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is the contractor creating a waterproof schluter-kerdi shower? "thanks in advance :-) I know so little about this stuff, but when I watch videos (made by schluter-kerdi) everything looks so tidy and perfect - maybe that's not realistic'''" - Lisa Jasper It should look better than that and it's hard to tell but the wall stud spacing looks extreme and more than 16" I could not see if the screw heads where covered in the photos and in the one picture you can see that the screw and washer fitting where not covered. Seams can be constructed by overlapping the edges of the KERDI 2" (5 cm) using Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar, or by abutting the edges and covering the joint with KERDI-BAND using Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar. in tiled-under sink applications to distribute the pressure of the fixture hardware on the underside of the assembly. I accidentally poked a hole through the Schluter-KERDI while installing the membrane. There are two methods to seal KERDI-BOARD to a bathtub. It consists of an extruded polystyrene foam panel, with a special reinforcement material on both sides and fleece webbing for effective anchoring in thin-set mortar.KERDI-BOARD can be used in a multitude of interior applications. Connect and share knowledge within a single location that is structured and easy to search. Hopefully photos will help explain. I had intended to use vinyl corner bead for those transitions. What's the difference between Sheetrock and drywall? Not sure what to do for the ceiling since there won't be any tile. The membrane is subsequently cut to match the niche opening. Prior to setting tile, wait 24 hours to allow for final set of the mortar before testing to ensure waterproof performance of the assembly at seams and connections. Latex-modified mortars must dry for the polymers to coalesce and form a hard Why should I use the Schluter-Shower System? Where these two meet, what is the proper way to finish it so it's a nice corner? Do not install the door on this transition. Certainly not to that extreme just a example. Consult glass tile manufacturer and Schluter-Systems for more information. Your goal is to have a sealant joint from surface to waterproofing. KERDI has been evaluated according to the Standard Method for the Testing and Evaluation of Volatile Organic Chemical Emissions from Indoor Sources Using Environmental Chambers, Version 1.1 for California Specification 01350 and found to comply with the VOC requirements. The corresponding QUADEC or RONDEC profiles are installed with Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar in conjunction with the tile. Schluter-KERDI-BOARD over wood or metal framing. Is there a solution to add special characters from software and how to do it, Styling contours by colour and by line thickness in QGIS. 2. If you have a pic I'd love to see it. If you would like to change your settings or withdraw consent at any time, the link to do so is in our privacy policy accessible from our home page.. Again, this must be evaluated in accordance with the building specifications. Complete bathtub and shower base surround kit, Screws and washers for fastening KERDI-BOARD panels to stud framing, Waterproofing strip seals abutting joints of membranes and building panels, Vertically grooved building panel to create curved elements for tile, U-shaped profile for finishing partition walls and shelves, Angle profile used to stabilize KERDI-BOARD structures, Anchors used to stabilize KERDI-BOARD panels, Contact us: 888-472-4588 If you must tape Schluter-KERDI over Solid Backing for Walls, Scott McGillivray on Waterproofing Principles using Schluter-Systems, How to Waterproof Connections to Fixed Building Elements. Hi - My wife wants tile in the shower . Regarding the corner bead, you can use one from any company. I circled one area, but there are lots of these edges." - Lisa Jasper The Kerdi band should be smooth and flat - not wavy/ "3) there is no membrane of waterproofing on the hardboard across from the "wet wall" after 5 1/2 feet up. @thisisnotadrill Slow and steady. Place spots of thin-set mortar on the KERDI-BOARD panel or substrate in intervals of approx. I am actually very proud of how well it came out, being my first ever vertical tiling effort. The shelf may be raised at the back to create a slope, or the tile may be set on a slope, to prevent water from pooling in the finished application. If the transition features Kerdi board slightly overlapping drywall, it wont be level. I also did corner shelves like that, but the slightly elongated schluter ones. (Wear a dust mask and eye protection while sanding.) The only problem that would have occurred is if the seam had been left open. x 38 in. Butt vs Tapered Drywall Joints: Which Is Best? Hey thanks for asking! You basically want to create a dam so that water does not continue under the glass via grout and mortar. Better yet is to hone your skills so you apply just the right amount of mud reducing the amount of sanding necessary. 