subfloor thickness for shower pan

Which one to choose? The best answers are voted up and rise to the top, Not the answer you're looking for? 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. Market Research for Exporting to the U.S. Catalina 2021 Ceramic and Stone Tile Market Report, Kitchen and Bath Cabinets Countertops Reports. Curbs must be at least 2 in. When an inspector shows up to do the rough-plumbing inspection and sees a two-part drain in place, it triggers a future inspection that not every house receives: a shower-liner inspection, detailed in section P2503.6 of the IRc. Can I do the typical 16"o.c. Aim for a height of about 1-1/2 inches on the border. Tiling Project Guide. I ripped my old shower down to the studs and joists. However, shower bases can be sloped on a single plane to a linear drain, enabling the use of attractive large-format tiles. If necessary, lift the pan or base out of the way and install additional deck screws or level a low spot. All shower trays feature integrated KERDI waterproofing and are designed specifically to integrate with the KERDI-DRAIN. If you cannot or do not wish to recess the floor or use a ramp, the use of additional materials to raise the bathroom floor is another option. We have to step up to go in shower!!! Are you implying you would use pressure treated wood in the subfloor and not redgard it? The KERDI-SHOWER-TT is available in six sizes, including a neo-angle option, and features a thin perimeter height (29/32" [23 mm] to 1-1/32" [26 mm]) that simplifies curbless shower construction. It is where visible water will escape and limit the rise of water up the walls. But a shower pan isn't just about function. 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. Remove the subfloor material. This liner is the last line of defense between water and the subfloor. I understand the process of installing the membrane, deck and preparing the wall and ceiling substrate. You can now add the rest of the cement boards down to the level of the mortar bed. Save my name, email, and website in this browser for the next time I comment. I am putting in a whole new floor, joist and all, and the span is the 40". There are no special qualifications necessary to observe a wet floor, so the inspector should have little to do other than nod at a full pan and a dry floor. Multifunctional building panels: Schluter-KERDI-BOARD, 4. 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. Usually installers prefer to start with a half-inch of mud around the drain and slope their way upwards from there, roughly 1/8-inch per linear foot. Use the existing nails or deck screws as guides to determine the locations of the floor joists below the subfloor. Remove debris at the area of the subfloor where the shower pan installs, using a shop vacuum. Lay the waterproofing material on the floor of the shower, running it about five inches up each of the walls. This may require the services of a qualified design professional (e.g., architect, engineer, etc.). Quikrete makes two products that work well when building DIY shower pans. Why did US v. Assange skip the court of appeal? Bathroom Subfloor Thickness | DIY Home Improvement Forum Prepare the Subfloor. 3 Shower-Pan Choices for a Solid Tile Floor Installation, Video Series: Tile a Barrier-Free Bathroom. in the area of concern. Spread grout across the surface of the tile with the rubber tile float. A dependable, waterproof shower pan, or floor, is essential to the overall operation of the shower. Increasing subfloor thickness under new 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. Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. For hardwood finish flooring, which average about 3/8-inch to 3/4-inch in thickness, 1/2-inch to 3/4-inch-thick plywood is the preferred subfloor, though there are a variety of . Actually will be basically a fully tiled wet room. Uncoupling and waterproofing membrane: Schluter-DITRA. The studs were rotten, the subfloor was rotten, and the top of the joists (in some places) were weak and rotten. JavaScript is disabled. Is it safe to publish research papers in cooperation with Russian academics? What differentiates living as mere roommates from living in a marriage-like relationship? Remove any residual mortar by hand or with the trowel . 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. 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. Note: While the image below shows a concrete subfloor, this is also achievable with a wood subfloor. DITRA has a nominal 1/8" (3 mm)-thickness which minimizes tile assembly thickness. Why typically people don't use biases in attention mechanism? I will have to look some more when I get home, but i don't think there will be any getting around using hangers. The shower pan should be slightly larger than the drain assembly. Making statements based on opinion; back them up with references or personal experience. Apply some mixed mortar at the marked area of a low spot on the subfloor. Asking for help, clarification, or responding to other answers. Thanks for contributing an answer to Home Improvement Stack Exchange! Cut two-by-six lumber to fit between the studs of the shower stall. Waterproofing strip: Schluter-KERDI-BAND, 5. Waterproofing corners Schluter-KERDI-KERECK. The KERDI-SHOWER-TS features an off-center drain placement and is 1-1/2" (38 mm) high. The KERDI-SHOWER-TT prefabricated sloped shower trays eliminate the need for a mortar bed which ultimately reduces the weight and installation time. This is especially true when remodeling at an existing subfloor. Made of polyethylene, DITRA also serves as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. 22K views 1 year ago Installing an acrylic or fiberglass shower pan using a mortar bed increases the strength and longevity of your shower pan. 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. Run a thin bead of silicone around the perimeter of the drain. for 2x6 joists w/ a 40" span under the shower pan? Get daily tips and tricks for making your best home. The curb is the open entry point where the user enters the shower. 