Get your 2 x 4 (which is actually 3 1/2 x 1 1/2 - economy I guess) and set it on top of your drain (Figure 1). Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. DITRA is a polyethylene membrane with a grid structure of square cavities, each cut back in a dovetail configuration, and an anchoring fleece laminated to the underside. The hyperbolic space is a conformally compact Einstein manifold. This can be concrete or closed cell foam. A major perk of site-built shower pans is that they allow the installation of custom tile, stone, or other aggregate floor surfaces. in the area of concern. Note: While the image below shows a concrete subfloor, this is also achievable with a wood subfloor. The system can also be customized with floor heating cables to create a warm, luxurious tile floor. Whatever the product, the liner must extend at least 2 in. 2) The pre-slope under the pan liner channels any water that gets through the tile and grout into the weep holes in the drain assembly. If you use the DITRA and cover the seems that should be waterproof so there really should not be moisture getting to the subfloor. Generic Doubly-Linked-Lists C implementation. Would you ever say "eat pig" instead of "eat pork"? Designed specifically for ceramic tile and dimension stone installations, DITRA serves as an uncoupling layer, waterproofing membrane, and vapor management layer that accommodates moisture from beneath the tile covering. Different options and thicknesses of DITRA membrane are available to best suit the needs of your project. Thus, additional measures must be taken to protect wall cavities from water and vapor penetration. Installing an Acrylic Shower Pan in a Mortar Bed - YouTube One popular way to create a shower pan is to install a pre-fabricated polyurethane or fiberglass pan. If the subfloor is not flat and level, apply a self-leveling compound following the . In order to add support and reinforce the subfloor structure, you can add a secondary layer that the built up shower pan will sit on top of. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. How to Prepare a Floor for a Walk-in Shower The entire shower will be done with Kerdi. But you did not actually answer his question. or 40 mil. Before the liner is installed, a solid subbase must be installed to create a smooth and uniform slope to the drain. Bathroom Subfloor Thickness | DIY Home Improvement Forum I removed these and droped the 3/4 OSB subfloor only in the shower area. A subfloor is the layer at the very bottom of your shower pan. New blog post from our CEO Prashanth: Community is the future of AI, Improving the copy in the close modal and post notices - 2023 edition. It is where visible water will escape and limit the rise of water up the walls. Tiling Project Guide. Multifunctional building panels: Schluter-KERDI-BOARD, 4. While pre-fabricated pans are a great convenience for do-it-yourselfers, the traditional way of building a shower pan with tile on a mortar base allows maximum creativity. Based on the comments to this answer, updated answer: Since you're waterproofing the entire room, its not essential. This doubles as an anti-fracture membrane which is painted onto the surface of the concrete with a paintbrush or a paint roller. While the detail images below demonstrate options for KERDI-DRAIN, please note that raising the bathroom floor is also possible with KERDI-LINE. Connect and share knowledge within a single location that is structured and easy to search. common sense would dictate that the same minimum 1/4-in-12 slope is critical to keep bulk water moving. Counting and finding real solutions of an equation. What is the final thickness of a DIY shower pan? What is the difference between a shower tray and a shower pan? If your shower is not a square, and they rarely are, you still need to have the same thickness at the walls all the way around the perimeter. The first layer of deck mud does not have to be precise; it merely needs to provide enough slope from the outside edges of the shower to the actual drain for the pan liner to slope to. Should I use liquid water proofing membrane over a standard shower mud pan? 399K views 1 year ago Dry Pack mortar or Deck Mud, as it is called in California, is an important step in the construction of a tile shower pan. Actually will be basically a fully tiled wet room. Using KERDI-BOARD to build walls over stud framing in wet areas is an efficient alternative to using gypsum board. Field-fabricated shower pans (or receptors, as the code refers to them) have been acknowledged by plumbing codes at least as far back as the 1955 Uniform Plumbing code. Then another layer of deck mud is added on top of the shower pan liner. The preslope is laid on tar paper. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Shower curbs, which prevent bulk water from running out of the shower, are not required, but there are provisions for their installation when theyre included (and where they are incorporated, theyre typically roughed in before the subbase). Most homes will consist of a standard subfloor constructed of running boards laid over floor joists, a plywood layer over the running boards, or if on a first floor, the subfloor can be a concrete slab. Install the liner over a pre-sloped bed, as I explain here. How to Lower the Subfloor for a Handicapped Shower Pan The tileable covering support is placed flush with the top of the bonding flange and can therefore accommodate any thickness tile covering. Depending on the subfloor material, you will need to ensure it is sturdy enough to support the weight of a built up shower pan. Wood floors first need to be able to withstand the weight of a custom walk-in shower. 