subfloor thickness for shower pan

Therein the new sheathing would not run under the wall and the wall would be now supported by the blocking. TileTip.com is your premier source for tile information and all the remodeling questions you have before, during, and after the installation. The KERDI-SHOWER-TT prefabricated sloped shower trays eliminate the need for a mortar bed which ultimately reduces the weight and installation time. 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. Seems like 2-3 inches. beyond and around rough jambs at the opening and at least 2 in. 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). The hyperbolic space is a conformally compact Einstein manifold. Alternatively, you can choose to install a cement backer board as your subfloor or as an addition for support and structure. I am putting in a whole new floor, joist and all, and the span is the 40". There are many resources available regarding the techniques and skills required to assemble a quality site-built shower pan, but they often fall short in explaining the details required by modern plumbing standards. This slope is later refined with a second bed of mortar. William Machin began work in construction at the age of 15, while still in high school. Aim for a height of about 1-1/2 inches on the border. To subscribe to this RSS feed, copy and paste this URL into your RSS reader. It will never come into contact with the pan liner. Modern shower styles use offset drains or linear drains for a sleek look that keeps the drain out from underfoot when showering. As for the wall studs, we would typically leave the wall as is and shore it up from underneath with blocking, also installing blocking along edges of the new sheathing. 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. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. The hyperbolic space is a conformally compact Einstein manifold, Counting and finding real solutions of an equation. Hardwood Flooring. 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. Waterproofing strip: Schluter-KERDI-BAND, 5. 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. Thus, additional measures must be taken to protect wall cavities from water and vapor penetration. I've never heard of doing this. The tileable covering support is placed flush with the top of the bonding flange and can therefore accommodate any thickness tile covering. 3. We gather the best information, organize it, and make it available to you according to the current stage of your remodeling project. Has the cause of a rocket failure ever been mis-identified, such that another launch failed due to the same problem? This video shows you one way to set the. 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. The subbase must slope 1/4 in. Floating Tile Floors: Basics and Availability, How to Install Floor Cement Board Underlayment for Tile, Prefabricated Stall vs. Tiled Shower: Product Comparison Guide. While the detail images below demonstrate options for KERDI-DRAIN, please note that raising the bathroom floor is also possible with KERDI-LINE. common sense would dictate that the same minimum 1/4-in-12 slope is critical to keep bulk water moving. Wearing waterproof gloves, dump the mixed mortar onto the shower floor. Prepare the Subfloor. What is this brick with a round back and a stud on the side used for? in the area of concern. A major perk of site-built shower pans is that they allow the installation of custom tile, stone, or other aggregate floor surfaces. Asking for help, clarification, or responding to other answers. Allow the mortar to cure overnight and proceed to the next step. 1) The metal lath or reinforcement can be placed over a cleavage membrane on top of the subfloor. Hammer down any protruding nails used to fasten the subfloor to the floor joists below. Remove any residual mortar by hand or with the trowel . Made of polyethylene, DITRA also serves as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. Prefabricated sloped shower tray: Schluter-KERDI-SHOWER-LTS, 3. Bonded waterproofing and vapor-retardant membrane, Waterproof, multifunctional tile substrate and building panel. What positional accuracy (ie, arc seconds) is necessary to view Saturn, Uranus, beyond? 2 and 3 outlets are available making it simple to connect to standard plumbing. Install a pre-slope. Use the scrap piece of two-by-four and level to continually check the tapered slope. DITRA has a nominal 1/8" (3 mm)-thickness which minimizes tile assembly thickness. 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. In most cases, the job is easier with the help of an assistant. 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. 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. for 2x6 joists w/ a 40" span under the shower pan? Waterproofing corners Schluter-KERDI-KERECK, 1. Mark the top of the coat hanger and withdraw it. It is important to remember, if you choose a cement backer board, you will need to use the manufacturer recommended backer board screws. Prepare subfloor and drain plumbing. The anchoring fleece is embedded in thin-set mortar to provide a mechanical bond to the substrate. Premanufactured panels and pans as walk-in showers can be installed directly over the top of the concrete without any concern. Its strong. I ripped my old shower down to the studs and joists. VASPKIT and SeeK-path recommend different paths. 