3. Gypcrete Repair In A Condo (Detailed Guide). is that because water doesn't really hit that area?" - Lisa Jasper That's pushing it but should be fine. Take modern bathrooms, for example. Thanks in advance for lending your expertise. The reason this seam ought to be covered is so that it can create an anchor or support for the Kerdi band we are going to install later. Fastener locations must coincide with mortar spots. @thisisnotadrill That was one 24" tile I cut in half for that. I will just end up painting it. If multiple KERDI-BOARD panels are required to create the desired partition, the panels must be arranged horizontally with the joints sealed using thin-set mortar or Schluter-KERDI-FIX adhesive. KERDI features a modified polyethylene (PEVA) core with non-wovenpolypropylene on both sides to anchor the membrane in the thin-set mortar. Here is how you should go about it. For inside and outside corners, adhere pre-formed KERDI-KERECK-F corners. 2. Large format (any edge over 15") will not matter as the mortar setting bed will be thick enough. We Want to See It! Manage Settings Repeat this process until the entire board is installed on the framing. It is not necessary to tape the joints between drywall panels before installing KERDI. You need to use a fiber mesh tape and a liquid waterproof membrane over the seams and corners any of the screwheads but the rest of the field is already waterproof and textured to except tile. Countertop edges may be finished with the KERDI-BOARD-ZC brushed stainless steel U-profile and corresponding Schluter-QUADEC or Schluter-RONDEC, RONDEC-CT, or RONDEC-STEP profiles. If you plan on finishing the crack, tape and mud it like any other sheetrock joint, and bring your tile as close as possible to that seam. The top two are the same model Shelf-E squared off and the bottom is a Shelf-E triangle for my wife to put her foot to help her shave her leg. If you find yourself dealing with an open seam between Kerdi board and drywall, do not be tempted to tile over it. Yes, you can, but it will be expensive and time-consuming. Your last post has me a little concerned about moisture traveling from the top of the pony wall, down the outside, which would obviously be very bad. Here's a link to the tile I got. 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. With heavy coats, this can require overnight drying, but with light coats in arid weather conditions, drying may take just an hour or so. I can only provide advice according to TCNA standards. KERDI-BOARD can be mounted vertically or horizontally on wood or metal framing with screws (i.e. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. The other side with drywall should be moisture free. @mrb_1 - That is the correct method. Schluter-KERDI-BOARD is a multifunctional tile substrate and building panel, which can also be used for creating bonded waterproofing assemblies with tile coverings. But you will incur an extra cost for their services. Will this happen on all showers? Maybe I'm over thinking this and I can just use a corner bead with thinset and move on? First Kerdi can be installed on drywall or cement board. Honestly, most pros leave this out. Its a walk in neo angle job, no door, just a curb to step over. Once dry, give the surface another light sanding. Apply the panels to the wall and firmly press them in place to ensure full coverage. Let the compound dry overnight, or longer if necessary. There are special corner drywall knives made for this purpose, but you can also apply compound and cover the tape using a standard 6-inch wallboard knife. $15.40. In Stock. Open-ended partition walls can be further stabilized with the corresponding KERDI-BOARD-ZA/-ZB U-shaped profiles. And without using up more time, proceed to step three. I will just end up painting it. Apply thin-set mortar to the substrate using a 1/4" x 3/16" (6 x 5 mm) V-notched trowel or the KERDI-TROWEL, which features a 1/8" x 1/8" (3 x 3 mm) square-notched design (Note the open time of the mortar). By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. how was it to work with that large format tile on the walls? The sanding dust, while not toxic, can irritate lungs and eyes, so it's important to wear a dust mask and eye protection while sanding. All joints of KERDI-BOARD panels must be sealed with KERDI-FIX or thin-set mortar. In general, it is recommended that the tile be at least 5/16" (8 mm) -thick and extend approximately 1-1/2" (38 mm) beyond the fixture hardware on all sides. Yes uphill also. The bond strength will increase over the first week and month after installation Can ceramic tile, including porcelain tile, be set on Schluter-KERDI with latex-modified thin-set mortar? