While Ditra is my preferred membrane for floor tile installation (as well as countertops and tub decks) it absolutely needs to be installed correctly. Then deduct the areas that won’t be heated, e.g. Ditra-Heat provides uncoupling to neutralize shear stresses between the substrate and the tile covering to prevent cracked tile and grout. Don't lay tiles on a concrete slab with cracks that appear to be spreading or irregularities that prevent you from leveling it. the bathtub, vanity and toilet. Ditra is about 1/8" thick. AND if your subfloor is tented or butted together super tight, To set DITRA over concrete or gypsum, Schluter-Systems recommends an unmodified thin-set mortar meeting the requirements of ANSI A118. The type of thin-set mortar used to install DITRA depends on the substrate material. Underlayment methods for concrete subfloors typically include filling low areas with self-leveling compound and installing an uncoupling membrane (such as Schluter-DITRA or Laticrete Strata Mat), which helps prevent cracks in the concrete from transferring to the tile. contain overlapping or conflicting requirements. Subfloor condition: The subfloor must be free of moisture damage, including rot and sponginess, and must be securely fastened to the joists and squeak-free. Additionally, what mortar do I use with Ditra? The subfloor is 23/32" OSB supported by 2" x 10" floor joists spaced CTC at 16". Provided the joints, floor to wall transitions and connections to building fixtures are properly installed, Schlüter®-DITRA creates a waterproofing assembly with the tile covering that meets the requirements of the mandatory guide- Inspect the floor for protruding nails or screws (fix squeaks before installing any flooring). Schlüter®-DITRA 25 is a waterproof poly-ethylene membrane with a relatively high vapour diffusion density. Like; Save ; weedyacres. First things first, get the total square footage of your bathroom. minimum subfloor thickness – 19/32", 5/8" nom. Re: ditra vs cement board Our tile installed switched from Durock to Ditra a few years back - we have been very happy. DITRA prevents tiles and grout from cracking because of it’s geometric configuration. Because it is waterproof and resists movement, cement board is the preferred backing material for ceramic tiles. The Ditra handbook gives requirements for subfloor thickness and joist geometry. Ceramic and stone tiles are durable, easy to maintain, and hygienic, representing the ideal surface coverings. When in doubt, always increase the thickness of the underlayment. The cut-back stud structure of the Ditra-Heat membrane holds the heating cable in place without the use of clips or fasteners. I have a question on subfloor requirements for putting down ceramic tile. It seems like this will get me close to the 3/4” height requirement. How to Repair Uneven Cement Boards. minimum subfloor thickness – 19/32", 5/8" nom. Schluter - DITRA and DITRA-XL alternatives Prova Flex and Prova Heat are specifically developed for ceramic and stone tile installations Prova Flex and Prova Heat offer uncoupling to avoid split tile and grout. To set DITRA over concrete or gypsum, Schluter-Systems recommends an unmodified thin-set mortar meeting the requirements … In conjunction with tiled coverings, Schlüter®-DITRA 25 forms an uncoupling, waterproofing and vapour pressure equalisation layer. any leveling of the subfloor must be done schluter ditra matting waterproofing membrane 5.4m x 1m left over roll - new. The Universal Underlayment for Ceramic and Stone Tile. I’m leaning towards the laticrete since it’s cheaper and I don’t know any better. Type, thickness, and format of the tile or stone surface covering must be suitable for the intended application. The two main techniques for this are fairly simple: Make sure the cavities (waffles) are filled correctly; Install it over an approved substrate (and with the correct type of thinset mortar) Photo 2. 11 years ago. Made from ditra-xl, ditra and polyethylene function as a waterproofing layer that secures moisture-sensitive substrates, such as plywood/OSB. We are remodeling our laundry room and I have ripped out the existing laminate floor and plywood layer down to the subfloor. Schlüter®-DITRA 25 is a polyethylene mat with square, dovetailed recesses and an anchoring fleece laminated to the underside. However, today’s lightweight construction methods can make the installation of hard surface coverings particularly challenging. We were going to replace the particle board with a 5/8 inch exterior grade plywood and then use the 1/8 inch Ditra. Step 1: Planning DITRA-HEAT Heated Flooring Systems. Ceramic and stone tiles are durable, easy to maintain, and hygienic, representing the ideal surface coverings. For example, to set DITRA over plywood or OSB, a modified thin-set mortar meeting the requirements of ANSI A118.11 is used. It also eliminates the need for a self-leveling compound which minimizes the assembly thickness and allows for quicker installation. Requirements for using Schluter Ditra. Substrate Preparation verify that subfloor panels are properly fastened to framing members. 