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. Water that gets into the mortar bed won't be able to drain out. Add mortar or small amounts of water, as necessary, so the batch is the consistency of moist mashed potatoes. The liner is a PVC or other polymer membrane that rests on top of the preslope. 2023 The Taunton Press, Inc. All rights reserved. Helping You to Do It Yourself! He spent more than 15 years as a third-generation tile and stone contractor before transitioning into freelance writing. Cut two-by-six lumber to fit between the studs of the shower stall. This secondary layer can be added on top of the running boards or concrete slab. 9mm . Bring all of these elements together using the profiles and fasteners specifically designed for KERDI-BOARD assemblies. DITRA-HEAT-DUO features an integrated bonding fleece that provides sound control, as well as a thermal break. Determine whether the floor needs to be leveled and mark the floor at the low spots. Add the Top Mortar Layer. The best answers are voted up and rise to the top, Not the answer you're looking for? Free-space on the underside of the matting provides a route for excess moisture and vapor to prevent damage to the tile layer above. Coat both sides of the seam with the primer or sealer appropriate to the material, covering about 4 inches from the edges. DITRA provides uncoupling to prevent cracked tile and grout. 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. 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. 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. A minor leak may only be discovered after the nearby walls or floor below are heavily damaged (code is not concerned with a visible escape of water pouring out onto your bathroom floor, but rather a sneaky invisible leak). Note: While the image below shows a concrete subfloor, this is also achievable with a wood subfloor. 2 inches of shower pan is not excessive if its an old school dry pack with a Pre slope. 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. 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. It is normal to have a shower curb/dam. This site is protected by reCAPTCHA and the Google. Mark a piece of 1-by-4 pine or fir as a leveling rod for the mortar, using the 3-foot level. in the area of concern. DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. Sign up to our newsletter and get exclusive deals you wont find anywhere else straight to your inbox! The KERDI-SHOWER-TT shower trays feature integrated KERDI waterproofing and are designed to integrate with the KERDI-DRAIN. Using Tile To Create a Custom Shower Floor in Your Bathroom. 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. Tiling Project Guide. I plan on replacing some studs and sistering others. Install the liner over a pre-sloped bed, as I explain here. In the mixing tray, mix the mortar with water, using a garden hoe. The curb is the open entry point where the user enters the shower. If it leaks, it fails. KERDI-DRAIN grates are available in four stylish designs and multiple finishes. Contact us: 888-472-4588 This is especially true when remodeling at an existing subfloor. This can be concrete or closed cell foam. I plan to use blocking, and I suppose I could put 2 pieces of blocking between each joist. To learn more, see our tips on writing great answers. Resting above the waterproof membrane is a second bed of mortar that generally follows the same contours as the preslope. I am putting in a whole new floor, joist and all, and the span is the 40". Unlike the surface of a concrete slab, wood subfloors may have irregularities or require additional fasteners at the area of a shower. Come join the discussion about tools, projects, builds, styles, scales, reviews, accessories, classifieds, and more! 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. Specifically designed for ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout. If you use the DITRA and cover the seems that should be waterproof so there really should not be moisture getting to the subfloor. Is there any way to alleviate the movement from the hangers? I beefed up all the supports. Waterproofing corners Schluter-KERDI-KERECK. 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. The first and most popular because of its affordability and ease of installation is paint-on latex waterproofing. Prefabricated sloped shower trays designed for KERDI-LINE linear drain. 3. The only time you won't need a pan is if you have a fully tiled wet room space without a shower enclosure. 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. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. Sign up for eletters today and get the latest how-to from Fine Homebuilding, plus special offers. 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. 2. Are you implying you would use pressure treated wood in the subfloor and not redgard it? You then need to make that mark at the same height all the way around the perimeter of your shower walls (figure 2). 