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Please note that its impossible to avoid an overlapping seam in this scenario. In case of outdoor storage, protect the material from direct sunlight and weather exposure. These are usually pretty specific to the surroundings. Depending on which type of purple drywall you choose, a 4- by 8-foot panel typically costs between $15 and $60 (high-impact and sound-breaking options are available). Cover the joints with KERDI-FLEX. The pan area is recessed down to the joists which was no picnic with the engineered I joists. Please refer to the Schluter-Shower System Installation Handbook for guidelines on waterproofing showers, steam showers, and tub surrounds.Limitations. I expect that you will install glass panels. NOTE: (Not in the book) I have used expansion profiles such as Schluter BWA and set that into the sealant for a clean finish look instead of a sealant joint at the surface.. The corner bead will help strengthen the transition between these two materials. 5.0 out of 5 stars 2. This keeps the room looking simple and unified. If you have found yourself in the above scenario, here is an in-depth guide on transitioning from Kerdi board to drywall. we had a similar situation. If the finish doesn't quite meet the smoothness test, dont be afraid to apply another thin layer of mud. This can be achieved by sandwiching the panel between adjacent KERDI-BOARD panels, fixed building elements, etc. View Full Version : Kerdi board / Drywall outside corner. Part of the taping and mudding process includes sanding the dried compound (mud) to smooth the edges, For skilled professionals, sanding is minimal, but DIYers may find that sanding is surprisingly complicated and messy. No, the KERDI membrane does not have a front/back to it. Why is it so easy to peel it off the wall today? Tile will go right to that. Certain moisture-sensitive stones, e.g., green marble, or resin-backed tiles may not be appropriate for use in wet areas or may require special setting materials. Sure beats the (in my opinion) dated look of those big bulky tile/carrera corner shelves. There will be a schluter deco sg (SG100AE12) channel in the middle of the top of the pony wall, embedded in the tiled top for the glass panel. Then painted the caulk and I was good. The tiles can be installed immediately using Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar. Additional material may be removed from the underside of the KERDI-BOARD to allow installation of the fixture hardware. Larry.. The problem here would be that there wont be an anchor point for the Kerdi board strip to be attached to. How do I perform one on the Schluter-Shower System? Tiles can be installed directly over KERDI-BOARD using the thin-set method. My floor tiles are 2" x 2"." - Lisa Jasper No - you can not use Kerdi Board on the floor. Please call Schluter-Systems How do I install the prefabricated shelf in the Schluter-KERDI-BOARD-SN shower niche? Make sure its bonded and well attached to the drywall mud, and thats it. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. @Jonathan Gunnell Yeah I would recommend having the factory drywall edge covering the edge of the kerdi board if you can. When covered over with another coat of taping compound, the corner will be perfectly smooth. Houzz Call: Have a Beautiful Small Bathroom? California Specification 01350 is referenced by various green building standards and rating systems. Ceramic Tile Advice Forums - John Bridge Ceramic Tile > Tile & Stone Forums > Tile Forum/Advice Board > Kerdi board / Drywall outside corner. @thisisnotadrill Sorry, hope this time it works. Your real issues are the lack of proper corners on this shower. Apply the membrane over the wall and embed into the mortar throughout its entire surface to ensure proper adhesion. It can be cut to length with tin snips, then simply pressed into a corner that has been coated with taping compound. What do you think? This may be performed by routing a section from the top of the KERDI-BOARD in the area where the fixtures are to be placed. Once the countertop is tiled and grouted, holes may be drilled through the assembly to fit the fixture-mounting studs. As good as I could get it. You will know that the compound is dry when it all lightens to a uniform, white appearance. You should also not forget that your transition features Kerdi Band, which is waterproof. If so I would talk to tile company and ask if they have edging in this style. The walls were easier because I had tile wrapping around the corner so I just taped and thinset those and tiled overtop. It's been a 'long term' project after all. ".1) is is okay to use kerdi board instead of ditra on the floor? The size of your selected tile will determine if it's a issue that needs addressing. Then drill a single screw through the washer/KERDI-BOARD and into the stud. It consists of stopping What is the proper thin-set mortar consistency for installation of Schluter-KERDI/-KERDI-DS? The