subfloor thickness for shower pan
How to Attach to a Concrete Ceiling Without Drilling, 12 indoor plants you dont need a green thumb to keep alive, How to Set an Acrylic Shower Pan in Mortar. KERDI-BAND is only 4 one-thousands of an inch (4 mil)-thick, half the thickness of KERDI thus limiting buildup, and ensuring a smooth surface for tile installation.. Waterproofing strip seals abutting joints of membranes and building panels. Are there any canonical examples of the Prime Directive being broken that aren't shown on screen? VASPKIT and SeeK-path recommend different paths. Uncoupling membrane for DITRA-HEAT-E-HK electric floor heating cables, Uncoupling membrane with integrated sound control and thermal break. A recessed shower floor allows for the installation of a sloped mortar bed or a prefabricated shower tray that is flush with the rest of the bathroom floor. beyond and around rough jambs at the opening and at least 2 in. 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. If the subfloor is completely flat and level, proceed to step 3. 2 and 3 outlets are available making it simple to connect to standard plumbing. 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. Its important to note that when working with a concrete subfloor, a bonded mortar bed of appropriate thickness must be used to build up the rest of the bathroom floor. Place the level across the pan or base to determine if it is level both ways. After the sloped subbase is in, the liner can be installed. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 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. 3. 1 Answer Sorted by: 2 1/2" is a bit thin to span that distance, although it should not be a problem with a concrete slab above it. Thanks for contributing an answer to Home Improvement Stack Exchange! You should end up with material leading to the edge of your framed walls and shower curb. Install the shower liner. Long showers, slow drains, or minor cracks or shrinkage in the grout can allow some water to sneak through the shower floors surface. And if the pan isnt properly sloped to carry water to the drain, water standing in the pan can become a petri dish of bacteria and possibly a slipping hazard. A standard material used for a subfloor is going to be a cut to size plywood, mainly due to its availability. Alternatively, add small amounts of mortar to fill the low spot and repeat the process. 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 ? A secondary drain, mounted on the waterproof pan under the showers finished floor, drains this water away. Prepare subfloor and drain plumbing. Thanks for contributing an answer to Home Improvement Stack Exchange! With the KERDI-SHOWER-TT thin shower tray on a wood subfloor, you can build up the rest of the bathroom floor by installing either a 5/8" or 3/4" plywood/OSB panel on top of the wood subfloor along with DITRA or another Schluter-Systems uncoupling membrane. 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. Frame the shower curb. Asking for help, clarification, or responding to other answers. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. Like all drains, the intent is for bulk water to drain through the visible drain opening. In order to pull this off I would need to add joists that line up with the dimensions of the shower. While cement backer boards are moisture-resistant, they are not waterproof. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? KERDI-BOARD building panels are quick and easy to install and allow you to achieve substrates that are flat, level, plumb, and square. Specifically designed for ceramic and stone tile installations, the family of DITRA products provides effective uncoupling protection, preventing cracked tiles and grout. 9mm . Continuing Education for Architects & Designers. Trusted, comprehensive guidance from the pros for a great-looking tile job in any room of the house. This secondary layer can be added on top of the running boards or concrete slab. per ft. toward the drain from all portions of the pan. Profile that forms a splashguard in curbless showers. Depending on the subfloor material, you will need to ensure it is sturdy enough to support the weight of a built up shower pan. thickness, and include a range of dimensions such as: 5 ft. x 6 ft. 6 ft. x 33 ft. 5 ft. x 40 ft. 4 ft. x 50 ft. 5 ft. x 50 ft. 6 ft. x 50 ft. 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. Install KERDI-LINE adjacent to the wall, or at intermediate locations of your shower floorand then choose the drain grate that best matches your dcor and desired finished look. Install the liner over the preslope & wrapping the curb, extending a minimum of 6" up the wall. To learn more, see our tips on writing great answers. JavaScript is disabled. Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. Johnathan C. Brewer II is a licensed general contractor specializing in kitchen, bath remodels, and general constructionwith two decades of professional experience. Start your subscription today and save up to 70%. The primary objective is to support the weight of the built up shower pan and provide a durable subfloor in the event of the natural processes of home settling and seismic movements. Prefabricated shower tray: Schluter-KERDI-SHOWER-T/-TS/-TT, 3. Remove any residual mortar by hand or with the trowel. With the KERDI-LINE linear drain, the floor is sloped on a single plane which allows the use of large-format tile. Use either Quikrete Floor Mud or Quikrete Sand/Topping Mix for the job. The drain must be sealed so the pan can be filled with water to a depth of at least 2 in., measured at the threshold. What differentiates living as mere roommates from living in a marriage-like relationship? Install Subfloor Mix and place the first mortar layer. Synopsis: Code expert Glenn Mathewson explains the details required by code and modern plumbing standards when fabricating a shower pan, including the two-part drain assembly, the subbase material and slope, the curb height, and the liner application. 2. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Shower pan membrane typically comes in thicknesses from 30 mil (0. Free Tile and Stone Installation Guidelines, Why is the Wood Grain Finish on my Glazed Porcelain Tile Coming, Tile Installer Thin-set Standards (ITS) Verification Course. The question of whether the code requires a similar liner over shower seats often comes up, but the IRC offers no guidance here. How do you expect to prevent steam from getting everywhere? Is it safe to publish research papers in cooperation with Russian academics? Install the liner over a pre-sloped bed, as I explain here. DITRA-HEAT features a thickness of 1/4" (5.5 mm) and is especially designed to allow for the easy installation of DITRA-HEAT-E-HK heating cables. Similar to the lower mortar layer that you created earlier, mix the mortar in the mixing tray, then dump it onto the floor of the shower. 