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). Use only a little bit of water at a time to maintain a stiff, peanut butter-like consistency. How To Install a Shower Pan - The Home Depot For professionals it looks easy, but only. Bonded waterproofing and vapor-retardant membrane, Waterproof, multifunctional tile substrate and building panel. Blocking allows you to run the waterproofing material up the sides of the shower, which creates the DIY shower pan liner. Shower pan membrane typically comes in thicknesses from 30 mil (0. 1) The metal lath or reinforcement can be placed over a cleavage membrane on top of the subfloor. 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-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. This can be tricky to set up and should be planned for ahead of time when building a curbless shower. Shower basins are called pans, floors, or receptors. 2. How to Build Shower Pans (DIY) | Family Handyman The best answers are voted up and rise to the top, Not the answer you're looking for? Profile that forms a splashguard in curbless showers. The Right Way to Install Shower Pan Liners - Fine Homebuilding Cut the piece to length with a handsaw. How to Install a Shower or Tub Faucet. If total energies differ across different software, how do I decide which software to use? DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. 2x6 Joist Spacing and Subfloor Thickness for Shower Pan Use mortar between OSB and old concrete subfloor, in shower? above the finished threshold. IMHO, if you will be tiling the floor I would put a water proof membrane under the entire floor and not worry about using pressure treated wood for the subfloor. Oatey's shower pan liners are offered with either CPE (CPE pan liners are recommended if your floor has a radiant heat system) or PVC sheet material at 30 mil. It is important to remember, if you choose a cement backer board, you will need to use the manufacturer recommended backer board screws. 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. Multifunctional building panels: Schluter-KERDI-BOARD, 2. The KERDI-SHOWER-TT shower trays feature integrated KERDI waterproofing and are designed to integrate with the KERDI-DRAIN. In the mixing tray, mix the mortar with water, using a garden hoe. Long showers, slow drains, or minor cracks or shrinkage in the grout can allow some water to sneak through the shower floors surface. How to Lower the Subfloor for a Handicapped Shower Pan Donato Pompo, CTC CMR CSI CDT MBA, is the leading tile and stone forensic expert and consultant in North America, and he is a National Tile Contractors Association Recognized Consultant. Should I apply waterproofer on the subfloor beneath a shower pan? Install the liner over the preslope & wrapping the curb, extending a minimum of 6" up the wall. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. How to Install a Mortared Shower Pan 1. The subfloor needs to be a minimum of two layers of 3/4-inch exterior grade plywood before you can move to actually putting down the concrete layer of deck mud that provides the slope and the base for the shower pan tile. DITRA-HEAT-DUO features an integrated bonding fleece that provides sound control, as well as a thermal break. Perforations or nails cannot penetrate the liner less than 1 in. The subfloor needs to be a minimum of two layers of 3/4-inch exterior grade plywood before you can move to actually putting down the concrete layer of deck mud that provides the slope and the. Remove any dampness or debris on the . Shower pan over 2nd story wood subfloor install - JLC Online Continuing Education for Architects & Designers. Learn more about Stack Overflow the company, and our products. 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. DO NOT SAND, CUT, OR MAKE ANY CHANGES/MODIFICATIONS TO THE SURFACE OF THE SHOWER PAN WHATSOEVER. Uncoupling and waterproofing membrane: Schluter-DITRA, 5. See Recessing the Shower Floor Technical detail here. While the 1955 code permitted site-built pans only in special cases where the installation of a premade pan was demonstrably impractical, such pans are now common and have their own provision in section P2709 of the IRc. You should end up with material leading to the edge of your framed walls and shower curb. 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. First, am I correct in determining 1/2" as not enough support ? The first and most popular because of its affordability and ease of installation is paint-on latex waterproofing. Resting above the waterproof membrane is a second bed of mortar that generally follows the same contours as the preslope. Sweep out any debris from sub floor. A subfloor is the layer at the very bottom of your shower pan. Wood floors first need to be able to withstand the weight of a custom walk-in shower. 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. Did the Golden Gate Bridge 'flatten' under the weight of 300,000 people in 1987? The entire shower will be done with Kerdi. Is there any way to alleviate the movement from the hangers? He spent more than 15 years as a third-generation tile and stone contractor before transitioning into freelance writing. Yes, it is important to lay subfloor down before installing a shower pan in the bathroom. What do I put under my shower pan? - Liquid Image Continuing Education for Architects & Designers. KERDI-BOARD, a multifunctional waterproof building panel, gives you more control over your tile installation project by providing you with the means to simply and easily create ideal substrates for tile. Would I be better w/ 12" o.c. 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. Further, DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. Shower bases must be sloped from all directions to point drains, therefore limiting tile selection to mosaics or other relatively small-format tiles. Clean the Subfloor. CTRL + SPACE for auto-complete. With the rest of the shower drain temporarily in place, draw a pencil or chalk line around the perimeter of the walls to add a reference line, which represents the top of the tile. The liner itself must be recessed into its backing so as not to occupy the space required for the wall covering. In other words, the face of the liner should be flush with the face of the studs so the wall covering can be installed flat to the wall. 