A typical walk-in shower built on the first floor of a home will be able to rest its weight on the joists without concern. Litigation and Insurance Claims Investigation Services. I removed these and droped the 3/4 OSB subfloor only in the shower area. Should I redo this wall to avoid a mold sandwich? With the flat trowel, taper down the mortar towards the shower drain. 75mm) up to 75 mil (1. Fasten it down with roofing nails or staples. 9mm . VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. 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. Perforations or nails cannot penetrate the liner less than 1 in. The entire bottom of the shower pan needs to sit on a flat, level surface. Measuring it at that point. 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. 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 ? Add the Top Mortar Layer. First, am I correct in determining 1/2" as not enough support ? If you were going to tile the rest of the room, I'd consider adding another sheet of ply, at least 3/8" thick (the thinnest suitable to a second layer with tile) under the whole floor. 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. Helping You to Do It Yourself! 1. 3. Alternative, proprietary products are also popular and can be approved locally. Wood floors first need to be able to withstand the weight of a custom walk-in shower. Made of soft polyethylene and featuring an anchoring fleece on both sides, KERDI is easily anchored to the substrate using thin-set mortar. A surprise to many, this means the blocking and studs may need to be shaved down by the thickness of the liner material to accommodate it. What were the most popular text editors for MS-DOS in the 1980s? DITRA has a nominal 1/8" (3 mm)-thickness which minimizes tile assembly thickness. 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. His has been published online through GTV Magazine, Home Anatomy, TravBuddy, MMO Hub, Killer Guides and the Delegate2 group. Yes, it is important to lay subfloor down before installing a shower pan in the bathroom. One popular way to create a shower pan is to install a pre-fabricated polyurethane or fiberglass pan. 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. Your Bathroom Remodel Starts With the Subfloor in the Shower Pan at Become a member and get instant access to thousands of videos, how-tos, tool reviews, and design features. 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). Make sure the shower pan is aligned . What do I do about the Missing Stair Nosing and Short Stair Tread. Place a 3-foot level on the floor facing from right to left, and again facing from front to back at the area of the pan. They can easily be cut to size with a utility knife, or may be extended with dry-pack mortar. per ft. toward the drain from all portions of the pan. Frame out shower stall area to shower pan dimensions. JavaScript is disabled. If the subfloor is not flat and level, apply a self-leveling compound following the . 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. Waterproof, multifunctional tile substrate and building panel. Thus, additional measures must be taken to protect wall cavities from water and vapor penetration. 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. Why typically people don't use biases in attention mechanism? 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. I think our shower tile guy made this base too thick. 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. The KERDI-SHOWER-TT prefabricated sloped shower trays eliminate the need for a mortar bed which ultimately reduces the weight and installation time. Use either Quikrete Floor Mud or Quikrete Sand/Topping Mix for the job. For professionals it looks easy, but only. Thanks for contributing an answer to Home Improvement Stack Exchange! Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. Seems like 2-3 inches. 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. The top shower pan floor covering is the tile. Building a custom DIY shower pan from tile in a mortar bed can help you create the perfect floor for your shower that's both beautiful and waterproof. 1/2" is a bit thin to span that distance, although it should not be a problem with a concrete slab above it. Install the liner over the preslope & wrapping the curb, extending a minimum of 6" up the wall. This is a dialog window which overlays the main content of the page. DITRA-HEAT-DUO features an integrated bonding fleece that provides sound control, as well as a thermal break. Blocking allows you to run the waterproofing material up the sides of the shower, which creates the DIY shower pan liner. beyond and around rough jambs at the opening and at least 2 in. 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. The nominal 5/16 (8mm) thickness minimizes tile assembly thickness. 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. 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. Hammer down any protruding nails used to fasten the subfloor to the floor joists below. 2x6 Joist Spacing and Subfloor Thickness for Shower Pan This slope is later refined with a second bed of mortar. A subfloor is the layer at the very bottom of your shower pan. We also smartly list products and services to help in moving your project along. Asking for help, clarification, or responding to other answers. 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. Hassle with 5/8" first layer, especially with OSB, is that it's very easy to strip the hole with the screw. Because of this, hand-fabricating shower pans can increase the chance of failure, and code provisions generally address two hazards: leaks and sanitation. U.S. Tile Consumption Increased in Q3 2022, Despite Rising Prices. 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. Quikrete makes two products that work well when building DIY shower pans. Jan 21, 2021. Profile that forms a splashguard in curbless showers. The KERDI-SHOWER-LTS is a prefabricated shower tray designed to accommodate the KERDI-LINE linear drain along the perimeter of the shower. Kerdi Shower Tray ST Subfloor Requirements Otherwise, you must install sister joints before . 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. Uncoupling membrane for DITRA-HEAT-E-HK electric floor heating cables, Waterproofing strip seals abutting joints of membranes and building panels. 2 inches of shower pan is not excessive if its an old school dry pack with a Pre slope. I'll be pouring a new concrete shower pan. 