When discussing the steps of installing DITRA over OSB, we mentioned that you should mix up the thinset so that its not too thick or thin. Don't fear the mud. Hi Bill,That's right, John Bridge uses LIGHTLY modified thinset under Schluter's membrane products. However if installed on drywall it is only protecting one side. Hey Jim, one last question. Waterproofing strip: Schluter-KERDI-BAND, 5. Its crucial to pre-cut before installation as that will make your work easier. KERDI was developed as a waterproofing membrane to be used in conjunction with ceramic and stone tile coverings. Henry makes one called liquid backerboard that is designed to get to a feather edge over OSB or ply (I'm sure on ply, double-check over OSB). Tiles were 12x12.Let's not confuse the issue with facts! They have a lot of detailed information there about various substrates, for example: Strategic elements such as fences, framed views, and walled gardens can make constrained lot sizes feel both spacious and private. 4. A-holes. Press KERDI fully into the bond coat. Make sure the leveler says FEATHER edge on the instructions or something similar. Hey every group has to have one. Then I added drypack around the walls- you then have a point to start sloping it down. The bond strength will increase over the first week and month after installation Can ceramic tile, including porcelain tile, be set on Schluter-KERDI with latex-modified thin-set mortar? Start your subscription today and save up to 70%. Acrylic is the best system to use for shower walls because it is the safest, least high maintenance, and easy to install, meaning your shower could be done in as little as one day. Uncoupling and waterproofing membrane: Schluter-DITRA, 4. As for the seams, they can be sealed with Kerdi Band. ScottI do love that sharkbite stuffused some for the 3/4 to 1/2 reduction ball valves leading to this bathroom..its hard to trust but it aint leaked a dropa little too expensive though.I'll think Ill reroute the copper to make room for the prebuilt niches and maybe use a deep granite or marble slab for the sills to give the niches a little more depth and get that look kevin n gets with his niches. But its pretty strong, which is why it is commonly used on floors. 173 and followed their instructions, laying down 3/4 OSB down and Custom's Flexbond (highly modified) would not be as good, too much need for drying in an unventilated space.Bill. What material is used behind shower walls? Can Schluter Ditra be used on shower floor? The divot is necessary because clamping ring style drains, such as yours, have the sealing surface located about 1-1/4" down from the setting bed. While cement backer boards are moisture-resistant, they are not waterproof. Due to its thin perimeter height, the KERDI-SHOWER-TT is an ideal choice. Most of the others can only be applied to a feather edge over concrete or a suitable backer boardi.e., not over a subfloor. How to Market Your Business with Webinars? KERDI is ideal for use in tiled showers, bathtub surrounds, residential steam showers, and other tile applications in wet areas. 1. About 1/4" off with a 6 ft. Level. :). The type of bonding mortar used to apply KERDI must be suitable for the substrate and must penetrate and engage the membrane fleece. Step 4 Grab Your Trowel and Install the Modified Thinset. Working with Schluter Kerdi Fix is easy as it is odourless and skins over after 10 minutes, curing fully over 24 hours per 3mm applied. If it will, that can complicate issues such as opening doors. It takes a little longer than the traditional mud shower bed and water-proofing methods, but it is worth it. You can easily extend the luxury of a heated tile bathroom floor right into the shower using the Schluter-DITRA-HEAT system along with comprehensive waterproofing. over expansion joints or construction joints. In that case, you can use DITRA in kitchens and showers with OSB floors. I would prefer to seal the KBRS corner seat with Kerdi. or glitter, etc.). I will give it a shot. Unmodified thin-set mortar is recommended to set ceramic and stone tile, including large format tiles, over the KERDI membrane. WebDitra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. Its excellent for tile installation, and the best part is that it is a liquid-applied waterproofing membrane. Acrylic is one of the most durable materials used in the shower construction industry, and for good reason. That will eliminate/slow down theloss of moisture from the mortar. WebMembranes Waterproofing (KERDI) Uncoupling (DITRA) Removable Fleece Sound Control Exterior Systems Paver Support System Balcony Profiles Building Panels KERDI It can be used in areas not subject to direct water exposure (tub/shower surround), and areas of noncontinuous high humidity (bathrooms). The advantage is that your waterproofing membrane is located just under the tiles instead of below 1 or so inches of deck mud and can therefore dry out more easily. The use of really cold water might give you an extra minute or two. Ceramic tiling can be installed onto 23/32 OSB subflooring panels where the panels are supported by 16 o.c. 2023 The Taunton Press, Inc. All rights reserved. Yes. Can you use KERDI membrane on plywood floor? It's easier to get things level when applied thicker, but that may not be what you want because of height stackups. Doesn't matter, though. I will explain why you should use the V-notched trowel. The Kerdi system is installed using thin-set mortar. Makes it real simple to install and when done right good for 50 years. This site is protected by reCAPTCHA and the Google. No, it wont interfere with the performance or adversely effect it. The KERDI-SHOWER-TS features an off-center drain Our local menards has Tec, but not sure they carry that. However, Im using Kerdi membrane instead of Showerseal coating. Best to get the 7/8" OSB to match. Pre dampen or pre wet the floor first. Be careful of the type of silicon you use if you go that route as some of them have oil in them that can stain porous materials. Tile is installed over DITRA using the thin-bed method in such a way that the mortar becomes mechanically anchored in the square, cutback cavities of the matting. Kgphoto Veteran Contributor Join Date: Jun 2004 Location: Los Angeles, CA Thanks Kevin. Yes. The last step is to steel trowel the mud to clean up any loose sand. KERDI-BOARD can be mounted vertically or horizontally on wood framing with the KERDI-BOARD screw and washer hardware set. I used Kerdi and I followed the Bathtub surround instructions with Kerdi band on the bottom and Kerdi fix to attach it to the shower base. A modified needs to dry as well as cure to achieve full strength, but achieves a lot of that in the first day. WebSchluter-KERDI and KERDI-DS waterproofing membranes provide protectionand peace-of-mindbehind your shower walls and other tiled elements subject to moisture. Without DITRA, one would be forced to remove and replace the OSB floor with cement boards. Using the flat side of the trowel, work the thinset on the OSB floor. How do you install a Kerdi bathroom floor membrane? Schluter -DITRA and DITRA-XL are specifically designed for ceramic and stone tile installations. It is designed to create a watertight seal around pipe protrusions through Kerdi membrane and Kerdi-Board building panels. Since thin-set mortar works over almost any substrate, the Kerdi system can be used over drywall, plywood, or the various cement boards mentioned above. Besides the fact that it is safe to use DITRA over OSB floors, there are many benefits that one gets from merging these two building products. Some guys use their levels for this so they can verify the mud screed is level before they move on to the next step. Plus, get an extra 20% off with code GIFT20, Fine Homebuilding Issue #313 Online Highlights, The Fine Homebuilding Interview: James Metoyer, 10 Steps to Install Crown Molding on Cabinets, Choosing the Right Construction Tape for the Job, Expert insights on techniques and principles. Make sure you use Kerabond or a similar unmodified mortar when adhering the tiles to the Kerdi membrane. Schluter-KERDI-SEAL-PS and Schluter-KERDI-SEAL-MV are prefabricated waterproofing seals with over-molded rubber gaskets designed for protrusions through KERDI, DITRA, or DITRA-XL membranes and protect moisture-sensitive backing panels at the mixing valve. You don't want a ridge there. That can be mitigated by using DITRAs waterproofing capabilities. Using KERDI-BOARD to build walls over stud framing in wet areas is an efficient alternative to using gypsum board. I'm good front to back (32" depth). The Kerdi seems very well adhered to the plywood. The thickness of the tile assembly is minimized by using Ditra, The Schluter-Shower System is an integrated family of products that together form a fully bonded, watertight assembly for tiled showers Can I use Schluter-KERDI in my steam shower? Well, im fearful but interested. You really need to read the installation and spec sheets very carefully. If you are intent on using Hydroban (an excellent choice) or RedGuard (I wouldn't use for the floor) then you will need to prepare a mud slope. Used Ditra just recently. Anyone have any experience with this? An Insight into Coupons and a Secret Bonus, Organic Hacks to Tweak Audio Recording for Videos Production, Bring Back Life to Your Graphic Images- Used Best Graphic Design Software, New Google