key benefits of Kerdi Board include: While cement board may be the most common and widely-known tile substrate, Kerdi Board is giving it a run for its money. I posted a plea for help and Mongo and Bill both gave me good advice. Schulter Ditra is manufactured by Schluter Systems and is a 1/8 thick polyethylene uncoupling membrane that is specifically designed for tile installations. Cementboard sufficient to a tub surround is dirt cheap .vs. Wedi showers feature a pre-sloped base that is already installed. Kerdi 3 ft. 3 in. I think I'll try using the thinned mixture of Redgard and then try the Kerdi membrane again. 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. Plus, most self-leveling formulas harden very fast, so you have to plan carefully so you can mix and pour quickly. ps, now that you don't need it anymore you can throw that useless cheap piece of crap magnesium float my way. Once all areas have been properly waterproofed, the walls can be tiled and grouted to create a waterproof surface. If you want a cement board, use Durock or Wonderboard. 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. 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. Mike Holmes uses backer on his show. You just need a hammer and wonderbar for the walls. New England. Now there's nothing particularly wrong with fiber-cementit's just not my first choice. Cut the Kerdi membrane to size using a utility knife or scissors. Welcome to the site. I always install it over cement board or backerboard, never over drywall, even blueboard or the mold resistant greenboard. ! It is designed to form a waterproof layer between cement board and tiles, helping create a watertight installation. But I did want to understand the cost breakdown as the walls then become WAY more expensive than it would be with Redguard. The shower is ready for tile. 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. I guess that why it was so frustrating that cement board is just sooo thirsty. See the foam bench and the corners. They are square. They can be installed on any type of support and can even be used to create partitions, with no structural support required. 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.

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