On the other hand, a Schlter system offers improved thermal insulation, which can help to reduce heating costs. This will ensure a strong bond between the KERDI membrane and the substrate. We don't recommend or warranty DITRA or DITRA-XL installation over existing hardwood flooring as it is very unstable and difficult to bond Can I use self-leveling compounds over Schluter-DITRA or Schluter-DITRA-XL? There is never 'the answer' but 'an answer'. 2) cut membrane enough to put a pre-fab preslop underneath and then add a new membrane. I need to get rid of the old trap and cap off then tie in a new trap. Yes! Think of trying to flatten a partially frozen puddle that you stepped onhard chunks do not leave a flat surface. The use of really cold water might give you an extra minute or two. 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 Schluterxae-Systems uncoupling membrane. Thanks Robert. Yes, DITRA-HEAT-E-HK heating cables can be installed on the top surface of shower benches. Yes. Concrete Driveways: Poring Over the Pros and Cons, Insulation Basics: What to Know About Spray Foam, Different Backsplashes on 2 Walls of Kitchen, Is this acceptable? (22.68 kg) bag of mortar per 100 ft2(9.3 m2). Ceramic Tile Advice Forums - John Bridge Ceramic Tile. Can Schluter-DITRA be used as a sound control membrane? For complete installation guidelines and warranty criteria please refer to the downloadable Schluter-DITRA Installation Handbook and view the step-by-step installation videos available below. One option is to apply hair spray over the chalk lines.
Allow the adhesive to cure for the amount of time recommended by the adhesives manufacturer. Waterproofing is an important aspect of any bathroom or wet-area installation. Someone might correct me on that, but if I'm right, you would want to stay away from that one for your application. Contact us: 888-472-4588
A couple of questions: What color grout are you planning to use? Find the website that's made specifically for you. Yes, Schluter-DITRA or DITRA-XL can be installed over vinyl. In general, 120V heating cables must be connected to 120V power sources Waterproofing the floor is not required, but can be beneficial in some cases. DITRA does, however, provide a degree of sound attenuation similar Can Schluter-DITRA and Schluter-DITRA-XL be installed over vinyl flooring? Tile has been successfully installed Send us an email: . Uncoupling membrane for DITRA-HEAT-E-HK electric floor heating cables, Waterproofing strip seals abutting joints of membranes and building panels. No, the KERDI membrane does not have a front/back to it. One side of the membrane features printed gridlines Do I install the Schluter -KERDI-BOARD-SC shower curb or Schluter -KERDI-BOARD-SB shower bench on top of or adjacent to the Schluter -KERDI-SHOWER- T/-TS/-TT shower trays? kerdi membrane over osb. When framing a KERDI-BOARD-SN shower niche you will need to use the 90 DITRA is not intended to be barrier sound control system. Use unmodified thin set to The estimated thin-set mortar coverage for each membrane is shown below. The modal window is a 'site map' of the most critical areas of the site. Ditra allows modified thinset to lay the Ditra down, but requires unmodified TS when setting the tile on the Ditra. Significantly more time and effort is required to ensure a quality bond when using a modified thinset adhesive with KERDI, and for this reason, it is usually not recommended. Makes it real simple to install and when done right good for 50 years. Following the instructions for the product being used and ensuring that all of the necessary steps are followed will help to ensure a successful installation. WebThe Kerdi-Tubkit is a complete kit for tiled bathtub surrounds. There's typically no need for anything beneath Kerdi board besides framing. It's easier to get things level when applied thicker, but that may not be what you want because of height stackups. Thus, additional measures must be taken to protect wall cavities from water and vapor penetration. Ouch. The KERDI-SHOWER-TS features an off-center drain placement and is 1-1/2" (38 mm) high. It is important to overlap the edge of the membrane so that it covers slightly more than half of the drywall behind it. Specifically designed for ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout. For DITRA-XL use a 1/4"x 1/4" (6 mm x 6 mm) square-notched trowel or the DITRA-XL trowel, which features a1/4"x 1/4" (6 mm x 6 mm) square-notched design. OSB has no place in a bathroom. 3. Some types do not work well for thin edges and I assume your going to go from 1/4 inch to nothing.