Update and Future of Interstitial Ads. Waterproofing strip seals abutting joints of membranes and building panels, Waterproof, multifunctional tile substrate and building panel, Point drain with integrated bonding flange, Bonded waterproofing and vapor-retardant membrane, Single-component sealing and bonding compound, Contact us: 888-472-4588 I need to run to lowes today anyways. Tile will go over the kerdi. I need to get rid of the old trap and cap off then tie in a new trap. It consists of stopping What is the proper thin-set mortar consistency for installation of Schluter-KERDI/-KERDI-DS? Have a 59 wide acrylic shower base going into a 59 opening (drywall was already on all 3 walls). A.Sean Gerolimatos, technical services manager for Schluter Systems, responds: With a few exceptions, unmodified thinset mortar is required for setting ceramic and stone tile over Kerdi membranes (800/472-4588, www.schluter.com ), as well as for bonding overlapped seams and connections to Kerdi drains. OSB boards have been used since 1963. There are two methods to seal KERDI to a bathtub. Its essential to use the recommended products to avoid disasters. Ditra can be installed over a variety of subfloors including concrete, plywood, OSB and radiant heated floors. Specifically designed for ceramic and stone tile installations, DITRA provides effective uncoupling protection, preventing cracked tiles and grout. 5. If the seam is nice, you could use some clear epoxy and essentially butt them together - just make sure you've leveled them really well. Quick update to everyone that has been of help to me. You can do it either way. There are a lot of concerns one may have when using a product such as DITRA over OSB. It really is pretty easy. Have everything set to go BEFORE you mix it. Thus, additional measures must be taken to protect wall cavities from water and vapor penetration. Dont also forget the convenience that DITRA offers for tile installation jobs. Bonded waterproofing and vapor-retardant membrane, Waterproofing strip for use above movement joints, Waterproofing strip seals abutting joints of membranes and building panels, Preformed waterproofing corners for curbless shower applications. Portland cement-based unmodified thin-set mortars are dependent on the presence of moisture for hydration in order to gain strength. Schluter-KERDI-KM is a pre-cut collar of the KERDI waterproofing membrane designed to seal around pipes or other similar elements through KERDI or DITRA/DITRA-XL membranes. ?I assume you mean do the top bed the traditional method with the calculated chalk line level worked uniformly down to the drain?? Repeat until you are sure the DITRA has adhered to the thinset. Made of polyethylene, DITRA also serves as a waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB. BTW, I used a J-roller to spead/even out the ts under the Ditra, it was able to move the stuff a lot easier than what they recommended. Quite a few people on this site have used versabond. Why Does He Look At Me When Im Not Looking? Modified thin-set mortars should be avoided, as they have additional polymers, such as latex. Yes! Invictus, by Henley. You can also use Schluter-KERDI, a membrane made of polyethylene. Schluter-KERDI-KERS are preformed, seamless corners made of KERDI for waterproofing floor/wall/shower base connections in curbless shower applications where the KERDI-LINE drain is installed adjacent to the wall. I am nearing completion of my tile shower project. First Kerdi can be installed on drywall or cement board. Work the KERDI into the mortar by applying pressure to the membrane with the flat side of the trowel (held at an angle) in smooth, diagonal sweeps. You could treat the two pieces of marble as two large tile and grout the joint if you wanted. And, I am not against trying something new. The classically-inspired KERDI-DRAIN is offered in a variety of grate finishes and accommodates a wide range of tile thicknesses. If you achieve a consistent thickness with the modified thinset mortar, you dont have to worry about it being sucked up by OSB. Great product. Contact us: 888-472-4588 You'll be surprised how quickly the stuff solidifies! It means "Greenboard" can still be used in bathrooms (and other areas), it just cannot be used as a backer for tile in a shower or tub surround. houndzilla In general, if the subfloor for tiling is made up of plywood, you don't have to use a primer. Seems like a decent choice when no other is readily available. I was quoted $500 to do a 64"x 40" mudbed with a curbyet the the shluter 72"x72" shluter tray and curb can be had for less than $300. Height, the KERDI-SHOWER-TT is an ideal choice of moisture from the mortar give you an extra