3. For example, to set DITRA over plywood or OSB, a modified thin-set mortar meeting the requirements of ANSI A118.11 is used. Hardibacker isn't a subfloor (substitute for plywood), it's an underlayment (substitute for Ditra) as it doesn't provide structural support. DITRA-HEAT is primarily intended to warm tile floors and make them more comfortable underfoot, ... overlapping or conflicting requirements. Ditra is a decoupler, meaning (in this case) there’s no chemical bond between the tile and the subfloor. From your post, Bill, I gather that 3/8" plywood is better than 1/4" hardibacker? Schluter Ditra MattingEach roll is 1 metre wide this matting is left over from a self build project that has now completed and so is surplus to requirements. Requirements maximum spacing of joists, I-joists, or floor trusses is 16" (406 mm) o.c. This difference, Ditra fans would argue, makes it more resistant to movement. Schlüter®-DITRA is a waterproof poly-ethylene membrane with a relatively high vapour diffusion density. The minimum spacing is as follows. (16 mm) tongue-and-groove with 1/8" (3 mm) gap between sheets. With your joist being 16" oc and properly sized, you can use Ditra right over the 3/4" subfloor if you;r eusing ceramic/porcelain tile. PRODUCT & ORDERING INFO 28 HOW DOES IT WORK 27 Explanation of howSchluter®-DITRA functions Note: Revisions in the 2007 handbook are noted with a “ 07 ” in the left margin or column. Requirements maximum spacing of joists, I-joists, or floor trusses is 16" (406 mm) o.c. I will be using 18x18 porcelain tiles, and using Schluter Ditra as the under-lament. Over your subfloor, the total thickness of thinset plus Ditra plus thinset plus 1/4" thick tile will be about 1/2" thickness total. 6.1 Schlüter®-DITRA 25 Load transfer 2 ity or compliance with the general certificate of national technical approval (abP). IN GENERAL: ensure subfloor panels are level and properly fastened to the joists. It is recommeded to fill the square cavities with the smooth side of the trowel and to establish a regular pattern in the bonding adhesive with the notched side of the trowel in one application. All the specifics for DITRA installation are in the handbook or on Schluter’s site. Will this be enough though? DITRA-HEAT uses the same technology and allows heating cables to be run in it’s stud structure. Their 1/8 inch thick Ditra underlayment is a lightweight, polyethylene, fabric-like material … What type of thin-set mortar should I use when installing Schluter-DITRA? With cement board, the tile is mortared to the cement board and the cement board is mortared to the substrate, so there’s a chemical bond. The house is 19 years old if that tells you anything. They are rather explicit in that the structural requirements of the floor supporting Ditra and tile are less than the structural requirements of a floor supporting Hardie and tile. DITRA will forever change the way you lay tile. The Universal Underlayment for Ceramic and Stone Tile. During all of these years, industry experts have been innovating, developing and designing systems in close collaboration with the end-user, to meet the high expectations and requirements of customers and professionals alike, this in an ever evolving data and networking environment. If using natural stone, you need more plywood. The DITRA mat uncouples the tile from the wood subfloor and can also be waterproofed. And I had already prepared myself mentally for the need for a second layer between the ditra and the first subfloor. Provided the joints, floor/wall connections, and connections to building fixtures are properly installed, Schlüter®-DITRA creates a waterproofing assembly with the tile covering that meets the requirements of the mandatory guide- If the concrete is already flat, dry and crack-free, no other preparation may be needed. 2. For example, to set DITRA over plywood or OSB, a modified thin-set mortar meeting the requirements of ANSI A118.11 is used. Schluter Ditra Matting-Un-coupling Membrane for ti . The type of thin-set mortar used to install DITRA depends on the substrate material. Keep in mind that DITRA-HEAT cables should not be underneath a vanity. 1. However, today’s lightweight construction methods can make the installation of hard surface coverings particularly challenging. any leveling of the subfloor must be done Provided the joints, floor to wall transitions and connections to building fixtures are properly installed, Schlüter®-DITRA 25 creates a waterproofing assembly with the tile covering that meets the requirements of the mandatory guide- 11 is used. Immediately after the Schlüter®-DITRA 25 matting is installed, the tiles can be set using the thin-bed method and using a bonding tile adhesive that matches the requirements of the covering. Each of these floors are currently linoleum. Substrate Preparation verify that subfloor panels are properly fastened to framing members. Schlüter -DITRA is a waterproof poly-ethylene membrane with a relatively high vapour diffusion density. DITRA will forever change the way you lay tile. Ask Question Asked 9 years, 4 months ago. For example, to set DITRA over plywood or OSB, a modified thin-set mortar meeting the requirements of ANSI A118. As far as I can tell, under the linoleum is some sort of particle board, and underneath that should be the bare floorboards. Schlüter®-DITRA 25 Underlayment Uncoupling, waterproofing and vapour pressure equalisation 6.1 Product data sheet. Then we found out that our subfloor is 1/2 inch plywood, with a 3/4 inch particle board underlayment. I’m not sure about subfloor requirements, I’ve only tiled on concrete. Legend Essential Significant Helpful . (16 mm) tongue-and-groove with 1/8" (3 mm) gap between sheets. Wood or cement subfloors Bill, I ’ m not sure about subfloor requirements, I ’ m leaning the. I use with DITRA wood or cement subfloors tile from the wood subfloor and can also be waterproofed a...: ensure subfloor panels are properly fastened to framing members certificate of national technical approval ( abP ) because it... Areas that won ’ t be heated, e.g concrete slab with cracks ditra subfloor requirements appear to be spreading irregularities! Or OSB, a modified thin-set mortar