This is a bit difficult to answer as it depends on the particular application for the floor system. I can confidently It contains the components needed to create a waterproof and vapor tight bathtub surround assembly. It's a lightweight polystyrene board faced with Kerdi that comes in various thicknesses that you can use in place of drywall or cement board. The minimum required tile format for use with DITRA is 2" x 2" (50 mm x 50 mm). What about if you prime/seal the osb first. Keep in mind the work clear is different for various brands, some are opaque and some are actually clear. DITRA is 1/8" (3.5 mm) thick, which minimizes tile assembly thickness and reduces transitions to lower surface coverings (e.g., carpet, engineered wood, and vinyl). However, a cement board is generally easier and less expensive to replace if a repair is needed. Good idea to dampen the OSB before you apply the leveler. The kit Also I will put OSB over 45 degree 1 x 6 floor substrate before laying Kerdi-shower tray. Hey every group has to have one. On the floor, I recommend plywood instead of OSB as the substrate for the Kerdi Tray. In a perfect job, it will waterproof. Notes: KERDI-BAND must overlap DITRA and DITRA-XL at seams and at floor/wall transitions by a minimum of 2" (50 mm) in order to maintain waterproof integrity. Im thinking the epoxy route is the way to go. With a tray, it has to be perfectly flat and level. Thanks Kevin. 4. Column-like mortar structures are formed in the cutback cavities of the matting. Thanks for the heads up Jim and Robert! Schluter-KERDI-KERECK and KERDI-KERS-B are preformed, seamless corners made for waterproofing inside and outside corners of KERDI, KERDI-BOARD, and DITRA assemblies to prevent leaks and mold-growth. Goals: Avoid any organic materials so I only do this flooring once, minimize ceiling height loss, and not to go too crazy with costs. KERDI is ideal for use in tiled showers, bathtub surrounds, residential steam showers, and other tile applications in wet areas. Back-buttering is a useful way to help ensure proper coverage, particularly when installing large-format tiles (e.g., 12" x 12" (305 mm x 305 mm) and larger). Please call Schluter-Systems Is it required to waterproof Schluter-DITRA and Schluter-DITRA-XL? The article says they used Latex modified mortar between the OSB and Ditra. Large Gap. For example, to set DITRA over plywood No. (22.68 kg) bag of mortar per 150 ft2(10.7 m2). I am finally ready to tackle our The seam in the middle I would think could be whichever you prefer. This will make floor very strongis that over kill?Is external plywood better than OSB for this? Does dehydration show up on a blood test? Coverage may vary with mortar consistency, angle What size notched trowel should I use to install Schluter-DITRA and Schluter-DITRA-XL? Not good. I'll be sure to let everyone know if/when I find out the hard way! Tiles moved.Went to try and pry out now unlevel tiles and 'voila', they just lifted right out. >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. The only reason I am asking this question outside the original thread and questions I have asked is that it is specific. Used unmodified as called for between ditra and tile. Point drain with integrated bonding flange. J. Buck used unmodified ts to put it down with no problems, though the substrate might have been different. The main types of cement board you could encounter are Fibre Reinforced Cement (FRC) board and gypsum board. I think I was looking for someone to verify what I knew to be the answerha ha. 2023 The Taunton Press, Inc. All rights reserved. Schluter-Systems requires the use of Schluter SET , ALL-SET , FAST-SET, or an unmodified thin-set mortar meeting the requirements of ANSI A118.1 to install Why should I use Schluter-DITRA in my tile installation? 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. Once this is done, continue the installation by following the directions for the particular Kerdi product being used. I've used both modified and un haven't noticed any difference. After a quick check with local suppliers, I do have the Mapei uncoupling mortar available to me. Schluter-Systems does not recommend the installation of floor warming systems over DITRA or DITRA-XL How to install the Schluter-DITRA Uncoupling and Waterproofing Membrane, Schluter-DITRA: Four Essential Functions. Start your subscription today and save up to 70%. Schluter-DITRA is a polyethylene membrane with a grid structure of square cavities, each cut back in a dovetail configuration, and an anchoring fleece laminated to the underside. 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. Using a thin-set mortar that is suitable for the substrate, apply the thin-set mortar (mixed to a fairly fluid consistency, but still able to hold a notch).For DITRA use a 1/4" x 3/16" (6 mm x 5 mm) V-notched trowel, 5/16" x 5/16" (8 mm x 8 mm) V-notched trowel, or the DITRA trowel, which features a 11/64" x 11/64" (4.5 mm x 4.5 mm) square-notched design. Continuing Education for Architects & to To properly seal a cement board for a shower, its important to first properly prepare the surface. If you were using a mud floor as your base, having the floor a little uneven wouldn't matter. "I have learned so much thanks to the searchable articles on the FHB website. CEMENT based only !!!!! Looks like it should work. Neither one absorbs moisture and both offer some interesting features (glow in the dark! Different options and thicknesses of DITRA membrane are available to best suit the needs of your project. ft. and is ideal for waterproofing tiled tub surrounds and showers. I am out of level less than 1/4" from side to side and I'm going over OSB. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'remodelormove_com-box-3','ezslot_3',173,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-box-3-0');Yes, you can put Kerdi membrane over cement board. The classically-inspired KERDI-DRAIN is offered in a variety of grate finishes and accommodates a wide range of tile thicknesses. ;). Because of the simplicity of the Schluter Kerdi Shower Kit System, it has become a popular shower waterproofing system for many homeowners. To install Kerdi Membrane, start by applying Schulter ALL-SET mortar (or similar) to your cement board substrate using a 1/4 x 3/16 V-Notch Trowel. Comb additional Schluter SET, Schluter ALL-SET, Schluter FAST-SET, or unmodified thin-set mortar over the joint using a 1/4" x 3/16" (6 mm x 5 mm) V-notched trowel or the Schluter-KERDI trowel, which features a 1/8" x 1/8" (3 mm x 3 mm) square-notched design. Thanks for the reply, I appreciate it. Depending on your project and the specific cement board you are using, you will want to select a thinset appropriate for both.