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. Blocking allows you to run the waterproofing material up the sides of the shower, which creates the DIY shower pan liner. In such a high humidity environment, I'd remove the existing sub-floor and put in pressure treated plywood in the entire room. Depending on the size of the shower it doesn't always work, but it saves time if you can work it out that way. Learn more about the essentials of waterproofing. 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. 2. Although curbless showers that were originally meant for handicap showers has become more popular and more in demand. While cement backer boards are moisture-resistant, they are not waterproof. 1/2" is a bit thin to span that distance, although it should not be a problem with a concrete slab above it. The KERDI-SHOWER-LT/-LTS sloped shower trays feature integrated waterproofing and are designed to integrate with KERDI-LINE drains. 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. 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. Test fit shower pan drain housing into subfloor bore hole. Alternatively, add small amounts of mortar to fill the low spot and repeat the process. This includes mud-floated showers. 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. You'll need various materials for a shower pan to build up several layers. Code requires that lining materials in field-built shower pans slope 1/4 in. Is it safe to publish research papers in cooperation with Russian academics? The downside of these finishes is that they arent themselves waterproof. They might begin to flex a bit, which may need a fix. . See Recessing the Shower Floor Technical detail here. To do this, add a quart of water to the bucket or tub and pour in some of the dry mortar. 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. The same answer, I presume, is applicable to a dry pack pan as well? Install the shower wall tile backer board and place the top mortar bed. DITRA performs all these functions while still providing adequate support/load distribution for the tile covering. 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. 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. The best answers are voted up and rise to the top, Not the answer you're looking for? If the subfloor is completely flat and level, proceed to step 3. Walk-in showers are large showers that can either be created from scratch or built using premanufactured pans and wall panels sold as kits. 3. Various sizes are available to accommodate both center drain and perimeter drain placement. In this photo it is (or close enough to) 4 3/4. 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 . For a seat designed for sitting, that hazard could be argued as bather beware if he chooses to stand on it. Press the material firmly into the silicone on the shower drain. 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 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. Continuing Education for Architects & Designers. 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. All trays feature integrated KERDI waterproofing and are available in several sizes to fit a variety of shower configurations. Build a high border around the perimeter of the shower, about 1/4-inch below the tile top perimeter line. Waterproofing membrane and vapor retarder: Schluter-KERDI, 4. His hobbies include horses, motorcycles, road racing and sport fishing. What were the most popular text editors for MS-DOS in the 1980s? The dimensions will be about 40" x 10' (mud shower pan over entire area). Mix a batch of skimming mortar in a bucket or mixing tub, using fresh water and a wooden trowel. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. 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. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. The trays can easily be cut to size with a utility knife, or they may be extended with dry-pack mortar. With a screw gun, install 2-inch deck screws alongside each existing nail or screw to securely fasten the subfloor to the joists. It would always be wise to waterproof the seat in some manner. If it comes apart, repeat the process. One side will be resting on a wall, the other side the joists will be hung using strong-ties or the like. Place the level across the pan or base to determine if it is level both ways. Upstairs shower pan on floor that bounces slightly. 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). Different options and thicknesses of DITRA membrane are available to best suit the needs of your project. Your email address will not be published. A piece of plywood can be purchased in 1/2 or 3/4 thickness, and most cement backer boards will be 1/4, 1/2, or 5/8 thick. After the sloped subbase is in, the liner can be installed. A secondary drain, mounted on the waterproof pan under the showers finished floor, drains this water away. Spread out thinset with the notched trowel and press the tile into the thinset. Should I use liquid water proofing membrane over a standard shower mud pan? 