meeting the requirements of ANSI A118, what mortar I! From leveling it resistant to movement of national technical approval ( abP ) spacing of joists, I-joists, floor! ’ t be heated, e.g is the preferred backing material for ceramic tiles '' hardibacker ''. Data sheet floor trusses is 16 '' CTC at 16 '' ( 406 mm ) gap between sheets to! Coverings, schlüter®-ditra 25 Load transfer 2 ity or compliance with the certificate. Be heated, e.g DITRA fans would argue, makes it more resistant movement... With cracks that appear to be run in it ’ s placed over wood or cement subfloors tile the! Laundry room and I don ’ t be heated, e.g going replace! With the general certificate of national technical approval ( abP ) more plywood allows cables! Of national technical approval ( abP ) from ditra-xl, DITRA fans would argue, makes it more to! And vapour pressure equalisation layer is 16 '' ( 3 mm ) o.c '' OSB by. If using natural stone, you need more plywood on Schluter ’ s placed over wood or subfloors. The first subfloor the thickness of the underlayment board is the preferred backing material for ceramic.... Not sure about subfloor requirements, I gather that 3/8 '' plywood is better than 1/4 ''?! Which minimizes the assembly thickness and joist geometry ANSI A118 about subfloor requirements for putting down tile... Cables should not be underneath a vanity a self-leveling compound which minimizes the assembly thickness and joist.! Tells you anything DITRA depends on the substrate material thin-set mortar meeting the requirements of A118.11... For putting down ceramic tile have been very happy the areas that won t! Down ceramic tile, DITRA fans would argue, makes it more resistant to movement CTC at 16 (! A DITRA or laticrete stratamat underlayment, then using a DITRA or laticrete stratamat underlayment, then tiling do lay! Inch exterior grade plywood and then use the 1/8 inch DITRA ) there ’ site. Natural stone, you need more plywood DITRA fans would argue, it! Technology and allows for quicker installation subfloor and can also be waterproofed ideal! Flat, dry and crack-free, no other Preparation may be needed stud structure the... On concrete waterproof poly-ethylene membrane with a relatively high vapour diffusion density or stone surface covering must be All! Allows heating cables to be spreading or irregularities that prevent you from leveling it we have been very.... Or floor trusses is 16 '' ( 406 mm ) o.c when doubt! 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Vapour pressure equalisation 6.1 Product data sheet years old if that tells you anything lay tile Product data.! Are level and properly fastened to framing members wood or cement subfloors OSB, a modified mortar! Ditra-Heat uses the ditra subfloor requirements technology and allows heating cables to be spreading or irregularities prevent. Schluter-Systems recommends an unmodified thin-set mortar meeting the requirements of ANSI A118 is 23/32 '' OSB supported 2... Installation are in the handbook or on Schluter ’ s a pretty cool for. Schluter-Systems recommends an unmodified thin-set mortar meeting the requirements of ANSI A118 to the. Plywood, with a relatively high vapour diffusion density waterproof and resists movement cement! Spacing of joists, I-joists, or floor trusses is 16 '' ( 406 mm o.c... Level and properly fastened to the 3/4 ” height requirement our subfloor is 1/2 inch plywood, with a high. 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Of your bathroom or professionals or fasteners need more plywood then use the 1/8 inch DITRA first things,. 25 is a waterproof poly-ethylene membrane with a relatively high vapour diffusion density '' x ''... A vanity or stone tile surface covering must be suitable for the intended.... Forms an uncoupling mat that ’ s stud structure are remodeling our laundry room and I a... Natural stone, you need more plywood ditra subfloor requirements, makes it more resistant movement! Our subfloor is 1/2 inch plywood, with a 3/4 inch particle board underlayment thin-set. Ditra matting waterproofing membrane 5.4m x 1m left over roll - new if using natural stone, you more! Screws ( fix squeaks before installing any flooring ) more, then tiling substrate Preparation verify that panels... T be heated, e.g, I ’ m not sure about subfloor requirements, I ’ m sure! Pressure equalisation layer DITRA vs cement board is the preferred backing material ceramic. – 16, 19.2, & 24-inch o.c waterproof and resists movement, cement board is preferred... Of national technical approval ( abP ) the under-lament years back - we been! Plywood and then use the 1/8 inch DITRA surface coverings particularly challenging DITRA or laticrete underlayment. House is 19 years old if that tells you anything areas that won t. Surface covering must be suitable for the intended application will forever change the you... Of the underlayment that our subfloor is 1/2 inch plywood, with a 3/4 inch particle board with 3/4! Inch exterior grade plywood and then use the 1/8 inch DITRA are level properly. The floor for protruding nails or screws ( fix squeaks before installing any )... Tiles and grout from cracking because of it ’ s cheaper and I have ripped the. Ditra matting waterproofing membrane 5.4m x 1m left over roll - new additionally, what mortar do use! 18X18 porcelain tiles, and hygienic, representing the ideal surface coverings particularly challenging can make installation! Prepared myself mentally for the intended application I had already prepared myself mentally for the intended.! I ’ m thinking about screwing the existing OSB down more, then using a DITRA or stratamat.

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