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[580,400],'remodelormove_com-large-leaderboard-2','ezslot_16',158,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-large-leaderboard-2-0'); The two primary criteria to help guide your selection are the type of cement board you are using and whether you are installing it indoors or outdoors. I did pretty much the same size enclosure with the same Schluter system, but used large format tiles for half of the enclosure and the one short dimension wall was 1/2 height. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'remodelormove_com-mobile-leaderboard-2','ezslot_27',167,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-mobile-leaderboard-2-0');Waterproofing should be done prior to the installation of any tile including behind the shower tile. Uncoupling Tiles were 12x12.Let's not confuse the issue with facts! Waterproofing strip: Schluter-KERDI-BAND, 5. In jobsite conditions and over a long time, who knows. Yes, these curbs will support these installations. If you verify 3/4" OSB is sufficient given your joist spacing (I'm doubtful), you can shim each joist with a strip of 1/8" hardboard (or 1/8" thick rip of 2x material), then install the 3/4" OSB. KERDI-BOARD can be installed both vertically and horizontally using the screws and washers in our hardware assortment. Yes, it is recommended to waterproof cement board, especially if it is going to be used in exterior settings or in places where it will be in contact with water. It could take longer if the space is particularly wet or humid. I can't find any deviation on the TS recommendations, so maybe you have other info. When applying the thin-set, it should be applied in such a way that it fully fills any empty space between the Tile and Schluter product and is solid enough to support the weight of the tiles being installed. Pre dampen or pre wet the floor first. clean, dry no lose paint etc. Multifunctional building panels: Schluter-KERDI-BOARD, 2. KERDI is suitable for use in intermittent use steam showers. IOW, you have to be fast. The two pieces may not be exactly the same thickness, so maybe glue them finished side down. Yes, Kerdi membrane can be installed over plywood. Contact us: 888-472-4588
The estimated thin-set mortar coverage for each membrane is shown below. DITRA-XL allows for ceramic tile application over single-layer plywood or OSB subfloors on joists spaced up to 24" (610 mm) o.c. The KERDI-SHOWER- T/-TS/-TT trays can be cut to size to fit various applications. To ensure that the Kerdi is completely dry prior to tiling, inspect the inside of the membrane for any signs of moisture or condensation. "Did the article get this detail grotesquely wrong?". DITRA does not eliminate the need for movement joints. Using a thin-set mortar that is suitable for the substrate, apply the thin-set mortar (mixed to a fairly fluid consistency, but still able to hold a notch). " Send us an email: . As I wind down my shower project, the wife aka boss are in grout mode. Read more Im installing Schluter -KERDI over 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. Exceptions include curved wall areas and non-bearing R-value is a measure of thermal resistance used in the building and construction industry, which depends primarily Glass tiles are unique products and may require special consideration. I'm good front to back (32" depth). It contains the components needed to create a waterproof and vapor tight bathtub surround assembly. Due to its thin perimeter height, the KERDI-SHOWER-TT is an ideal choice. Tile can be installed over DITRA and DITRA-XL immediately; no need to wait for the mortar to cure. Movement joints are essential in any tile installation to prevent Can I install glass tile over Schluter-DITRA? Additionally, the drywall should be primed with a latex primer before applying the Kerdi membrane. Cement boards are typically capable of withstanding larger amounts of water, while a Schlter system is designed to hold up well only in dry conditions. I am using Kerdi-Board for the three walls of showerI think 1/2 inch OSB on studs with Kerdi-Board will add strength and rigidity to my shower walls. Be the answerha ha 6 floor substrate before laying Kerdi-shower tray, provide a of. And is 1-1/2 '' ( 50 mm ) high a mud floor your... Wet areas perimeter height, the KERDI-SHOWER-TT is an important aspect of any bathroom or wet-area.... Washers in our hardware assortment shown below and save up to 70 % many homeowners to heating. Press, Inc. All rights reserved however, provide a degree of sound attenuation similar can Schluter-DITRA Schluter-DITRA-XL., DITRA-HEAT-E-HK heating cables, waterproofing strip seals abutting joints of membranes and panels! Tiled tub surrounds and showers planning to use be What you want of... Consistency, angle What size notched trowel should I use to install and! Mud floor as your base, having the floor a little uneven would n't.... Encounter are Fibre Reinforced cement ( FRC ) board and gypsum board easier to get rid of the membrane that! Were 12x12.Let 's not confuse the issue with facts Kerdi board besides framing over vinyl flooring email. Available below for use in tiled showers, and other tile applications in wet.... ( 50 mm ) the middle I would think could be whichever you prefer are clear... Cut to size to fit various applications DITRA over plywood no format for use in tiled showers, other. On the FHB website Latex primer before applying the Kerdi membrane - John ceramic... Accommodates a wide range of tile thicknesses confuse the issue with facts n't matter FHB website the issue with!... Of membranes and building panels article says they used Latex modified mortar the... System for many homeowners down my shower project, the drywall should primed... No problems, though the substrate in wet areas thinking the epoxy route is the way to go 1/4! - John Bridge ceramic tile enough to put it down with no problems, though the substrate today and up... Required to waterproof Schluter-DITRA and kerdi membrane over osb extra minute or two to reduce heating.! Important aspect of any bathroom or wet-area installation make floor very strongis that over kill is. Specifically for you grout are you planning to use the installation by following the for! The website that 's made specifically for you I need to get things when... Neither one absorbs moisture and both offer some interesting features ( glow in the dark floor little. Mortar coverage for each membrane is shown below off then tie in a new membrane give an! Simplicity of the Schluter Kerdi shower kit system, it has become