kerdi membrane over cement board

. Is it Sinful to put Kerdi over Hardi-backer? - Houzz 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. Moisture resistant can cause similar problems, and there is absolutely no advantage to it. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. However, you do still have to take care to waterproof the seams and the fastener penetrations to create a waterproof assembly. Kerdi-Board 1/2 in. x 48 in. x 96 in. Building Panel You'll know the RG is dry when it turns reallllly dark bright red as opposed to the pinkish color when applied. 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.' 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. Additionally, all thin-set should be allowed to cure for 24 hours before tiles are installed. I used this to seal a 3 1/2 by 6 1/2 foot shower with 7 foot walls. rev2023.3.3.43278. Making statements based on opinion; back them up with references or personal experience. It is designed to form a waterproof layer between cement board and tiles, helping create a watertight installation. Cross your fingers and hope it's all OK. Not the best Kerdi Showcase. Hello D Zak! Modified vs. Unmodified Mortar With Kerdi Membranes Make sure the floor is level in the shower. Is a PhD visitor considered as a visiting scholar? To create a watertight shower assembly, we installed Schluter's Kerdi membrane over the drywall, just as we would for tile.Write by:. PROBLEM SOLVED for Tub Flange when Installing Cement Board and Tile. The manual can be found here: http://floorelf.com/waterproof, I would say unless you are experienced in working with Schluter-Kerdi waterproofing membrane kit, then I would say work with an easier waterproofing approach, either liquid waterproofing or a combination of liquid and traditional waterproofing (plastic covering the wood frame). 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. This will help to ensure that all drywall is completely covered. 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. I imagine we could share some good stories. Connect and share knowledge within a single location that is structured and easy to search. Hi.I have a unique situation. Can you put Kerdi membrane over cement board? Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. You just need a hammer and wonderbar for the walls. The main issue caused by non-waterproof cement boards is the eventual warping and damage to the tiles, making it difficult and costly to fix without removing all the tile and starting over. Hardie board is thirsty, but that's way too fast. Schluter says that the Kerdi membrane and tile can be installed over standard gypsum wall board without any problems. What is a word for the arcane equivalent of a monastery? Cement board sucks up the moisture and as a result, the kerdi doesn't always stick as well to cement board. Blocking should be constant across this area when openings are larger than your fist. Schulter Ditra is manufactured by Schluter Systems and is a 1/8 thick polyethylene uncoupling membrane that is specifically designed for tile installations. Re: Kerdi on shower curbs. It is a topical waterproofing layer that is put over the substrate to keep water from getting to the wood frame and nails. All shower/tub areas should have concrete board (I prefer hardiboard). We use a pump action garden sprayer and its usually dry by the time we clean the sprayer. Cement board is the most common and widely-known backer board. Regardless, cement board is a great, trusted tile substrate that will work well on both walls and floors. While cement board may be the most common and widely-known tile substrate, Kerdi Board is giving it a run for its money. Given the complexity, its easy to see why even experienced tile setters avoid dry-pack mortar and use backer board instead when they can. And second, since its foam, the board is super easy to cut with just a utility knife. 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. I've seen preferences regarding HardieBacker and the cement board products such as Wonder Board. Do I have to use Kerdi tape with Ditra membrane? I guess I could save a few $ and laminate 1/4" drywall there instead.IOW, is hardi OK to level out the tub flange?Not that it matters, but the tile will be 3x6 carrara to the ceiling.Casey. Hardi is definitely a "thirsty" substrate but will work, even without a primer of RedGard. Why you use cement board? Using modified thinset on KERDI can be tricky and in some cases, it can cause issues. You absolutely need to include some sort of substrate (cement board, green board, regular drywall) with the Schluter-Kerdi waterproofing kit. 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. 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. Kerdi Board vs. Cement Board: What Are The Major Differences? The Pros and Cons of Various Tile Backers | Family Handyman Aquadefense is approved by IAPMO for use as a shower pan liner, but be sure to check your local building codes, as some areas of the country still require the PVC liner. But you might be struggling to figure out what kind of paint to use on garage walls. Self-leveling underlayment has many of the same advantages as a dry-pack mortar bed but doesnt require as much skill to install. And for a more secure fit, you can also use screws. This creates a strong, waterproof tile backer that also functions as an uncoupling membrane. The niche' intermediate shelf isn't actually attached, to enable specific placement for each unique tiling application. 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. You have to seal every little hole in the floor so the underlayment doesnt seep into spaces below. Creative, C'mon over for a beer! No bulges either, but definetly no thin spots.-Not paying attention to the direction of the comb. 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. We installed cement board on the walls, and today when we attempted to apply the Kerdi membrane we could not get it to adhere. There is definitely skill & planning required to doit right. x 33 ft. Waterproofing Membrane: Kerdi-Board 1/2 in. Kerdi Membrane Over Greenboard (Is It Recommended?) Can be cut to size easily using a utility knife. Glass mat gypsum board is a better choice. This will ensure that the coating sticks to the cement board. Why are physically impossible and logically impossible concepts considered separate in terms of probability? Some being easier to work with than others. you should still water proof with a liquid membrane product like RedGuard. Seams and joints should also be waterproofed and caulked to prevent water from seeping through. 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. 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 easier to cut than cement board, it is mold resistant, and it has a built-in moisture barrier. Make sure to use multiple coats, if necessary. What do you mean it doesn't adhere? #1 - Backer board has nothing to do with HD or any other big box. How "tidy" does the kerdi band need to be? If you can paint a wall, you can use RedGard. Though, each product comes with its own individual characteristics, and pros and cons. I usually use Durock. @JimmyFix-it - You are right. About an argument in Famine, Affluence and Morality, Acidity of alcohols and basicity of amines. Too little, and the kerdi will never show you gray, no matter how you sweat. In . KERDI was developed as a waterproofing membrane to be used in . Connect and share knowledge within a single location that is structured and easy to search. If you are laying tile on floors that are wavy or out of level, self-leveling underlayment is a great solution. Kerdi can even be installed over drywall. For the floor I make a dry mix mud base and then the Kerdi membrane. x 48 in. I appreciate your help and your quick response. I think the first one I used was cheap and that was part of the problem. Since KERDI is impervious, it does not deprive the mortar of its moisture. Needed to interject a little "amateur humor. While cement board and grout are not waterproof, Kerdi is and can even be directly installed over drywall. I would fear leaks in all corners of this shower. Cut the Kerdi membrane to size using a utility knife or scissors. #3 This is a DIY site. Installation instructions vary depending on the type of Kerdi membrane being used, but typically the membrane is applied directly to a clean, dry plywood surface that is free from dust, dirt, and other debris. Can I install Kerdi board just on the walls of my shower and use a PVC membrane on the floor? ! 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. As far as the tile/prep work, you are right that he is shifting the blame. Tile Backer Board Breakdown - DIYTileGuy Can you put KERDI over regular drywall? - remodelormove.com Is it suspicious or odd to stand by the gate of a GA airport watching the planes?

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