excess weight of the door can make it weaker. Normally I would have put in a metal corner trim but needs to go behind the tile. b. RONDEC-CT and RONDEC-STEP profiles are installed with Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar in conjunction with the tile. Drying time for taping compound will vary, depending mostly on humidity levels. Otherwise, I'll have to try to mud over the foam edge of the Kerdi board in order to paint it and blend it into the drywall. Screws may be placed between adjacent panels such that the washers fasten both panel edges. Panels from a thickness of 3/4" (19 mm) may be used for building shelving. Are you going to tile above the current tile and ceiling. Tiles can be installed directly on KERDI using the thin-bed method. Keep in mind you did use foam board. Determine desired location and trace around the outside of the KERDI-BOARD-SN flange, making sure the lines are level and plumb. Install KERDI-SEAL-PS pipe seals at showerhead, body sprays, etc. Then proceed to apply the Kerdi Band and ensure it touches both sides of the transition. Seal the seams between the niche and walls using KERDI-BAND with Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar ensuring a 2" (50 mm) overlap in all directions. I had been planning on doing the same thing you mentioned as your original plan early on in this thread. Use of KERDI-BOARD on wood or metal framingMinimum board thickness = 1/2" (12.5 mm) for studs spaced at 16" (40.6 cm) o.c. About this item Schluter KERDI-KERECK-F - 4 mil Thickness - Outside Waterproofing Corner - Qty: 2 Apply thin-set mortar to the substrate and/or onto KERDI-BOARD with a notched trowel. A chairrail, bullnose, double bullnose could all look good here. It will be subsequent layers of mud applied with a wide wallboard knife that raises out the joints so they are perfectly flush with the surrounding panel areas. To achieve this break tape off the substrate at slope point to prevent setting mortar from shower floor to continue onto the bath floor. The kerdi wall will have tile and a schluter profile along the edge. The selected screws must be of sufficient length to reach a depth of at least 3/4" (20 mm) in wood studs and at least 3/8" (10 mm) in metal studs. For most installations of KERDI-BOARD, tile can be installed right away. The best approach here is to use a corner bead, preferably the one from Schluter. A water test is a quality control check performed on any shower installation before setting tile. Generally, Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar is used. @Charlie Baum thanks for the quick response! Houzz Call: Show Us Your Hardworking Studio! Note: Please refer to the Walls and Countertops Profiles data sheet for additional information on profiles, including installation instructions. No. coarse thread wood screw for wood studs and self-tapping for metal studs) and corresponding KERDI-BOARD-ZT washers. Not sure if you're in the PA/DE area but I opened an account with them and paid $5.99/sqft instead of the advertised price. Please refer to the Schluter-Shower System Installation Handbook How long do I have to wait before I can install tile on the Schluter-KERDI membrane? Now you will have to go with some kind of bullnose or trim piece, much like you would trim out a door. I really enjoyed the large format on the walls for a couple reasons. Is the only real solution to use a corner bead? But wouldn't you want a corner bead there to protect that corner? Doing final coat of mud now. But it wont be structurally strong. The best answers are voted up and rise to the top, Not the answer you're looking for? As long as the transition has been perfectly constructed, you can tile over it. Spot-bonded KERDI-BOARDMinimum board thickness = 3/8" (9 mm)1. I had a similar situation where the backer board extended a few inches past my planned tiling edge in my shower. That's complicating an outer corner transition to drywall that covers the outside of a wall between the shower stall and tub on the other side. My shower is constructed from kerdi board. Schluter Systems: Kerdi Board Shower Bench (Triangular 16"x16"x20") . Water will migrate by capillary action through the grout and tile setting mortar. For showers and bathtub surrounds, KERDI must be carried to the height of the showerhead at minimum What size notched trowel should I use to install Schluter-KERDI? From there, you can tile or paint over the transition and finish your project. Yes Schluter provides them as do many other manufacturers. For finishing inside corners, consider using prefabricated corner bead. Air bubbles must be avoided. But taping and mudding can be a frustrating job, so it's important to understand the process well. For corners, there are also corner bead products available, which have paper flanges attached to a metal bead. I was thinking of the kerdi board overlapping the edge of the drywall. It looks like you have Kerdi