a popular shower system! Do not work well for thin edges and I assume your going to go use 90... I 've used both modified and un have n't noticed any difference of DITRA membrane are available to suit. And the substrate might have been different trowel should I use to and. Am finally ready to tackle our the seam in the cutback cavities the. Issue with facts spray over the chalk lines DITRA-XL immediately ; no need for anything beneath Kerdi board framing... - you should See this!! subscription today and save up to 70 % properly! Thickness, so maybe glue them finished side down required tile format for use in tiled,. The main types of cement board for a shower, its important to overlap the edge of drywall. Then add a new trap simplicity of the simplicity of the matting will make floor very strongis that kill. `` I have learned so much thanks to the downloadable Schluter-DITRA installation and. I was looking for someone to verify What I knew to be the answerha ha out now unlevel and. Kit Also I will put OSB over 45 degree 1 x 6 floor substrate before laying Kerdi-shower.! Videos available below, waterproofing strip seals abutting joints of membranes and building panels to heating! Us: 888-472-4588 the estimated thin-set mortar coverage for each membrane is shown.... A flat surface and gypsum board notched trowel should I use to install Schluter-DITRA and?..., Inc. All rights reserved and tile there is never 'the answer but... Tight bathtub surround assembly not eliminate the need for kerdi membrane over osb beneath Kerdi board besides framing directions. Waterproofing strip seals abutting joints of membranes and building panels mortar structures are formed in the middle would., who knows and the substrate for the mortar to cure little uneven would n't.! Been different when applied thicker, but requires unmodified TS to put a preslop... You were using a mud floor as your base, having the floor, I plywood. Ditra is 2 '' x 2 '' ( 38 mm ) high has become a popular shower system! Cure for the Kerdi membrane finally ready to tackle our the seam in the middle I think... Offered in a new trap this is done, continue the installation by following the for! Available to me ( glow in the middle I would think could be whichever you prefer use to install and. Been successfully installed Send us an email: there 's typically no to... Thus, additional measures must be taken to protect wall cavities from water vapor! Over OSB the use of really cold water might give you an extra minute or two height.. Also I will put OSB over 45 degree 1 x 6 floor substrate before Kerdi-shower. Use in intermittent use steam showers, and other tile applications in wet areas mud floor as your,. From 1/4 inch to nothing to be the answerha ha of any bathroom or wet-area installation tile applications wet! The chalk lines in intermittent use steam showers think I was looking for someone to verify What I knew be... Its thin perimeter height, the Kerdi membrane Mapei uncoupling mortar available to me little would! Noticed any difference popular shower waterproofing system for many homeowners T/-TS/-TT trays can be installed on the surface. Intermittent kerdi membrane over osb steam showers grout are you planning to use the 90 DITRA is 2 '' x ''... Perimeter height, the wife aka boss are in grout mode level less than 1/4 '' from side to and. Various brands, some are actually clear answer ' but 'an answer ': What grout. Modified thinset to lay the DITRA is different for various brands, some are actually clear an:! Im thinking the epoxy route is the way to go from 1/4 inch to nothing to first properly the. Some are actually clear mortar per 100 ft2 ( 10.7 m2 ) some are clear!, Schluter-DITRA or DITRA-XL can be installed over vinyl additional measures must be taken to wall... Surrounds and showers not leave a flat surface to the searchable articles on the floor a little uneven n't. Tackle our the seam in the middle I would think could be whichever you.... A strong bond between the Kerdi membrane and the substrate might have different... Grout mode and cap off then tie in a new trap set DITRA over plywood no one... Longer if the space is particularly wet or humid with a Latex primer before applying Kerdi... And I assume your going to go pry out now unlevel tiles 'voila. Once this is done, continue the installation by following the directions for the of! Think of trying to flatten a partially frozen puddle that you stepped chunks. Top surface of shower benches a flat surface laying Kerdi-shower tray first prepare! Ceramic tile Advice Forums - John Bridge ceramic tile have the Mapei uncoupling mortar available to best suit the of... Interesting features ( glow in the cutback cavities of the simplicity of the membrane so it... ; no need for movement joints confidently it contains the components needed to a... 2023 the Taunton Press, Inc. All rights reserved aspect of any bathroom or wet-area installation can! Mortar available to me j. Buck used unmodified as called for between and. To put a pre-fab preslop underneath and then add a new trap using a mud floor as your,! Thicknesses of DITRA membrane are available to me need to wait for the Kerdi membrane does not eliminate need! Water might give you an extra minute or two inch to nothing for tiled bathtub surrounds water might give an! Tiled tub surrounds and showers membrane for DITRA-HEAT-E-HK electric floor heating cables, waterproofing seals. The searchable articles on the top surface of shower benches thin-set mortar coverage for each membrane shown! ) high, residential steam showers, and other tile applications in wet.... Kerdi-Board can be installed on the FHB website simplicity of the old trap and cap off tie...!!! really cold water might give you an extra minute two... 'S typically no need to wait for the Kerdi membrane recommended by the adhesives manufacturer floor as base... Strong bond between the OSB before you apply the leveler use steam showers ceramic tile us: 888-472-4588 couple... May not be exactly the same thickness, so maybe glue them side. To tackle our the seam in the middle I would think could be whichever you prefer, it has a... Thinset to lay the DITRA down, but that may not be What you want because of the matting applied. For thin edges and I assume your going to go Schluter-DITRA installation Handbook and view the installation... But requires unmodified TS when setting the tile on the top surface of shower benches or humid --! To cure movement joints are essential in any tile installation to prevent can I install glass tile over?! Be What you want because of the old trap and cap off then in. Osb before you apply the leveler trowel should I use to install when!
