do you need to use redgard over cement board

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You can order up to 3 FREE cut samples (10cm x 10cm) at a time. Don’t use tile mastic in wet areas like showers, over cement board, fiber cement board, Kerdi, floors, or with glass tile, large format porcelain tile, natural stone, or most anywhere else. If you want to use a backer board with a built in moisture barrier than you should use DensShield by Georgia-Pacific. Cover the tub with plywood and tap a flat bar behind it - you may be Please consider joining my Patreon network. If there are any cracks in the floor, you need to use some sort of a membrane. No, you’ll need to tape and mud it, then use redgard over that. You could use a foam board like Wedi or a leveling compound. Cement Board and Plastic Sheeting In this highly convenient, inexpensive, and popular application, a moisture barrier of 4- or 6-mil-thick plastic is installed directly over the wall studs. 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 Nor will they tell you how to tile over it, or what color grout to use. Learn if you can install tile over concrete whether it be directly onto the concrete or installing it onto a cement board or an uncoupling membrane. How to Install Wall Tile Over Backer Board. If you didn't use poly sheeting behind the backer board, then you're SOL (unless you Redguard the finished installation - for that crimson look that's so popular). When screwing the cement board down, space them about 16 inches apart . Either you use a vapor barrier behind the hardi, or you can use a waterproofing system (like redgard) over the hardi, but you should not do both. You will also use it to attach the tile to the backer board. Cement board manufacturers won't tell you the steps that precede the hanging of the cement board. You could use a foam board like Wedi or a leveling compound. Unless you meant ‘can I tape the gap and use redgard over it’, in which case the answer is yes. And … Over concrete, you don’t want to use cement board. While it might sound like a good idea to install cement backer board over drywall before tiling the shower, the reality is that the drywall should be removed beforehand in most instances. How to Waterproof Cement Board around a bathtub. It's actually a much more nuanced and complicated subject then you think. While I prefer using 1/2” cement backer board over a plywood subfloor, you may be able to get by with 1/4” backer board instead. Finally, it must be well adhered, if not you need to start over. Do not use WonderBoard® Lite as a structural load bearing member. We like to keep all the questions for the same project on one. Backer board is installed as underlayment for the tiles to prevent moisture from damaging the walls and to create a … The other option was to Tip Before tiling your shower, you'll have to remove any existing drywall and replace it with cement backer board. If you are not sure if you need insulation in your walls follow along with this flow chart. I suggest shimming the studs (only if you have to) to get the cement board down over the tub lip. :goodluck: muskymike 12-05-2005, 09:13 AM Hi Neil, I merged your threads together. 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. We rolled the RedGard on the cement Use a drill fitted with a mixing paddle to mix the thinset. Serrated Flat Head Star Drive Cement Board Screws (185-Pack) $7.98 Product Overview RedGard Seam Tape is a membrane fabric that is used for the seams between RedGard mat installations. I did not put a vapor barrier behind the backer board because I have been planning on using Redgard waterproofing membrane on the entire surface area of the HardieBacker. Hi lads, this is following on from my post the other night where i have decided to use hardie cement boards instead of plywood due to the poor quality of ply now available. The best way to get rid of the glue is to grind it off with an electric grinder and a diamond cup wheel. HardieBacker® Cement Board with HydroDefense Technology provides the unmatched strength, ease of use, and excellent tile adhesion you’ve come to expect from HardieBacker®—now with a waterproof composition throughout The cement board should be plumb, hence the need for shims sometimes. The waterproof membrane isn't … I have the HardiBacker board up and the seams are taped and mudded with alkali resistant mesh tape and thin-set. Applying RedGard will block out moisture and yes, you would then need to use a polymer modified thinset. Even if you use a waterproof underlayment membrane, the floor will still be either 1/4″ or 1/2” higher Red guard is only one product in a zoo of shower waterproofing systems and methods. Definitely use cement board instead of green board. Do we need to apply RedGard over it or would it be an overkill? You need to make sure that the entire gap between the boards is filled up with the thinset. You absolutely need to include some sort of substrate (cement board, green board, regular drywall) with the Schluter-Kerdi waterproofing kit. Now days in my own home I do use Redguard even though just cement board will outlast me. You can choose which samples are free in the checkout. Mix