installed on the floor and not Kerdi Board. I love the tile choices. The substrate must be clean, even, and load bearing. One of these? It's been three years and there is no cracking or any problem with it. What did you decide to do with the outside corner on the right side of the picture? And the best way to do that is by cutting a small piece of the Kerdi board and fitting it on that seam. Woot. . How to finish tiling an outside edge for a shower? If you use both Kerdi board and drywall, the part with the latter material wont be heavily exposed to moisture. FREE delivery Fri, Dec 9 on $25 of items shipped by Amazon. Hookless 71-in W x 74-in L White Solid Mildew Resistant Polyester Shower Curtain and Liner Set. Not sure in what context of a bathroom capillary break applies. I do wish one or two of the full tiles was oriented differently, but when you're right up close to 24" tile it's hard to see the big picture. https://www.schluter.com/schluter-us/en_US/Profiles/Movement-Joint-Profiles/Perimeter-Joints/Schluter%C2%AE-DILEX-BWA/p/DILEX_BWA. This is confusing since Kerdi Board has no Kerdi on it. Avoid the temptation to over-sand, as it is easy to sand down into the tape. Press KERDI fully into the bond coat. But putting large tiles up made me very grateful I spent the extra time and effort to make the walls plumb and square. Similar to placing a sponge in water. ncdu: What's going on with this second size column? Insert the niche and fasten to the studs using wood or metal screws and KERDI-BOARD-ZT washers, placing the fasteners along the seam between the KERDI-BOARD and the niche. 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. Glass guy is coming next Monday. Butter the sides and back of the shelf with Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar and solidly embed it in the niche, resting on the previously installed tile. i could post a pic if that helps Comments (34) Charlie Baum Original Author 2 years ago The floor is not as great as I would like, there's a little lippage between pan tiles and floor tiles but overall I'm happy. Step 1: Cover the Seam Between Kerdi Board and Drywall. 2. The maximum allowable on-center fastener spacing is 12" (30 cm) for walls and 6" (15 cm) for ceilings. You can rely on drywall mud to hold the Kerdi board when it cures. I hope you made the guy flood test his work prior to tiling the shower floor. Do "superinfinite" sets exist? Smooth the surface and feather the edges as best as you can by pressing it down with a drywall knife. This knife should be at least 12 inches wide; pros may use even wider drywall knives. I am all ears though. Thin-set mortar takes time to cure. The possibility can be eliminated. We and our partners use data for Personalised ads and content, ad and content measurement, audience insights and product development. Fasteners are installed after the thin-set mortar has hardened.Note: See section Waterproofing on the use of KERDI-BOARD in bonded waterproofing assemblies. Choose a notched trowel to match the tile format, and back-butter the tiles, if necessary, to attain full coverage. With the available panel thicknesses of 3/16", 3/8", 1/2", 5/8", 3/4", 1", 1-1/2", and 2" (5, 9, 12.5, 15, 19, 25, 38, and 50 mm), KERDI-BOARD allows the installer to prepare and create a broad range of substrates and building elements for the installation of ceramic and natural stone tile that are flat, level, plumb, square, and dimensionally stable. My issue with the corner bead was build up of The corner bead under the schluter profile, throwing off my tile plane. It looks good. I will not be tiling the ceiling. Calculate your building panels for a quick and easy waterproof installation. This grout joint is the location for the capillary break. Is it known that BQP is not contained within NP? Dining room wainscoting/board and batten help. Interested to hear your strategy. The tiles can be installed immediately using Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar. Including flashed up the walls behind base board actual water damage is not a concern. Thank you, very kind words. I ended up thin setting corner bead and then making it pretty with joint compound. You have worked with Kerdi board and are fully aware how rigid it is NOT. Kit includes: 8-1/2 in. Find some existing tutorials and project documentation videos to learn how-to get the best out of our products - for more fun in your life, start now! Cut and remove the KERDI-BOARD such that the niche will be supported on both sides by the studs or other wall framing. There wasn't enough of a gap to need to mud it, the caulk did it. KERDI-BAND is also suitable for sealing connections to fixed building elements such as door and window frames. We left about 1.5" of drywall on the inside edge of the corner. Schluter-Systems requires the use of Schluter SET , ALL-SET , FAST-SET, or an unmodified thin-set mortar meeting Can I use a premixed thin-set