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. 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. 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. The base of a DIY shower pan needs to be about 2 to 3 inches thick at the edges before the tile is added. Upstairs shower pan on floor that bounces slightly. 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 ? The flange provides a water barrier to prevent water from exiting he shower during normal use, or in case of a "back-up". How to Replace a Rotten Floor Under a Shower - SFGATE 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). If you are worried about it and need to use 1/2" sheathing for other reasons then just install 2x blocking perpendicular to the joist at a shorter distance on center, say 8"-12" O.C. While the detail images below demonstrate options for KERDI-DRAIN, please note that raising the bathroom floor is also possible with KERDI-LINE. With the KERDI-LINE linear drain, the floor is sloped on a single plane which allows the use of large-format tile. 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. What is scrcpy OTG mode and how does it work? The first step is to determine the depth of the shower pan. The preslope is laid on tar paper. This means that you will have a steeper slope on the walls closer to the drain. Use tape and plastic to cover up the shower drain so that the mortar and other debris will not clog it. There is no difference between a shower tray and a shower pan. Cut and lay down the tar paper on the floor of the shower. Which ability is most related to insanity: Wisdom, Charisma, Constitution, or Intelligence? Depending on the size of the shower it doesn't always work, but it saves time if you can work it out that way. Made of soft polyethylene and featuring an anchoring fleece on both sides, KERDI is easily anchored to the substrate using thin-set mortar. Let this mortar bed dry for at least 24 hours. Before the liner is installed, a solid subbase must be installed to create a smooth and uniform slope to the drain. The subbase must slope 1/4 in. DITRA has a nominal 1/8" (3 mm)-thickness which minimizes tile assembly thickness. DITRA-HEAT-DUO features an integrated bonding fleece that provides sound control, as well as a thermal break. Required fields are marked *. 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. Frame out shower stall area to shower pan dimensions. 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. Spread out thinset with the notched trowel and press the tile into the thinset. With a screw gun, install 2-inch deck screws alongside each existing nail or screw to securely fasten the subfloor to the joists. The KERDI-SHOWER-LT accommodates the KERDI-LINE drain at intermediate locations and is also offered in a selection of sizes with thicknesses ranging from 1-1/4" (32 mm) to 1-7/16 (36 mm). The downside of these finishes is that they arent themselves waterproof. If the shower pan is done properly, I shouldn't expect water to get into the subfloor. otherwise I'd be in big trouble (even if it was treated). 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. Install the Subfloor. Fasten it down with roofing nails or staples. What do I do about the Missing Stair Nosing and Short Stair Tread. This provides the bonding element for the concrete and gives it something to hold onto. Prepare subfloor and drain plumbing. It's about how it looks and how it feels underfoot. Therein the new sheathing would not run under the wall and the wall would be now supported by the blocking. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. How thick should the Mortar Bed for a Shower Pan Floor in a Shower? How to Create a Shower Floor - Part 4 - The Floor Elf 2023 The Taunton Press, Inc. All rights reserved. The liner is a PVC or other polymer membrane that rests on top of the preslope. This must be tight to the floor & walls, and be continuous; the corners can't have any holes, the curb can't have any holes. Become a member and get unlimited site access, including the Floating Tile Floors: Basics and Availability, How to Install Floor Cement Board Underlayment for Tile, Prefabricated Stall vs. Tiled Shower: Product Comparison Guide. Press the material firmly into the silicone on the shower drain. Specifically designed for ceramic and stone tile installations, the family of DITRA products provides effective uncoupling protection, preventing cracked tiles and grout. I used an unbonded mortar bed, so I have a tar paper slip sheet on the subfloor with wire mesh stapled to the top of it. Ask an assistant to help position the shower base or pan in place, with the hole for the drain centered over the drainpipe or hole in the subfloor. The tileable covering support is placed flush with the top of the bonding flange and can therefore accommodate any thickness tile covering. Layers of a shower pan. The nominal 5/16 (8mm) thickness minimizes tile assembly thickness. We are putting in a shower in our bathroom remodel. 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. Multifunctional building panels: Schluter-KERDI-BOARD, 4. 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. Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. This top mortar layer must be very smooth, so take your time with it. I'll be pouring a new concrete shower pan. With lengths from 20" to 72" (50 cm to 180 cm) in 4" (10 cm) increments, KERDI-LINE can fit virtually any shower design. How thick should the Mortar Bed for a Shower Pan Floor in a Shower? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. The issue is that the previous subfloor was 1/2" ply over joists 17 1/2" OC - by my research, not enough support. Code requires that lining materials in field-built shower pans slope 1/4 in. Increasing subfloor thickness under new shower pan While cement backer boards are moisture-resistant, they are not waterproof. Different options and thicknesses of DITRA membrane are available to best suit the needs of your project. Waterproofing strip: Schluter-KERDI-BAND, 6.

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