kerdi membrane over cement board

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. The gridlines printed on the surface are beneficial for the installation process, also allowing for quick, neat cuts with a utility knife. No, that doesn't sound right. One thing I do like fibercement (Hardie) for is when I need thin strips of cement board. Kerdi board is a kind of waterproofer because these kinds of boards are made of XPS foam. When installing KERDI with . We recommend our users to update the browser. It also helped me to work in smaller sheets. An extra layer of thinset is then added to the surface of the cement board to adhere the tiles in place. Why do you think each board should be able to move at all let alone independently? Underlayment is designed to smooth out uneven areas of the subfloor and form a rigid layer that prevents the flooring from bending. It looks like you have Kerdi installed on the floor and not Kerdi Board. This will help protect the cement board from water damage, and is often a specific type of coating designed for use with cement boards. Yup! Glass mat gypsum board is a better choice. 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. Then you can apply a thin layer of KERDI-FIX to the board, the membrane over top, and use a rolling pin to press it down and ensure a secure bond. The big issue with cement board is that the thinset will skin over really quickly. If your going to do the job do it right, and give professional advice pls. There is a product called Kerdiboard you might want to look into. We sponge water onto the cement board. Kerdi Questions and Answers - Kennedy Kitchens & Baths GoBoard Vs. Kerdi For Your Shower: In-depth Comparison We use a pump action garden sprayer and its usually dry by the time we clean the sprayer. The bag says Mapei floortile mortar, it was the only unmodified thinset at our hardware store. Je peux rejeter les cookies non essentiels en cliquant sur Grer mes prfrences . When applying the primer, make sure to cover all surfaces thoroughly, as these will be completely covered by the KERDI membrane. If you want to go to the extra effort of putting the membrane over drywall, there is no need to use greenboard. I want to mount a cast iron bathtub, but not pull down my 1905 plaster and lath. This is a bit difficult to answer as it depends on the particular application for the floor system. Firstly, it is important to ensure the wall is adequately prepared and that it is smooth, flat and free of defects. Once its cleaned, use caulk to seal all of the seams where the cement board meets the walls. Kerdi Board is expensive, but I can justify it because it saves time, and it's a joy to use. 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. 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. And how do you keep too much water from interfering with the adhesion in the second scenario?Thanks!! Your email address will not be published. There is no cutting or fitting of boards, and a mortar bed is good for leveling and flattening uneven or out-of-level floors, which are common in old houses. Also - use a good thinset. We tried adding water to the thinset, we tried using a larger notch trowel, but nothing seems to make the Kerdi stick. There is definitely skill & planning required to doit right. We like that the Kerdi membrane material installs easily over almost any substrate, including standard wallboard. Schluter Kerdi 108 Sq Ft Waterproofing Membrane - amazon.com 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.' 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? #3 This is a DIY site. 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. Modified thin-set mortars must dry for the polymers to coalesce and form a hard . Can Kerdi membrane be installed over painted drywall? Hi David. Once the adhesive has been applied and has had time to properly cure, then the KERDI membrane can be applied to the wall. I used this to seal a 3 1/2 by 6 1/2 foot shower with 7 foot walls. 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. Is this overkill? Take care to cut the KERDI membrane to the appropriate size and apply it to the wall, ensuring that it is properly adhered and that the edges are sealed with KERDI sealant. Kerdi Board vs. Cement Board: What Are The Major Differences? We were using a 3/16 x 5/32 trowel, probably to small. Actually if you watch any pros work (not on crappy shows) on TV you will see them use backer board 99% of the time. 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 look at ceramic tile as a lifetime-of the house-product, so I use the best material for the job.I prefer to use cement board as the substrate with the Kerdi on top. With so many different types of underlayment to choose from, it can be hard to decide which is best for your project. So long as the seams and joint areas are properly prepared, the panels can also provide waterproofing. When it comes to applying KERDI, however, it is advised to use a regular thinset that includes portland cement as its main component. 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. First, it's super lightweight compared with the rest. Once all that is completed and the Aquadefense has dried, you can install your tile with a polymer modified mortar meeting the ANSI requirements of A118.4 or A118.11. Bathroom closets are often catch-alls for anything and everything remotely related to self-care. I like to use a garden sprayer to keep the thirsty Kerdi wet. Another advantage is that the polyisocyanurate core of foam boards is waterproof. I just a few weeks ago put kerdi on top of hardi-board in my shower and it was PAINFUL! We are DIYers who have already remodeled one bathroom successfully, but this is our first time using The Schluter shower system. Best substrate for kerdi membrane - nsbu.treviso-aug.it Your real issues are the lack of proper corners on this shower. Cement board and grout are not water proof, if there's Kerdi no moisture is ever going to be able to get behind it. Retired Moderator - Theatre Guy (and computers). The shower is ready for tile. Can be cut to size easily using a utility knife. Contact us: 888-472-4588 Or will the Kerdi membrane (with seams taped with kerdi band) prevent each board from moving independently? KERDI features a modified polyethylene (PEVA) core with non-woven polypropylene on both sides to anchor the membrane in the thin-set mortar. The best answers are voted up and rise to the top, Not the answer you're looking for? True cement board (Durck, Wonderboard) is my first choice as a tile or Kerdi backer. Kerdi board vs. Membrane vs. Other for Shower - DIY Home Improvement Forum rev2023.3.3.43278. Why are Suriname, Belize, and Guinea-Bissau classified as "Small Island Developing States"? The niche' intermediate shelf isn't actually attached, to enable specific placement for each unique tiling application. RedGard, on the other hand, is a liquid waterproofing membrane made by Custom Building Products. Is it plausible for constructed languages to be used to affect thought and control or mold people towards desired outcomes? Seems like I've been using the full measure of water the bag calls for, plus about 10%.