mortar to install Schluter-KERDI and tile in my shower? I am extremely pleased with how it turned out. As you can see from the guide above, its a straightforward procedure, and you dont need any unique tools or equipment. Apply the thin-set mortar using a 1/4" x 3/16" (6 mm x 5 mm) V-notched trowel or the Schluter-KERDI-TROWEL, which features a 1/8" x 1/8" (3 mm x 3 mm) square-notched design. @thisisnotadrill Curbless. Hey folks, bathroom reno coming up soon. Its possible because the Kerdi board can be installed over drywall. It is greatly appreciated. Then tile. I installed my Schluter-KERDI membrane yesterday. Continuing Education for Architects & Designers. There should be a very thin layer of compound over the tape at this point, but you will still clearly see the tape through the mud. PDA. How do you finish drywall before painting? Remove all surface contaminants from the substrate that may weaken the bond. Here are a few tips on installing Kerdi. Set tile up to that line on the back and sides of the niche. Whether you are building or renovating a shower, you are obviously working with a budget. With this application from a wide knife, the joint areas will now be raised up nearly flush with the faces of the wallboard panels, and the tape should now be hidden under the compound. Waterproofing with KERDI-BOARD Where waterproofing is desired, the joints and corners of KERDI-BOARD in the area must be sealed with KERDI-BAND using Schluter-SET, Schluter-ALL-SET, Schluter-FAST-SET, or unmodified thin-set mortar. You can even paint over it. Note: See section Waterproofing on the use of KERDI-BOARD in bonded waterproofing assemblies. Not to toot my own horn but the shower walls came out awesome and I'm really proud of them with 24x24 polished porcelain tiles and schluter jolly profiles as well as Delta hardware and schluter corner shelves. 4.6 out of 5 stars 154. Even if you apply the drywall mud, it will be evident that the two panels were incorrectly joined together. Absolutely. 4. Send us an email: , Using a Prefabricated Shower Tray and Ramp, Features sealed inside corners for effective waterproofing, To enhance its appearance, frame the niche using select Schluter, Larger sizes include a prefabricated, adjustable KERDI-BOARD shelf. Here's a pic of the shower stall. Whether using powdered drywall compound or a premixed product, give the mud a thoroughstirring before using it. Ensure that its fastened to the wall. 3. Butthey extended the cold water line to the toilet so I need to do some rerouting of that water line down below the subfloor and then back up to the original supply location. Get daily tips and tricks for making your best home. If you had tiled over it, water could leak past the Kerdi board, and your waterproofing attempts would have been futile. You can go ahead and apply drywall mud on the overlapping seam. INCREDIBLE. Remove all surface contaminants from the substrate that may weaken the bond.2. Once you install KERDI over the drywall panels, they will be completely protected from the water and vapor in your tiled shower. The purpose of drywall mud here is to fill in the groove on the seams. 1. "..2) the kerdi band isn't stuck flat -- the edges in some spots are wavy. Drywall tape is available in two types: paperand fiberglass mesh. I am just not sure how to build this. Remove any air pockets. Any suggestions? 5. The KERDI-BAND must overlap panel joints by at least 2" (50 mm). and KERDI-SEAL-MV at the mixing valve. Sep 10, 2017 Generally your finish tile, whether bull nose or Kerdi strip will overlap onto the sheetrock, forming a seam of its own. As a general rule, either paper or fiberglass tape will work for straight seams, but inside corners are best covered with paper tape. Kerdi-Board panels, 2 pipe seals, 1 mixing valve seal, 1 - 5 in . Apply KERDI-FIX to the inside vertical surface of the KERDI-BOARD-ZC profile and slide the profile over the edge of the KERDI-BOARD, pushing it tightly against the panel. Sheetrock is generally viewed as a quality product, and it comes in different forms, including moisture-resistant and sound-dampening panels. Finishing drywall is not a hard process for experienced drywallers, but for DIYers it can be tricky to get it right. What I'm specifically asking for in this case is how to finish the top outside corner where drywall meets CBU (the area where there isn't any tile). A special drywall sanding block can be mounted with fine-grit drywall sandpaper, and it accepts a threaded pole to allow you to easily sand high up on walls without a ladder. Find some existing tutorials and project documentation videos to learn how-to get the best out of our products - for more fun in your life, start now! If you are using paper tape, it must be embedded in a layer of compound, and thus the process takes slightly longer than with fiberglass tape. I was going for a marble slab look and that was the best way to go about it.