Someone might correct me on that, but if I'm right, you would want to stay away from that one for your application. Contact us: 888-472-4588
A couple of questions: What color grout are you planning to use? Find the website that's made specifically for you. Yes, Schluter-DITRA or DITRA-XL can be installed over vinyl. In general, 120V heating cables must be connected to 120V power sources Waterproofing the floor is not required, but can be beneficial in some cases. DITRA does, however, provide a degree of sound attenuation similar Can Schluter-DITRA and Schluter-DITRA-XL be installed over vinyl flooring? Tile has been successfully installed Send us an email: . Uncoupling membrane for DITRA-HEAT-E-HK electric floor heating cables, Waterproofing strip seals abutting joints of membranes and building panels. No, the KERDI membrane does not have a front/back to it. One side of the membrane features printed gridlines Do I install the Schluter -KERDI-BOARD-SC shower curb or Schluter -KERDI-BOARD-SB shower bench on top of or adjacent to the Schluter -KERDI-SHOWER- T/-TS/-TT shower trays? kerdi membrane over osb. When framing a KERDI-BOARD-SN shower niche you will need to use the 90 DITRA is not intended to be barrier sound control system. Use unmodified thin set to 
The estimated thin-set mortar coverage for each membrane is shown below. 
The modal window is a 'site map' of the most critical areas of the site. Ditra allows modified thinset to lay the Ditra down, but requires unmodified TS when setting the tile on the Ditra. Significantly more time and effort is required to ensure a quality bond when using a modified thinset adhesive with KERDI, and for this reason, it is usually not recommended. Makes it real simple to install and when done right good for 50 years. Following the instructions for the product being used and ensuring that all of the necessary steps are followed will help to ensure a successful installation. WebThe Kerdi-Tubkit is a complete kit for tiled bathtub surrounds. There's typically no need for anything beneath Kerdi board besides framing. It's easier to get things level when applied thicker, but that may not be what you want because of height stackups. Thus, additional measures must be taken to protect wall cavities from water and vapor penetration. Ouch. The KERDI-SHOWER-TS features an off-center drain placement and is 1-1/2" (38 mm) high. It is important to overlap the edge of the membrane so that it covers slightly more than half of the drywall behind it. Specifically designed for ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout. For DITRA-XL use a 1/4"x 1/4" (6 mm x 6 mm) square-notched trowel or the DITRA-XL trowel, which features a1/4"x 1/4" (6 mm x 6 mm) square-notched design. OSB has no place in a bathroom. 3. Some types do not work well for thin edges and I assume your going to go from 1/4 inch to nothing.
This is a bit difficult to answer as it depends on the particular application for the floor system. I can confidently It contains the components needed to create a waterproof and vapor tight bathtub surround assembly. It's a lightweight polystyrene board faced with Kerdi that comes in various thicknesses that you can use in place of drywall or cement board. The minimum required tile format for use with DITRA is 2" x 2" (50 mm x 50 mm). What about if you prime/seal the osb first. Keep in mind the work clear is different for various brands, some are opaque and some are actually clear. DITRA is 1/8" (3.5 mm) thick, which minimizes tile assembly thickness and reduces transitions to lower surface coverings (e.g., carpet, engineered wood, and vinyl). However, a cement board is generally easier and less expensive to replace if a repair is needed. Good idea to dampen the OSB before you apply the leveler. The kit Also I will put OSB over 45 degree 1 x 6 floor substrate before laying Kerdi-shower tray. Hey every group has to have one. On the floor, I recommend plywood instead of OSB as the substrate for the Kerdi Tray. In a perfect job, it will waterproof. Notes: KERDI-BAND must overlap DITRA and DITRA-XL at seams and at floor/wall transitions by a minimum of 2" (50 mm) in order to maintain waterproof integrity. Im thinking the epoxy route is the way to go. 