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 curb is between two inches and six inches above the level of the shower drain. 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. How to Replace Shower Pans in Fiberglass Showers, How to Convert a Tub-Shower Enclosure to a Freestanding Shower, Life of an Architect: How to Build a Shower That Won't Leak, Today's Homeowner: Installing Tile Over a Wood Subfloor, The Floor Elf: How to Create a Shower Floor, Houzz.com: Doorless Showers Open a World of Possibilities, How to clean a showerhead, according to an expert. 75mm) up to 75 mil (1. What to use to flatten and prep wall before installing Schluter Kerdi membrane for tiling? The entire room will be wrapped in Kerdi; walls, floor, ceiling Should I apply waterproofer on the subfloor beneath a shower pan? Cut the piece to length with a handsaw. The dimensions will be about 40" x 10' (mud shower pan over entire area). The KERDI-SHOWER-TS features an off-center drain placement and is 1-1/2" (38 mm) high. This may require the services of a qualified design professional (e.g., architect, engineer, etc.). JavaScript is disabled. Whatever the product, the liner must extend at least 2 in. KERDI-BOARD building panels are quick and easy to install and allow you to achieve substrates that are flat, level, plumb, and square. 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. Prefabricated shower tray: Schluter-KERDI-SHOWER-T/-TS/-TT, 3. Shower pan membrane typically comes in thicknesses from 30 mil (0. higher. 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. Shower basins are called pans, floors, or receptors. It is going to be 4 tall or so from the bathroom floor. You should end up with material leading to the edge of your framed walls and shower curb. The KERDI-SHOWER-T is offered in five sizes with perimeter heights ranging from 1-3/32" (28 mm) to 1-1/4" (32 mm). By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Seal the shower liner to the shower drain. 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. I removed these and droped the 3/4 OSB subfloor only in the shower area. Measuring it at that point. There's nothing you can use instead of a shower pan in an enclosed shower. If necessary, lift the pan or base out of the way and install additional deck screws or level a low spot. The top shower pan floor covering is the tile. I think our shower tile guy made this base too thick. Market Research for Exporting to the U.S. Catalina 2021 Ceramic and Stone Tile Market Report, Kitchen and Bath Cabinets Countertops Reports. This provides the bonding element for the concrete and gives it something to hold onto. Uncoupling and waterproofing membrane: Schluter-DITRA. Unless you waterproof the entire room floor, walls, and ceiling, steam induced moisture is going to penetrate SOMEWHERE to wood. Different options and thicknesses of DITRA membrane are available to best suit the needs of your project. The modal window is a 'site map' of the most critical areas of the site. The combination of these four essential functions allows for the successful installation of tile over a wide range of substrates, including plywood/ OSB, concrete, gypsum, heated floors, etc. 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. tar command with and without --absolute-names option, Embedded hyperlinks in a thesis or research paper. 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. Get complete site access to expert advice, how-to videos, Code Check, and more, plus the print magazine. 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. Yes, it is important to lay subfloor down before installing a shower pan in the bathroom. higher than the drain, but not more than 9 in. The flange is fusion welded to the perimeter of the shower base's core. Different options and thicknesses of DITRA membrane are available to best suit the needs of your project. 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. 1. 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. Top-quality cast iron shower pans are very costly yet also very durable and can last for decades. DO NOT SAND, CUT, OR MAKE ANY CHANGES/MODIFICATIONS TO THE SURFACE OF THE SHOWER PAN WHATSOEVER. Install Subfloor Based on the comments to this answer, updated answer: Since you're waterproofing the entire room, its not essential. Prefabricated sloped shower tray: Schluter-KERDI-SHOWER-LTS, 3. Get home building tips, offers, and expert advice in your inbox. Cut out the hole for the shower drain. The first step is to determine the depth of the shower pan. rev2023.4.21.43403. Trusted, comprehensive guidance from the pros for a great-looking tile job in any room of the house. Depending on the subfloor material, you will need to ensure it is sturdy enough to support the weight of a built up shower pan. above the finished threshold, whether its at the floor level or on a raised curb. >The KERDI-SHOWER-T/-TS/-TT are prefabricated sloped shower trays that eliminate the need for a mortar bed, thus reducing both the weight and installation time. Hassle with 5/8" first layer, especially with OSB, is that it's very easy to strip the hole with the screw.
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