1. . Thus, additional measures must be taken to protect wall cavities from water and vapor penetration. But these drains go a step further. Install the Subfloor. rev2023.4.21.43403. I am putting in a whole new floor, joist and all, and the span is the 40". Multifunctional building panels: Schluter-KERDI-BOARD, 4. How thick is shower pan membrane? VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Kerdi shower pan in a shower with 2 drains, How do I deal with 3" subfloor overhang and extreme joist notch, Medium term repair for cracked shower pan. A dependable, waterproof shower pan, or floor, is essential to the overall operation of the shower. First, am I correct in determining 1/2" as not enough support ? Test fit shower pan drain housing into subfloor bore hole. Generally speaking, the subfloor should be a minimum of -inch thick for any wet application. higher than the drain, but not more than 9 in. Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. It is going to be 4 tall or so from the bathroom floor. How to install a shower pan drain with this non-standard drainage pipe? 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. 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. DITRA has a nominal 1/8" (3 mm)-thickness which minimizes tile assembly thickness. Contact us: 888-472-4588 Is it safe to publish research papers in cooperation with Russian academics? While the KERDI-SHOWER-TT shower trays are specifically designed for curbless showers, the KERDI-SHOWER-T and KERDI-SHOWER-TS shower trays, which feature thicker heights (1-1/8" [29 mm] - 1-1/2" [38 mm]) can also be usedseveral options are available to best accommodate your project. Prepare shower pan for the first mortar layer. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. CTRL + SPACE for auto-complete. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This top mortar layer must be very smooth, so take your time with it. I plan on replacing some studs and sistering others. Uncoupling and waterproofing membrane: Schluter-DITRA, 4. You can also use a membrane system, which come in a variety of formats and are either self-adhering or meant to be installed with thinset mortar over the top of the concrete slab. 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. If necessary, lift the pan or base out of the way and install additional deck screws or level a low spot. With the KERDI-SHOWER-TT thin shower tray on a wood subfloor, you can build up the rest of the bathroom floor by installing either a 5/8" or 3/4" plywood/OSB panel on top of the wood subfloor along with DITRA or another Schluter-Systems uncoupling membrane. DITRA is specifically designed for ceramic and stone tile installations. Measuring it at that point. DITRA-HEAT-DUO features an integrated bonding fleece that provides sound control, as well as a thermal break. Let this mortar bed dry for at least 24 hours. Form the shower pan box frame with blocking between the studs. Tiling Project Guide. You can now add the rest of the cement boards down to the level of the mortar bed. While the detail images below demonstrate options for KERDI-DRAIN, please note that raising the bathroom floor is also possible with KERDI-LINE. Unless you waterproof the entire room floor, walls, and ceiling, steam induced moisture is going to penetrate SOMEWHERE to wood. in the area of concern. because of height issues upstairs I plan to use 2x6 joists. The flange is fusion welded to the perimeter of the shower base's core. Of course the (relatively) small increase in price for treated plywood may be worth the peace of mind (are be a backup if water makes it through the floor's water proofer. Alternative, proprietary products are also popular and can be approved locally. One side will be resting on a wall, the other side the joists will be hung using strong-ties or the like. Hardwood Flooring. 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. With the utility knife, create slits for the four bolts on the shower drain to protrude upward. The top shower pan floor covering is the tile. Different options and thicknesses of DITRA membrane are available to best suit the needs of your project. He spent more than 15 years as a third-generation tile and stone contractor before transitioning into freelance writing. Water that gets into the mortar bed won't be able to drain out. 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. Uncoupling and waterproofing membrane: Schluter-DITRA. Premanufactured kit showers may be installed without worry. Browse other questions tagged, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site. DO NOT SAND, CUT, OR MAKE ANY CHANGES/MODIFICATIONS TO THE SURFACE OF THE SHOWER PAN WHATSOEVER. Premanufactured kits do not weigh enough to be of concern, so you can go directly over the existing subfloor (plywood or OSB). DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. I think our shower tile guy made this base too thick. Learn more about Stack Overflow the company, and our products. Though few enjoy being tested, leak tests should be low-stress occasions because the installer has the answer key. With lengths from 20" to 72" (50 cm to 180 cm) in 4" (10 cm) increments, KERDI-LINE can fit virtually any shower design. Measure the shower area to determine the size of the shower pan you need to make. While the KERDI membrane is used in the image above, note that KERDI-BOARD multifunctional building panels are also suitable. Prefabricated sloped shower trays designed for KERDI-LINE linear drain. Floating Tile Floors: Basics and Availability, How to Install Floor Cement Board Underlayment for Tile, Prefabricated Stall vs. Tiled Shower: Product Comparison Guide. The finished floors of showers can slope up to 1/2-in- 12; anything steeper could be a slip hazard. If the subfloor is not flat and level, apply a self-leveling compound following the . Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. The liner is a PVC or other polymer membrane that rests on top of the preslope. Why typically people don't use biases in attention mechanism? Is there any way to alleviate the movement from the hangers? It will never come into contact with the pan liner. Add the Top Mortar Layer. It is important to remember, if you choose a cement backer board, you will need to use the manufacturer recommended backer board screws. Actually will be basically a fully tiled wet room. DITRA provides uncoupling to prevent cracked tile and grout. 2 inches of shower pan is not excessive if its an old school dry pack with a Pre slope. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! Waterproofing corners Schluter-KERDI-KERECK. These instructions assume you are building a shower pan on plywood subflooring, but if you are building a DIY shower pan on concrete slab, you will need to consider a riser kit. What do I do about the Missing Stair Nosing and Short Stair Tread.