We have 16â³ floor joist with a 3/8â³ plywood, a layer of tar paper, then 3/4â³ tongue and groove Drymax. I also read that DensShield backerboard has a waterproof layer over gypsum core. RedGard Waterproofing and Crack Prevention Membrane is dry when it turns solid red, with no visible pink color. Learn about the RedGard Uncoupling Mat for crack prevention in tile and stone. Tiling over plywood is a big no-no. Answer Save. When RedGard is wet, it is a hot, fluorescent pink color. Backerboard does not shrink or expand when it comes into ⦠If your ProFlex thinset bag says it meets ANSI standard A118.4 or A118.11 (read the fine print) it sould be fine over the RedGard, too. RedGard waterproofing membrane is an easy-to-install solution to prevent water leaks through horizontal and vertical installations. The good news is I've discovered the problem before placing tile. The only thing that really bothers me about this picture is that the top piece of plywood seems precarious to me. Like this. Subsequently, question is, can RedGard be used on concrete? Drains should have a clamping ring with open weep holes for thin-set application. Non scientific testimonial #1 = the tabel of my MK 101 has a coat of redgard on it that has been there over 2 years with no re-emulsifying or bleeding. For further assistance please contact us at 1 800 282 8786 option 2. Plus, composite decking over the membrane? You can apply RedGard to concrete , cement backerboard, exterior grade plywood and exterior decks. Subfloor holds up all of the above layers of flooring, as well as everything in your houseâpeople, dogs, cats, pianos, furniture. If the line between the plywood sheets bothers you, wood putty it, then sand it down. These membranes consist of products such as Custom Building Productsâ Redgard and Laticreteâs Hydrobarrier and Hydroban and Mapeiâs Aquadefense. Thus I would suggest removing the current wood planks flooring, install a 3/4" outdoor grade plywood, thinset and then your HardieBacker (screwed down). Thereâs also Stratamat, Flexbone, and others that allow for modified mortars. Drying time depends mostly on temperature & humidity levels and the surface will appear pink until the the RedGard has completely dried. For further assistance please contact our technical services department at 1 800 282 8786 option 2. From what I read in the posts on backerboards in GBA I see several comments on how well RedGard membrane is performing for the shower and tub areas. It also functions as a ⦠Use either VersaBond or FlexBond (both made by CBP) from Home Despot and you will be fine. Have a 5/8â³ plywood subfloor glued and screwed over 3/4â³ OSB sub-subfloor on floor trusses in a new bathroom. Then lay the click lock style floating LVT on the OSB. When the RedGard appeared red and wasnât tacky we applied a second coat horizontal to the first. Can I use redgard on the plywood before I install the bamboo flooring? edit: Spiderweb is now Redgard Uncoupling Mat and, as a result, comes in a new snazzy red color! Gaps between plywood sheets and where floors meet walls must also be prefilled. Typically made of plywood or OSB and ranging in thickness from 19/32" to 1 1/8" thick, the subfloor is truly structural, second only to joists in this respect. This waterproof and crack prevention membrane is best for all interior or ⦠Two sheets of plywood (have them cut to size by store), a jigsaw, sander, paint, wood putty, screw gun and screws are all you would need. I will refer to all the membranes as Plywood is one of the most commonly used construction materials in the residential and commercial areas. Does this seem like the best way to do this and apply the Redgard as a topside waterproof layer?  Share. Typically, drying time is 1-1.5 hours; depending on ambient conditions, drying time can be as much as 12 hours. On a plywood subfloor, you need either a layer of cement backer board or an underlayment membrane, like Custom Building Productsâ Wonderboard and RedGard, between the subfloor and tile for the thin-set adhesive to achieve a good bond. Five years later all is just fine. Custom Building Products offer quality surface preparation solutions for any tile or stone installation. 1 decade ago. Take from someone that did it and regret it. Curing of Product RedGard® is dry when it turns solid red, with no visible pink color. Quick question, I'm a DIYer and installing a LVT floor in a bathroom. Redgard is a liquid waterproofing and crack-prevention material that dries to a flexible membrane. A ready-to-use elastomeric waterproofing membrane for both commercial and residential tile and stone application. This took about 1 to 1.5 hours. We show 5 sheets of a relatively cheap grade plywood (siding grade â designed to clad houses) here. But I m not sure as to why you d need to do this. If you have been planning to paint over Redgard waterproofing, here are a few of the things that you need to know. Premium quality waterproofing & crack prevention membrane brought to you by Redgard. Plywood manufactured with a fully waterproof adhesive and with an exposure durability rating of Exposure 1 or Exterior may be used on interior, residential, horizontal surfaces when installed ... waterproofing agent Cuâs RedGard will protect the OSB STOM from moisture in the thin set mortar and subsequent surface exposure. RedGard can go over interior plywood, but I don't believe they recommend it over plywood for exterior installations. How are you going to secure it? Favourite answer. Marine plywood is a type of wood specifically formulated for use in moist or wet areas. Plywood is available in a variety of different qualities. RedGard on Plywood was enough but I added some (Garage Floor) epoxy to be pretty. 