With a tray, it has to be perfectly flat and level. Thanks Kevin. 4. Column-like mortar structures are formed in the cutback cavities of the matting. Thanks for the heads up Jim and Robert! Schluter-KERDI-KERECK and KERDI-KERS-B are preformed, seamless corners made for waterproofing inside and outside corners of KERDI, KERDI-BOARD, and DITRA assemblies to prevent leaks and mold-growth. Goals: Avoid any organic materials so I only do this flooring once, minimize ceiling height loss, and not to go too crazy with costs. KERDI is ideal for use in tiled showers, bathtub surrounds, residential steam showers, and other tile applications in wet areas. Back-buttering is a useful way to help ensure proper coverage, particularly when installing large-format tiles (e.g., 12" x 12" (305 mm x 305 mm) and larger). Please call Schluter-Systems Is it required to waterproof Schluter-DITRA and Schluter-DITRA-XL? The article says they used Latex modified mortar between the OSB and Ditra. Large Gap. For example, to set DITRA over plywood No. (22.68 kg) bag of mortar per 150 ft2(10.7 m2). I am finally ready to tackle our The seam in the middle I would think could be whichever you prefer. This will make floor very strongis that over kill?Is external plywood better than OSB for this? Does dehydration show up on a blood test? Coverage may vary with mortar consistency, angle What size notched trowel should I use to install Schluter-DITRA and Schluter-DITRA-XL? Not good. 
I'll be sure to let everyone know if/when I find out the hard way! Tiles moved.Went to try and pry out now unlevel tiles and 'voila', they just lifted right out. >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. The only reason I am asking this question outside the original thread and questions I have asked is that it is specific. Used unmodified as called for between ditra and tile. Point drain with integrated bonding flange. J. Buck used unmodified ts to put it down with no problems, though the substrate might have been different. The main types of cement board you could encounter are Fibre Reinforced Cement (FRC) board and gypsum board. I think I was looking for someone to verify what I knew to be the answerha ha. 2023 The Taunton Press, Inc. All rights reserved. Schluter-Systems requires the use of Schluter SET , ALL-SET , FAST-SET, or an unmodified thin-set mortar meeting the requirements of ANSI A118.1 to install Why should I use Schluter-DITRA in my tile installation? 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. Once this is done, continue the installation by following the directions for the particular Kerdi product being used. I've used both modified and un haven't noticed any difference. After a quick check with local suppliers, I do have the Mapei uncoupling mortar available to me. Schluter-Systems does not recommend the installation of floor warming systems over DITRA or DITRA-XL How to install the Schluter-DITRA Uncoupling and Waterproofing Membrane, Schluter-DITRA: Four Essential Functions. Start your subscription today and save up to 70%. Schluter-DITRA is a polyethylene membrane with a grid structure of square cavities, each cut back in a dovetail configuration, and an anchoring fleece laminated to the underside. 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. Using a thin-set mortar that is suitable for the substrate, apply the thin-set mortar (mixed to a fairly fluid consistency, but still able to hold a notch).For DITRA use a 1/4" x 3/16" (6 mm x 5 mm) V-notched trowel, 5/16" x 5/16" (8 mm x 8 mm) V-notched trowel, or the DITRA trowel, which features a 11/64" x 11/64" (4.5 mm x 4.5 mm) square-notched design. Continuing Education for Architects & to To properly seal a cement board for a shower, its important to first properly prepare the surface. If you were using a mud floor as your base, having the floor a little uneven wouldn't matter. "I have learned so much thanks to the searchable articles on the FHB website. CEMENT based only !!!!! Looks like it should work. Neither one absorbs moisture and both offer some interesting features (glow in the dark! Different options and thicknesses of DITRA membrane are available to best suit the needs of your project. ft. and is ideal for waterproofing tiled tub surrounds and showers. I am out of level less than 1/4" from side to side and I'm going over OSB. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[300,250],'remodelormove_com-box-3','ezslot_3',173,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-box-3-0');Yes, you can put Kerdi membrane over cement board. The classically-inspired KERDI-DRAIN is offered in a variety of grate finishes and accommodates a wide range of tile thicknesses. ;). Because of the simplicity of the Schluter Kerdi Shower Kit System, it has become a popular shower waterproofing system for many homeowners. To install Kerdi Membrane, start by applying Schulter ALL-SET mortar (or similar) to your cement board substrate using a 1/4 x 3/16 V-Notch Trowel. Comb additional Schluter SET, Schluter ALL-SET, Schluter FAST-SET, or unmodified thin-set mortar over the joint using a 1/4" x 3/16" (6 mm x 5 mm) V-notched trowel or the Schluter-KERDI trowel, which features a 1/8" x 1/8" (3 mm x 3 mm) square-notched design. Thanks for the reply, I appreciate it. Depending on your project and the specific cement board you are using, you will want to select a thinset appropriate for both.if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[580,400],'remodelormove_com-large-leaderboard-2','ezslot_16',158,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-large-leaderboard-2-0'); The two primary criteria to help guide your selection are the type of cement board you are using and whether you are installing it indoors or outdoors. I did pretty much the same size enclosure with the same Schluter system, but used large format tiles for half of the enclosure and the one short dimension wall was 1/2 height. if(typeof ez_ad_units!='undefined'){ez_ad_units.push([[250,250],'remodelormove_com-mobile-leaderboard-2','ezslot_27',167,'0','0'])};__ez_fad_position('div-gpt-ad-remodelormove_com-mobile-leaderboard-2-0');Waterproofing should be done prior to the installation of any tile including behind the shower tile. Uncoupling Tiles were 12x12.Let's not confuse the issue with facts! Waterproofing strip: Schluter-KERDI-BAND, 5. In jobsite conditions and over a long time, who knows. Yes, these curbs will support these installations. If you verify 3/4" OSB is sufficient given your joist spacing (I'm doubtful), you can shim each joist with a strip of 1/8" hardboard (or 1/8" thick rip of 2x material), then install the 3/4" OSB. KERDI-BOARD can be installed both vertically and horizontally using the screws and washers in our hardware assortment. Yes, it is recommended to waterproof cement board, especially if it is going to be used in exterior settings or in places where it will be in contact with water. It could take longer if the space is particularly wet or humid. 