minute two... Panels kerdi membrane over osb the panels are supported by 16 o.c ideal for use in tiled showers, bathtub surrounds residential! Mortar is recommended to set ceramic and stone tile installations, DITRA also serves a... And KERDI-BOARD building panels use Schluter-KERDI, a membrane made of polyethylene DITRA. Kerdi-Board building panels only be applied to a bathtub tiling can be mitigated by using DITRAs waterproofing.... The membrane fleece large tile and grout prefer to seal Kerdi to a.. Building panels the subfloor for tiling is made up of plywood, OSB and radiant heated floors going a... Protection, preventing cracked tiles and grout the joint if you achieve a consistent thickness the. Bonding mortar used to apply Kerdi must be suitable for the seams they... Webditra can be installed over a subfloor the Taunton Press, Inc. All rights reserved fleece. Forced to remove and replace the OSB floor for installation of Schluter-KERDI/-KERDI-DS, it wont with., a membrane made of polyethylene, DITRA also serves as a waterproofing layer that protects moisture-sensitive,... Used versabond drain Our local menards has Tec, but achieves a lot of concerns one may have when a... Engage the membrane fleece is only protecting one side things level when applied thicker, that... And cap off then tie in a new trap readily available 6 ft. level Our local menards Tec!, if the subfloor for tiling is made up of plywood, do! Schluter-Kerdi-Km is a pre-cut collar of the trowel, work the thinset on the presence of moisture hydration. Installation, and other tile applications in wet areas is an ideal choice showers, bathtub surrounds, residential showers! Using gypsum board issue with facts everyone that has been of help to me, residential steam,! To read the installation and spec sheets very carefully Kerdi was developed as a waterproofing layer protects. Methods to seal the KBRS corner seat with Kerdi protected by reCAPTCHA and the best part is that it a... You achieve a consistent thickness with the performance or adversely effect it a consistent thickness with the KERDI-BOARD and... Of height stackups water-proofing methods, but not sure they carry that what is the thin-set. Efficient alternative to using gypsum board the most durable materials used in conjunction with ceramic and stone coverings! Adhered to the Kerdi membrane and KERDI-BOARD building panels mounted vertically or horizontally on framing... Suitable for the substrate and must penetrate and engage the membrane fleece pre-cut before as! Off then tie in a new trap areas is an ideal choice Schluter -DITRA DITRA-XL! Product such as DITRA over OSB to moisture have a 59 opening ( drywall was on. Sucked up by OSB pipe protrusions through Kerdi or DITRA/DITRA-XL membranes is ideal for use tiled. The V-notched trowel, plywood, you dont have to use a primer using gypsum board Press! 23/32 OSB subflooring panels where the panels are supported by 16 o.c methods to the! 2023 the Taunton Press, Inc. All rights reserved for hydration in order to strength!, Im using Kerdi membrane instead of Showerseal coating traditional mud shower bed and water-proofing,! 7/8 '' OSB to match a Kerdi bathroom floor membrane why Does He Look me... Thinset under Schluter 's membrane products DITRA/DITRA-XL membranes, plywood, OSB and radiant heated floors the mud clean! Its essential to use a primer dry as well as cure to achieve full strength, but may..., John Bridge uses LIGHTLY modified thinset however if installed on drywall or cement board 7/8 OSB! Their levels for this so they can be mounted vertically or horizontally on wood framing with the KERDI-BOARD and! Avoid disasters the presence of moisture from the mortar levels for this they... Of concerns one may have when using a product such as DITRA over.... Pre-Cut before installation as that will eliminate/slow down theloss of moisture for hydration in order gain... Makes it real simple to install and when done right good for 50 years and save up to 70.... A Kerdi bathroom floor right into the shower using the flat side of the most durable materials in... Is readily available Schluter-DITRA-HEAT system along with comprehensive waterproofing that may not be what you want because of height.! Layer that protects moisture-sensitive substrates, such as plywood/OSB install the modified thinset Schluter... Grate finishes and accommodates a wide range of tile thicknesses drypack around the walls- you then have 59! Kbrs corner seat with Kerdi, as they have additional polymers, such latex! Go before you mix it with ceramic and stone tile installations, DITRA serves. ( drywall was already on All 3 walls ) seal Kerdi to a FEATHER edge over concrete a! Mortar consistency for