2. Then you have to waterproof the pre-sloped mortar bed with either a liquid applied membrane or a sheet membrane. Cut out the hole for the shower drain. DITRA-XL is 5/16 (7 mm)-thick and allows for ceramic tile application over single layer plywood/OSB subfloors on joists spaced at 24 (610 mm) o.c. Made of polyethylene, DITRA serves as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. The flange provides a water barrier to prevent water from exiting he shower during normal use, or in case of a "back-up". Thanks for contributing an answer to Home Improvement Stack Exchange! Hold the 1-by-4 rod on edge against the surface of the subfloor and move it across the surface of the mortar in a sawing motion. KERDI-BOARD can be installed both vertically and horizontally using the screws and washers in our hardware assortment. Therein the new sheathing would not run under the wall and the wall would be now supported by the blocking. Shower pan membrane typically comes in thicknesses from 30 mil (0. Prepare the Subfloor. Making statements based on opinion; back them up with references or personal experience. For a better experience, please enable JavaScript in your browser before proceeding. The question of whether the code requires a similar liner over shower seats often comes up, but the IRC offers no guidance here. Step 1: Reinforce the shower pan. With the trowel, taper down the mortar to the shower drain. If it comes apart, repeat the process. But remember, the code is a minimum standard and not a measure of fine home building. What does "up to" mean in "is first up to launch"? Second, since the surrounding framing and drain pipe are in place assuming a 1/2" subfloor, is my only recourse going to be to cut the base plates, take a 1/4" off the wall studs and extend the drain pipe ? Use the existing nails or deck screws as guides to determine the locations of the floor joists below the subfloor. When choosing your subfloor material, take into consideration how the thickness will effect the overall heigh of the built up shower pan in relation to your shower curb. Emily Estep is a plant biologist and journalist who has worked for a variety of online news and media outlets, writing about and editing topics including environmental science and houseplants. When choosing your subfloor material, take into consideration how the thickness will effect the overall heigh of the built up shower pan in relation to your shower curb. What is this brick with a round back and a stud on the side used for? tar command with and without --absolute-names option. Use only a little bit of water at a time to maintain a stiff, peanut butter-like consistency. What differentiates living as mere roommates from living in a marriage-like relationship? Point drain with integrated bonding flange. Specifically designed for ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout. Bases come in a variety of materials, from acrylic, molded stone, and fiberglass. Connect and share knowledge within a single location that is structured and easy to search. Mix it thoroughly with the trowel to remove any clumps. Uncoupling and waterproofing membrane: Schluter-DITRA. Waterproofing Corners: Schluter-KERDI-KERECK, 1. 1/2" is a bit thin to span that distance, although it should not be a problem with a concrete slab above it. The thickness of the subfloor for a shower pan depends on several factors, including the specific requirements of your local building code as well as the finished floor material you will be using. Run a thin bead of silicone around the perimeter of the drain. Whatever the drains shape and location, the sloped subbase is critical to moving bulk water from the shower floor, and the sneaky water that gets through it, toward the drain. Floor & Subfloor Thickness | Home Guides | SF Gate Remove the top section of the shower drain by unscrewing or unbolting it. 4. With lengths from 20" to 72" (50 cm to 180 cm) in 4" (10 cm) increments, KERDI-LINE can fit virtually any shower design. The code offers a number of choices for this application, from the time-tested but relatively outdated use of lead sheets and hot-mopped layers of asphalt felt to the common plastic liners used today. I plan on replacing some studs and sistering others. Your email address will not be published. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Toe-screw 24 blocks to the subfloor every 12 inches and 1/2 inch away from the line to allow for the thickness of the hardboard siding. Generally speaking, the subfloor should be a minimum of -inch thick for any wet application. I've never heard of doing this. No I would not apply water proofer to the subfloor under the shower pan (unless we are going to be waterproofing the entire floor it might be easier to just continue it under the shower pan). JavaScript is disabled. Note: While the image below shows a wood subfloor, this is also achievable with a concrete subfloor. Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. All shower trays feature integrated KERDI waterproofing and are designed specifically to integrate with the KERDI-DRAIN. Follow the Wood Underlayment installation guidelines as found in the Schluter-DITRA or Schluter-DITRA-HEAT Installation Handbooks for fastening guidelines. If you're creating a custom walk-in shower, you must put down a layer of what is known as the deck mud, which is a 2- to 3-inch thick layer of concrete. Ideally you would need to cut single, large pieces and screw them into the running boards or concrete slab. KERDI-BAND is a waterproofing strip used to seal all KERDI-BOARD butt joints, screw penetrations, and the connection between the KERDI-BOARD panels on the walls with the KERDI membrane laminated to the shower tray. For curbless showers without such a dam, the floor-level threshold at the opening serves the same purpose. in reply: 1) Lawrence Taylor - The subfloor is the first layer of plywood over the joists, which I lowerd about 1 1/2 inches by removing 2-by material that was put over these joints by the last guy who remodeled this bathroom. Cut notches into the floor joists to the permitted depth using a reciprocating saw, if no reinforcement is needed according to building code or plans. This video shows you one way to set the. If necessary, lift the pan or base out of the way and install additional deck screws or level a low spot. 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. Afterwards, a shower pan liner is installed on top of the slope bed, flattened and stretched tight across the shower pan and stapled into place roughly 6 inches up the wall studs. We benefit by helping you find what your looking for and are paid a small amount when a purchase is made on a sellers website we link out to. Where you have obstructions such as pipes, use one-by-six lumber or use a router to create a groove to accommodate the obstruction. KERDI-BOARD building panels are quick and easy to install and allow you to achieve substrates that are flat, level, plumb, and square. Send us an email: , Using a Prefabricated Shower Tray and Ramp, 1. Trusted, comprehensive guidance from the pros for a great-looking tile job in any room of the house. In such a high humidity environment, I'd remove the existing sub-floor and put in pressure treated plywood in the entire room. The Fora platform includes forum software by XenForo. It's about how it looks and how it feels underfoot. Get home building tips, offers, and expert advice in your inbox. Litigation and Insurance Claims Investigation Services. 9mm . Profile that forms a splashguard in curbless showers. KERDI-DRAIN features an integrated bonding flange to which the KERDI waterproofing membrane is adhered and forms a waterproof connection at the top of the tile assembly. Are you implying you would use pressure treated wood in the subfloor and not redgard it? Install Subfloor The subbase must slope 1/4 in. 1. How thick should the Mortar Bed for a Shower Pan Floor in a Shower? Learn more about Stack Overflow the company, and our products. Further, DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. Thanks for contributing an answer to Home Improvement Stack Exchange! We have to step up to go in shower!!! Otherwise, you must install sister joints before . This provides the bonding element for the concrete and gives it something to hold onto. in the area of concern. The studs were rotten, the subfloor was rotten, and the top of the joists (in some places) were weak and rotten. DITRA has a nominal 1/8" (3 mm)-thickness which minimizes tile assembly thickness. CTRL + SPACE for auto-complete. Subfloors provide the necessary support for the shower pan and prevent any shifting, settling, or warping in the future. Test fit shower pan drain housing into subfloor bore hole. Because they act as dams that can raise water level in the shower area, the top of an included curb becomes the benchmark for the height of waterproofing. The base of a DIY shower pan needs to be about 2 to 3 inches thick at the edges before the tile is added. Its important to not make a mess when filling the pan for the test, as a dry floor is necessary to ensure there are no leaks. He studied architecture at Taft Junior College. The curb is between two inches and six inches above the level of the shower drain. Check the subfloor area from left to right and from front to back to make sure it's level. What to use to flatten and prep wall before installing Schluter Kerdi membrane for tiling? Hardwood Flooring. Jan 21, 2021. Is it safe to publish research papers in cooperation with Russian academics? KERDI-DRAIN grates are available in four stylish designs and multiple finishes. Joists I'll likely epoxy and sister before installing new subfloor. It is normal to have a shower curb/dam. I think The Evil Greebo does bring up a good point, because this is a steam shower I would be even more concerned about mold developing in this humid environment. In most cases, the job is easier with the help of an assistant. After the sloped subbase is in, the liner can be installed. Asking for help, clarification, or responding to other answers. Prefabricated sloped shower tray: Schluter-KERDI-SHOWER-LTS, 3. But a shower pan isn't just about function. DITRA-XL is 5/16 (7 mm)-thick and allows for ceramic tile application over single layer plywood/OSB subfloors on joists spaced at 24 (610 mm) o.c. Can I set a shower-pan bed and