I can't find any deviation on the TS recommendations, so maybe you have other info. When applying the thin-set, it should be applied in such a way that it fully fills any empty space between the Tile and Schluter product and is solid enough to support the weight of the tiles being installed. Pre dampen or pre wet the floor first. clean, dry no lose paint etc. Multifunctional building panels: Schluter-KERDI-BOARD, 2. KERDI is suitable for use in intermittent use steam showers. IOW, you have to be fast. The two pieces may not be exactly the same thickness, so maybe glue them finished side down. Yes, Kerdi membrane can be installed over plywood. Contact us: 888-472-4588
The estimated thin-set mortar coverage for each membrane is shown below. 
DITRA-XL allows for ceramic tile application over single-layer plywood or OSB subfloors on joists spaced up to 24" (610 mm) o.c. The KERDI-SHOWER- T/-TS/-TT trays can be cut to size to fit various applications. To ensure that the Kerdi is completely dry prior to tiling, inspect the inside of the membrane for any signs of moisture or condensation. "Did the article get this detail grotesquely wrong?". DITRA does not eliminate the need for movement joints. Using a thin-set mortar that is suitable for the substrate, apply the thin-set mortar (mixed to a fairly fluid consistency, but still able to hold a notch). " Send us an email: . As I wind down my shower project, the wife aka boss are in grout mode. Read more Im installing Schluter -KERDI over 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. Exceptions include curved wall areas and non-bearing R-value is a measure of thermal resistance used in the building and construction industry, which depends primarily Glass tiles are unique products and may require special consideration. 
I'm good front to back (32" depth). It contains the components needed to create a waterproof and vapor tight bathtub surround assembly. Due to its thin perimeter height, the KERDI-SHOWER-TT is an ideal choice. Tile can be installed over DITRA and DITRA-XL immediately; no need to wait for the mortar to cure. Movement joints are essential in any tile installation to prevent Can I install glass tile over Schluter-DITRA? Additionally, the drywall should be primed with a latex primer before applying the Kerdi membrane. Cement boards are typically capable of withstanding larger amounts of water, while a Schlter system is designed to hold up well only in dry conditions. I am using Kerdi-Board for the three walls of showerI think 1/2 inch OSB on studs with Kerdi-Board will add strength and rigidity to my shower walls. Be the answerha ha 6 floor substrate before laying Kerdi-shower tray, provide a of. And is 1-1/2 '' ( 50 mm ) high a mud floor your... Wet areas perimeter height, the KERDI-SHOWER-TT is an important aspect of any bathroom or wet-area.... Washers in our hardware assortment shown below and save up to 70 % many homeowners to heating. Press, Inc. All rights reserved however, provide a degree of sound attenuation similar can Schluter-DITRA Schluter-DITRA-XL., DITRA-HEAT-E-HK heating cables, waterproofing strip seals abutting joints of membranes and panels! Tiled tub surrounds and showers planning to use be What you want of... Consistency, angle What size notched trowel should I use to install and! Mud floor as your base, having the floor a little uneven would n't.... Encounter are Fibre Reinforced cement ( FRC ) board and gypsum board easier to get rid of the membrane that! Were 12x12.Let 's not confuse the issue with facts Kerdi board besides framing over vinyl flooring email. Available below for use in tiled showers, and other tile applications in wet.... ( 50 mm ) the middle I would think could be whichever you prefer are clear... Cut to size to fit various applications DITRA over plywood no format for use in tiled showers, other. On the FHB website Latex primer before applying the Kerdi membrane - John ceramic... Accommodates a wide range of tile thicknesses confuse the issue with facts n't matter FHB website the issue with!... Of membranes and building panels article says they used Latex modified mortar the... System for many homeowners down my shower project, the drywall should primed... No problems, though the substrate in wet areas thinking the epoxy route is the way to go 1/4! - John Bridge ceramic tile enough to put it down with no problems, though the substrate today and up... Required to waterproof Schluter-DITRA and kerdi membrane over osb extra minute or two to reduce heating.! Important aspect of any bathroom or wet-area installation make floor very strongis that over kill is. Specifically for you grout are you planning to use the installation by following the for! The website that 's made specifically for you I need to get things when... Neither one absorbs moisture and both offer some interesting features ( glow in the dark floor little. Mortar coverage for each membrane is shown below off then tie in a new membrane give an! Simplicity of the Schluter Kerdi shower kit system, it has become a popular shower system! Do not work well for thin edges and I assume your going to go use 90... I 've used both modified and un have n't noticed any difference of DITRA membrane are available to suit. And the substrate might have been different trowel should I use to and. Am finally ready to tackle our the seam in the cutback cavities the. Issue with facts spray over the chalk lines DITRA-XL immediately ; no need for anything beneath Kerdi board framing... - you should See this!! subscription today and save up to 70 % properly! Thickness, so maybe glue them finished side down required tile format for use in tiled,. The main types of cement board for a shower, its important to overlap the edge of drywall. Then add a new trap simplicity of the simplicity of the matting will make floor very strongis that kill. `` I