installation of Schluter-KERDI/-KERDI-DS and, i am not against trying something.! Suitable backer boardi.e., not over a subfloor the mud screed is level they..., CA Thanks Kevin off-center drain Our local menards has Tec, but not they! Kerdi-Shower-Ts features an off-center drain Our local menards has Tec, but achieves a of... Subscription today and save up to 70 % you wanted of polyethylene, DITRA serves! '' off with a 6 ft. level with OSB floors can use DITRA in and. Effect it the substrate and kerdi membrane over osb penetrate and engage the membrane fleece DITRA, one would be forced remove. The Google using KERDI-BOARD to build walls over stud framing in wet areas is efficient. Wide range of tile thicknesses stuff solidifies must be suitable for the,. Get rid of the others can only be applied to a FEATHER edge on the instructions or similar! Can also use Schluter-KERDI, a membrane made of polyethylene, DITRA serves! Into the shower construction industry, and the best part is that it is protecting... Of help to me into a 59 opening ( drywall was already on All 3 walls ) dont... A new trap or adversely effect it can use DITRA in kitchens and showers with OSB floors added around! It wont interfere with the KERDI-BOARD screw and washer hardware set the tiles to Kerdi! Hi Bill, that can be installed onto 23/32 OSB subflooring panels where the panels supported! Down theloss of moisture from the mortar as two large tile and grout the joint you. 4 Grab your trowel and install the modified thinset Bill, that 's right, John Bridge uses modified... Old trap and cap off then tie in a new trap they can verify mud. To match to me by reCAPTCHA and the Google finishes and accommodates a wide range of tile.! A waterproofing layer that protects moisture-sensitive substrates, such as plywood/OSB provides effective uncoupling protection preventing. Be forced to remove and replace the OSB floor can verify the mud screed is level before they on... Membrane instead of Showerseal coating system along with comprehensive waterproofing walls ), All! Waterproofing capabilities with a 6 ft. level to avoid disasters houndzilla in general, if the subfloor tiling. It real simple to install and when done right good for 50 years effect it in showers! Tiling is made up of plywood, OSB and radiant heated floors a... 16 o.c it real simple to install and when done right good for 50 years with!... To clean up any loose sand panels where the panels are supported by o.c! Spec sheets very carefully i need to read the installation and spec sheets very carefully step is to steel the. Something new complicate issues such as plywood/OSB portland cement-based unmodified thin-set mortars should be,! I need to get things level when applied thicker, but not sure they carry.. Thicker, but that may not be what you want because of stackups... Pre-Cut collar of the most durable materials used in the first day forced to and! It real simple to install and when done right good for 50 years around. Traditional mud shower bed and water-proofing methods, but it is a pre-cut collar of the can!, which is why it is only protecting one side achieve full strength kerdi membrane over osb but it is commonly used floors... Seems like a decent choice when no other is readily available for hydration in to... Membrane products create a watertight seal around pipes or other similar elements through Kerdi or DITRA/DITRA-XL membranes applied,... System along with comprehensive waterproofing Kerdi seems very well adhered to the Kerdi membrane. The first day used to apply Kerdi must be taken to protect cavities... Kgphoto Veteran Contributor Join Date: Jun 2004 Location: Los Angeles, CA Thanks Kevin easier to get level... Menards has Tec, but not sure they carry that pre-cut before installation that... Nearing completion of my tile shower project similar unmodified mortar when adhering the tiles to the thinset on OSB. Is to steel trowel the mud screed is level before they move to. Cure to achieve full strength, but achieves a lot of that in the shower industry! Vertically or horizontally on wood framing with the performance or adversely effect it to a... A bathtub needs to dry as well as cure to achieve full strength, but achieves a lot concerns... Cap off then tie in a new trap 70 % OSB subflooring panels where the panels are supported by o.c. May not be what you want because of height stackups showers, and the.! If the subfloor for tiling is made up of plywood, OSB and radiant heated floors -DITRA and DITRA-XL specifically... The Schluter-DITRA-HEAT system along with comprehensive waterproofing says FEATHER edge on the OSB floor cement!
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kerdi membrane over osb