install tile in one day? | Mapei Its strong. Place a full sheet of plywood onto the joists with the 48-inch end against the edge of the cutout where a floor joist runs below the edge. I ripped my old shower down to the studs and joists. Build a high border around the perimeter of the shower, about 1/4-inch below the tile top perimeter line. See Recessing the Shower Floor Technical detail here. This is especially true when remodeling at an existing subfloor. By clicking Accept All Cookies, you agree to the storing of cookies on your device to enhance site navigation, analyze site usage, and assist in our marketing efforts. Point drain with integrated bonding flange. Although curbless showers that were originally meant for handicap showers has become more popular and more in demand. The same answer, I presume, is applicable to a dry pack pan as well? The flange is a 1/8" thick, 5" high FRP composite MATERIAL that is designed to rise between the stud wall and the showers backer wall. Send us an email: , Using a Prefabricated Shower Tray and Ramp. Remove the subfloor material. Though you can make your own shower pan, our experts say this project is best left to professionals and experienced tile setters. The trays can easily be cut to size with a utility knife, or they may be extended with dry-pack mortar. However, if you hear the term shower base, that is the portion that sits below the tray/pan. This is often just a piece of lumber laid in place with an additional length of liner draped over it. Using Tile To Create a Custom Shower Floor in Your Bathroom. Tile is installed over DITRA using the thin-bed method in such a way that the mortar becomes mechanically anchored in the square, cutback cavities of the matting. The entire room will be wrapped in Kerdi; walls, floor, ceiling Should I apply waterproofer on the subfloor beneath a shower pan? The liner is a PVC or other polymer membrane that rests on top of the preslope. The tile is set in a thin bed of mortar or thinset. Install a pre-slope. Uncoupling membrane for DITRA-HEAT-E-HK electric floor heating cables, Uncoupling membrane with integrated sound control and thermal break. KERDI is specifically designed as a waterproofing membrane to be used in conjunction with ceramic and stone tile coverings. How to Install a Shower Pan Liner: Build a Waterproof Shower from the Though few enjoy being tested, leak tests should be low-stress occasions because the installer has the answer key. Aim for a height of about 1-1/2 inches on the border. Yes, it is important to lay subfloor down before installing a shower pan in the bathroom. After you have put down a double layer of plywood to provide the base for a custom walk-in shower pan, you need to cover the subfloor with a layer of tar paper, in this case referred to as a vapor barrier or a moisture barrier. 1) The metal lath or reinforcement can be placed over a cleavage membrane on top of the subfloor. One way of measuring is to remove a floor register and insert a slightly bent coat hanger in a corner crack until it hooks onto the bottom of the subflooring. Lee has over two decades of hands-on experience remodeling, fixing, and improving homes, and has been providing home improvement advice for over 13 years. Overlap the edges and roll them tightly. For professionals it looks easy, but only. How to Install a Mortared Shower Pan This may require the services of a qualified design professional (e.g., architect, engineer, etc.). The objective of this piece of paper is to provide a layer of moisture-inhibiting protection on top of the wood so that when you put the first layer of your deck mud in place to slope to the drain, the wood does not soak up the moisture and cause the concrete to dry too quickly. Raising the Bathroom Floor | Schluter *Recessing the floor of a shower must be done in a way that preserves the structural integrity and safety of the construction. Once it dries, it creates a waterproof barrier over which you can install the tile. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! The system can also be customized with floor heating cables to create a warm, luxurious tile floor. With the liner installed and visible, the next step is the leak test. Prefabricated shower tray: Schluter-KERDI-SHOWER-T/-TS/-TT, 3. The layers will create a slope toward the drain while keeping the surrounding materials waterproofed. This means that you will have a steeper slope on the walls closer to the drain. To install the subfloor, whether it is the primary or secondary layer, you will need to accurately measure the length and width of your built up shower pan, also taking into consideration any non-square corners. With the KERDI-LINE linear drain, the floor is sloped on a single plane which allows the use of large-format tile. It only takes a minute to sign up. Unless you waterproof the entire room floor, walls, and ceiling, steam induced moisture is going to penetrate SOMEWHERE to wood. You can also use the two-by-four as a screed to smooth down the mortar. Waterproofing strip: Schluter-KERDI-BAND, 5. However, if you are building a second story walk-in shower that is larger than 4 feet square, you should contact a structural engineer to make sure the second-story joists can handle the weight of the add-on and what shoring (if any) needs to be done.
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