-50 lbs of thinset at a time is too much for an amatuer. Caulk the gap. 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. Press the Kerdi Membrane into the Thinset Mortar with firm, even pressure to achieve full mortar coverage. kerdi membrane over osb 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. I will say that to is easier to put the membrane over drywall than cement board. To prevent those movements from transferring to the tile floor, consider installing an uncoupling membrane between the concrete and tile surfaces. The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece. I guess that why it was so frustrating that cement board is just sooo thirsty. 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. Plus, if you use the mold and moisture resistant drywall, it will be extra insurance against mold. The best answers are voted up and rise to the top, Not the answer you're looking for? Yes, it is possible to put Kerdi over regular drywall. Cement board is a good, reliable backer board that works well on both floors and walls. As a contractor, I have been using Kerdi since it came out. DensShield is one common brand. DIYers on this forum seem to have nothing but problems with Hardi. What are the differences between "paperless drywall" and "cement board"? Schluter Kerdi on regular drywall - GreenBuildingAdvisor Its essential to protect surrounding wall and floor surfaces from water or moisture damage that can occur in these areas. When I do another shower I'll use real cement board, not Hardi-board. Wedi Board vs Cement Board vs Kerdi Board - The Ultimate Home Living Blog Putting this stuff on walls is difficult and time . It could take longer if the space is particularly wet or humid. That's the way us "Tile Guys" do it all the time. Is it Sinful to put Kerdi over Hardi-backer? - Houzz Your Get free, zero-commitment quotes from pro contractors near you. It is also widely available and a relatively inexpensive option approximately $10 for a 3-foot by 5-foot sheet. The great thing about Kerdi Board is that it is lightweight and easier to maneuver. We installed cement board on the walls, and today when we attempted to apply the Kerdi membrane we could not get it to adhere. Continuing Education for Architects & Designers. Make sure the floor is level in the shower. It is designed to form a waterproof layer between cement board and tiles, helping create a watertight installation. They are available in thicknesses of 3/16, 3/8, 1/2, 3/4, 1, 1-1/2, and 2 (5, 9, 12.5, 19, 25, 38, and 50 mm). 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? Think about movement. Making statements based on opinion; back them up with references or personal experience. Can you put KERDI over regular drywall? - remodelormove.com No bulges either, but definetly no thin spots.-Not paying attention to the direction of the comb. Allow the adhesive to cure for the amount of time recommended by the adhesives manufacturer. First Kerdi can be installed on drywall or cement board. Here are the fundamentals of tile installation over cement board. Kerdi Membrane Over Greenboard (Is It Recommended?) What is the proper substrate to use on tiled wall? 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. Additionally, all seams should be sealed with Kerdi Fix and covered with fleece. We tried soaking the cement board and applying the kerdi in small sections. Set ceramic and stone tile over the KERDI membrane with unmodified thin-set mortar, including large format tiles. On the other hand, a Schlter system offers improved thermal insulation, which can help to reduce heating costs. Been clankin' away at this computer for a couple of hours now, guys. If so, that means breaking up the floor pan. if you go with vapour barrier, then cement board. This is confusing since Kerdi Board has no Kerdi on it. This liquid waterproofing solution does more than keep water away, it also promotes tile adhesion and prevents cracking. Kerdi membrane over drywall in shower - qkfb.recidivazero.it 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). Why does drywall work in a Kerdi Shower? - Terry Love Plumbing Advice 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 youre sure that the membrane is completely dry, you can then move forward with tiling. If you want added info there's an old Kerdi thread here. What is a word for the arcane equivalent of a monastery? If any is found, wait a few more hours and then re-inspect. Anytime Mongo. Once its applied, the last step is to follow up the waterproof coating with a waterproof sealant. Kerdi can be installed first on drywall or cement board. It worked well - just like wallpapering. Cement board, Wedi board, Kerdi board, Hardibacker, Densshield, Durock, Permabase, or Wonder board . This will prevent water from entering from behind the membrane, and will provide a more secure waterproof layer. What can a lawyer do if the client wants him to be acquitted of everything despite serious evidence? Using modified thinset on KERDI can be tricky and in some cases, it can cause issues. Using self-leveling underlayment takes careful prep work. Thanks Paul! If you preorder a special airline meal (e.g. The major drawback to cement boards is their weight, as they are incredibly heavy and can be difficult to cut. If you are laying tile on floors that are wavy or out of level, self-leveling underlayment is a great solution. ;). The problem is on the back side of the drywall, which is not protected. 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. Kerdi Vs. RedGard (Compared) - Build It Fine First, its super lightweight compared with the rest. Just wondering how effective is the tile on kerdi membrane vs the traditional cement backboard where tiles are glued directly to the drywall? This allows the cement to properly hydrate, resulting in To ensure the floor is clean, wipe it with a wet sponge. Gettin' a little delirious. 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.