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. Has the Melford Hall manuscript poem "Whoso terms love a fire" been attributed to any poetDonne, Roe, or other? While the KERDI membrane is used in the image above, note that KERDI-BOARD multifunctional building panels are also suitable. 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. 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). Stand in the base or pan to determine if the subfloor is stable. Waterproofing strip: Schluter-KERDI-BAND, 5. above the finished threshold, whether its at the floor level or on a raised curb. Do I need to apply a waterproofer such as Redgard to the subfloor ply before I apply the thinset to set the Kerdi shower pan? Get daily tips and tricks for making your best home. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Which was the first Sci-Fi story to predict obnoxious "robo calls"? 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. Waterproofing Corners: Schluter-KERDI-KERECK, 1. With the trowel, taper down the mortar to the shower drain. I plan on replacing some studs and sistering others. The shower tray, available in a range of sizes with thicknesses from 1-21/32" (42 mm) to 2-3/8" (60 mm), eliminates the need for a mortar bed, and is easy to install. With a screw gun, install 2-inch deck screws alongside each existing nail or screw to securely fasten the subfloor to the joists. The subbase must slope 1/4 in. This doubles as an anti-fracture membrane which is painted onto the surface of the concrete with a paintbrush or a paint roller. Shower pan membrane typically comes in thicknesses from 30 mil (0. 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. You'll need various materials for a shower pan to build up several layers. Which ability is most related to insanity: Wisdom, Charisma, Constitution, or Intelligence? Then you have to waterproof the pre-sloped mortar bed with either a liquid applied membrane or a sheet membrane. Bonded waterproofing and vapor-retardant membrane, Waterproof, multifunctional tile substrate and building panel. Form the shower pan box frame with blocking between the studs. 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. Install the shower liner. First by hand, then with the trowel, spread the mortar around the base, mounding it higher around the edges. You can float over a concrete substrate or nail on metal lath over a wood subfloor. In such a high humidity environment, I'd remove the existing sub-floor and put in pressure treated plywood in the entire room. 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. Over a concrete subfloor use a bonded mortar bed of appropriate thickness to build up the rest of the bathroom floor. However, shower bases can be sloped on a single plane to a linear drain, enabling the use of attractive large-format tiles. We are putting in a shower in our bathroom remodel. 2. Toe-screw 2x4s for straight curbs and cut off the excess hardboard after forming. What is the final thickness of a DIY shower pan? 9 Common Subfloor Mistakesand How to Avoid Them, Mortared Shower Pan Install on Wood Subfloor, How to Prepare a Floor for a Walk-in Shower, A subfloor will add extra stability and structure to your shower area floor, Plywood is an easily accessible material, cut it to the shower area floor size, and install using non-moisture corrosive screws, Cement Backerboard needs to be installed with a light coat of tile adhesive to secure it to the floor and also eliminate any voids, Make sure to use as few material pieces as possible, avoid multiple pieces since this will allow the floor to flex. Note: While the image below shows a concrete subfloor, this is also achievable with a wood subfloor. How to Prepare a Floor for a Walk-in Shower All trays feature integrated KERDI waterproofing and are available in several sizes to fit a variety of shower configurations. How to install a shower pan drain with this non-standard drainage pipe? Increasing subfloor thickness under new shower pan, Installing ceramic tile on top of wooden bathroom floor. Where theres no curb at the threshold, as in a curbless design, a temporary curb must be constructed for the leak test. With the liner installed and visible, the next step is the leak test. The KERDI-SHOWER-TS features an off-center drain placement and is 1-1/2" (38 mm) high. 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. Designed to accommodate the KERDI-DRAIN point drain, the KERDI-SHOWER-T/-TS/-TT shower tray can be installed over a recessed subfloor to create an even transition from the floor tile right into the shower. DITRA is specifically designed for ceramic and stone tile installations. How thick is shower pan membrane? Allow the mortar to cure overnight and proceed to the next step. 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. Waterproofing strip: Schluter-KERDI-BAND, 6. How to Prepare a Subfloor for a New Fiberglass Shower Pan With the KERDI-LINE linear drain, the floor is sloped on a single plane which allows the use of large-format tile. Build a high border around the perimeter of the shower, about 1/4-inch below the tile top perimeter line. 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. Aim for a height of about 1-1/2 inches on the border. This site is protected by reCAPTCHA and the Google. Is it safe to publish research papers in cooperation with Russian academics? Nail the top of the waterproof material to the studs to prevent it from falling. Point drain with integrated bonding flange. A fully waterproof assembly is easily achieved by sealing seams and fastener penetrations with KERDI-BAND. 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. I am putting in a whole new floor, joist and all, and the span is the 40". How do you expect to prevent steam from getting everywhere? 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. The curb is between two inches and six inches above the level of the shower drain. Shower bases must be sloped from all directions to point drains, therefore limiting tile selection to mosaics or other relatively small-format tiles. But remember, the code is a minimum standard and not a measure of fine home building. 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. Acrylic shower pans are the least expensive type of pan and can last for about 10 years before there could be a crack or leak. Tim Anderson has been freelance writing since 2007. 4. The first and most popular because of its affordability and ease of installation is paint-on latex waterproofing. Seal the shower liner to the shower drain. tar command with and without --absolute-names option.
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