2 Answers. ⦠both liberally covered with Redgard, and used on the saw frequently. First, you will need to plan on painting with a primer. add a comment | 0. Apply the RedGard SpeedCoat membrane to the bottom of the flange. For interior and exterior use, Redgard may be applied to surfaces such as concrete, exterior-grade plywood, decks and gypsum-based materials. Non scientific testimonial #2 = I have a couple of bevel jigs made out of plywood, a 45degree and a 22 1/2degree. Using RedGard under floor and wall tile will create a barrier that will be undisturbed after the tile is installed and grouted. , which is designed for exterior use to sheathe the outside of a house. Elastomeric or liquid waterproofing membranes are one of the most convenient methods of waterproofing shower walls before installing tile. It is used on concrete backer boards, exterior grade plywood, exterior decks, and gypsum drywall. You don't want holes in your membrane. Suited for interior and exterior substrates, RedGard creates a continuous waterproof membrane barrier with outstanding adhesion and reduces crack transmission in tile and stone floors. So if you want to build, for example, a Redgard shower the cure times start to add up: 1 day to build a mud shower pan; 3 days wait for it to cure; 1 day to Redgard the shower and wait for it to dry completely; 1 day for a second coat and dry time, 1-3 days to flood test the shower pan. RedGard SpeedCoat at Drains. Improve this answer. Attached Thumbnails 01-26-2016, 12:45 PM AV656 : 2 posts, read 26,567 times Reputation: 16. Lightweight or gypsum-based materials must obtain a minimum of 2000 psi (13.8 MPa) compressive strength at the recommended cure time. What it is is that Dricore uses a membrane like DeltaMS to allow moisture to move away, and barricade uses XPS foam for insulation. 12k 1 1 gold badge 19 19 silver badges 49 49 bronze badges. Yes, 3/4 inch plywood (not particle board, MDX, or whatever) is a standard subfloor in quality construction. Do we need to apply RedGard over it or would it be an overkill? However, usually the materials in the wood are not enough to block all moisture from the wood. For continuous crack isolation, cover the entire substrate with RedGard applied to a minimum 30 mils wet film thickness. They recommend that you attempt to prime the walls first and then apply a second layer of paint. The RedGard was supposed to be compatible with cement board, but the manufacturers instructions did not specifically mention HardiBacker, so I called both Custom Building Products and Hardie, and they both said 'should be OK' without too much confidence. Let this first coat of RedGard dry until the panels appear red in color. The drain should be fully supported, without movement, and should be even with the plane of the substrate. Are you going to float sleepers over the RedGard and fasten the composite to the sleepers? the crack. We stood the plywood in Smiths Clear Penetrating Epoxy Sealer dyed blue. I have my Advantec subfloor and was going to drop a 1/4" OSB over that and then put the Redgard on the OSB. The safest, most prudent course is to install tile on top of a cement backerboard such as Durock, Wonderboard, or HardieBacker. Follow answered Aug 13 '13 at 22:50. wallyk wallyk. The installation manual for HardieBacker suggests to embed it in thin-set and it should be installed over plywood. Cement backerboard is made for tiling. We chose DensShield for its better environmental attributes. Update: Schluter just recently came out with their own line of Schluter branded thinset mortars.They have both modified and unmodified and approve their use with Ditra. rob s. Lv 7. The ply is to adjust height to match hall flooring level. This plywood is formulated to resist water and moisture on its own. RedGard as General Waterproof Membrane (ANSI 118.10) Cracks to ⦠I read over the Schluter PDF where it had the strengths of various types of tile listed as well as a lot of other data regarding the product. After the second coat is applied and both coats are fully cured, the application area can be flood tested. RedGard Waterproofing and Crack Prevention Membrane is only suitable for use on Exterior Grade plywood in interior dry areas. Ditra works like a dovetail joint. Relevance. How to Protect Plywood From Water Damage. Redgard can be used as an antifracture membrane over a properly prepared plywood subfloor. There are 2'x4'panels that are made from cement and can be screwed on the plywood and then you can tile on top of that. Typically, drying time is 1-1.5 hours; depending on ambient conditions, drying time can be as much as 12 hours. Red Guard is excellent for tiling. RedGard was develolped by Custom Building Products, a thinset manufacturer, specifically for use under modified thinset. One caution,they are very heavy,so make sure that the joists under the plywood are strong enough to support the wheigh. Plywood Substrate Alternatives .
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