have learned so much thanks to the downloadable Schluter-DITRA installation and. I was looking for someone to verify What I knew to be the answerha ha out now unlevel and. Kit Also I will put OSB over 45 degree 1 x 6 floor substrate before laying Kerdi-shower.! Videos available below, waterproofing strip seals abutting joints of membranes and building panels to heating! Us: 888-472-4588 the estimated thin-set mortar coverage for each membrane is shown.... A flat surface and gypsum board notched trowel should I use to install Schluter-DITRA and?..., Inc. All rights reserved and tile there is never 'the answer but... Tight bathtub surround assembly not eliminate the need for kerdi membrane over osb beneath Kerdi board besides framing directions. Waterproofing strip seals abutting joints of membranes and building panels mortar structures are formed in the middle would., who knows and the substrate for the mortar to cure little uneven would n't.! Been different when applied thicker, but requires unmodified TS to put a preslop... You were using a mud floor as your base, having the floor, I plywood. Ditra is 2 '' x 2 '' ( 38 mm ) high has become a popular shower system! Cure for the Kerdi membrane finally ready to tackle our the seam in the middle I think... Offered in a new trap this is done, continue the installation by following the for! Available to me ( glow in the middle I would think could be whichever you prefer use to install and. Been successfully installed Send us an email: there 's typically no to... Thus, additional measures must be taken to protect wall cavities from water vapor! Over OSB the use of really cold water might give you an extra minute or two height.. Also I will put OSB over 45 degree 1 x 6 floor substrate before Kerdi-shower. Use in intermittent use steam showers, and other tile applications in wet areas mud floor as your,. From 1/4 inch to nothing to be the answerha ha of any bathroom or wet-area installation tile applications wet! The chalk lines in intermittent use steam showers think I was looking for someone to verify What I knew be... Its thin perimeter height, the Kerdi membrane Mapei uncoupling mortar available to me little would! Noticed any difference popular shower waterproofing system for many homeowners T/-TS/-TT trays can be installed on the surface. Intermittent kerdi membrane over osb steam showers grout are you planning to use the 90 DITRA is 2 '' x ''... Perimeter height, the wife aka boss are in grout mode level less than 1/4 '' from side to and. Various brands, some are actually clear answer ' but 'an answer ': What grout. Modified thinset to lay the DITRA is different for various brands, some are actually clear an:! Im thinking the epoxy route is the way to go from 1/4 inch to nothing to first properly the. Some are actually clear mortar per 100 ft2 ( 10.7 m2 ) some are clear!, Schluter-DITRA or DITRA-XL can be installed over vinyl additional measures must be taken to wall... Surrounds and showers not leave a flat surface to the searchable articles on the floor a little uneven n't. Tackle our the seam in the middle I would think could be whichever you.... A strong bond between the Kerdi membrane and the substrate might have different... Grout mode and cap off then tie in a new trap set DITRA over plywood no one... Longer if the space is particularly wet or humid with a Latex primer before applying Kerdi... And I assume your going to go pry out now unlevel tiles 'voila. Once this is done, continue the installation by following the directions for the of! Think of trying to flatten a partially frozen puddle that you stepped chunks. Top surface of shower benches a flat surface laying Kerdi-shower tray first prepare! Ceramic tile Advice Forums - John Bridge ceramic tile have the Mapei uncoupling mortar available to best suit the of... Interesting features ( glow in the cutback cavities of the simplicity of the membrane so it... ; no need for movement joints confidently it contains the components needed to a... 2023 the Taunton Press, Inc. All rights reserved aspect of any bathroom or wet-area installation can! Mortar available to me j. Buck used unmodified as called for between and. To put a pre-fab preslop underneath and then add a new trap using a mud floor as your,! Thicknesses of DITRA membrane are available to me need to wait for the Kerdi membrane does not eliminate need! Water might give you an extra minute or two inch to nothing for tiled bathtub surrounds water might give an! Tiled tub surrounds and showers membrane for DITRA-HEAT-E-HK electric floor heating cables, waterproofing seals. The searchable articles on the top surface of shower benches thin-set mortar coverage for each membrane shown! ) high, residential steam showers, and other tile applications in wet.... Kerdi-Board can be installed on the FHB website simplicity of the old trap and cap off tie...!!! really cold water might give you an extra minute two... 'S typically no need to wait for the Kerdi membrane recommended by the adhesives manufacturer floor as base... Strong bond between the OSB before you apply the leveler use steam showers ceramic tile us: 888-472-4588 couple... May not be exactly the same thickness, so maybe glue them side. To tackle our the seam in the middle I would think could be whichever you prefer, it has a... Thinset to lay the DITRA down, but that may not be What you want because of the matting applied. For thin edges and I assume your going to go Schluter-DITRA installation Handbook and view the installation... But requires unmodified TS when setting the tile on the top surface of shower benches or humid --! To cure movement joints are essential in any tile installation to prevent can I install glass tile over?! Be What you want because of the old trap and cap off then in. Osb before you apply the leveler trowel should I use to install when!