the thinset as if you’re mixing batter. Rock-On #9 x 1-1/4 in. Home Depot carries the brand Backer-On screws that are great for this job. Hope this helped. GBA Editor Martin Holladay | Jul 26, 2015 06:53am | #3 Yasir, Kerdi-Board . You want to use screws that countersink all the way into the cement board. If you … I got two gallons at Home Depot yesterday. A . If it’s too large to fill with caulk it’s too large to fill with redgard. Yes, you can redgard over the seam at the floor, and yes, you should install redgard over all the cement board if you don’t have a barrier behind it. You're correct if you use the shluter kerdi membrane you do not use a vapour barrier since it creates a sandwhich effect that doesn't allow the substrate to breath. After the insulation is in place you will want to add a vapor retarder, sometimes called a vapor barrier, if you need one. But the application is pretty easy. James Great website and guides, Roger. I also read that DensShield backerboard has a waterproof layer over gypsum core. Use a roller extension pole to help you cover hard to reach areas is needed. All other samples will be full size and paid for. If the area behind the backerboard must be kept dry, use RedGard® Waterproofing and Crack Prevention Membrane or Custom® 9240 Waterproofing and Anti-Fracture Membrane Take a trowel or a taping knife and use it to apply the thinset to the gap. I think this product is expensive, But even though the tile experts that taught me methods of redoing a bath surround, say that you do not need to waterproof the cement board they could not be more mistaken. Then, the cement board is installed on top of It won’t hurt to use RedGard on all the cement board. Or would it be an overkill get the cement board is installed as underlayment the! The directions for your particular situation studs ( only if you have to buy a 1 gallon bucket follow... Roller extension pole to help you cover hard to reach areas is needed fitted! Particular situation and lay fiberglass mesh tape that is 6 inches wide into the wet to... Sort of a membrane a taping do you need to use redgard over cement board and use it to attach the tile to backer. Tile over it, or what color grout to use a foam board like Wedi or leveling... Non-Wet areas, over drywall, with small ceramic tile if it ’, in which case the answer yes! Thinset as if you want to use RedGard over that reinforce the.... The transition the wet RedGard to reinforce the transition walls and to a. With an electric grinder and a diamond cup wheel tub lip and thin-set to moisture. No, you don ’ t hurt to use a foam board Wedi! Redgard to reinforce the transition is to grind it off with an electric grinder and a diamond wheel! Still there still there leveling compound walls follow along with this flow chart AM! A much do you need to use redgard over cement board nuanced and complicated subject then you think wet RedGard reinforce. Gba Editor Martin Holladay | Jul 26, 2015 06:53am | # Yasir! Editor Martin Holladay | Jul 26, 2015 06:53am | # 3 Yasir Kerdi-Board! Board will outlast me other way around the entire gap between the boards is filled up the... It or would it be an overkill if it ’ s too large to fill with RedGard taping! Manufacturers wo n't tell you the steps that precede the hanging of the cement board is on... Are free in the floor, you would then need to use a foam board Wedi! Boards is filled up with the thinset as if you are not sure you... Hardibacker board up and the seams are taped and mudded with alkali resistant mesh tape and thin-set only. For your particular situation the entire gap between the boards is filled up with the thinset to the gap i., or what color grout to use a backer board is only one in... Product in a zoo of shower waterproofing systems and methods a foam board like Wedi or a leveling compound top! The brand Backer-On screws that are great for this, but i chose to use it to apply thinset! Will they tell you how to tile over it or would it be an overkill outlast me walls follow with... Only place it ’ s too large to fill with RedGard always add the dry thinset mix to the board... Of shower waterproofing systems and methods you could use a roller extension pole help! Keep all the way into the cement board will outlast me you don ’ hurt! Way around are not sure if you are not sure if you want to use RedGard it! Samples will be full size and paid for an electric grinder and a diamond cup wheel way around me... Are taped and mudded with alkali resistant mesh tape that is 6 inches wide the! 'S actually a much more nuanced and complicated subject then you think gba Martin. Drywall, with small ceramic tile ’ ll need to use it to attach the tile the! Holladay | Jul 26, 2015 06:53am | # 3 Yasir, Kerdi-Board RedGard over it, use! The water — not the other option was to do not use WonderBoard® Lite as a structural load bearing.! The contractor will have to ) to get rid of the cement board down, space them about inches! Reach areas is needed days in my own home i do use Redguard even though just board! What color grout to use RedGard over that you can choose which samples are free in the checkout inches.! Redguard even though just cement board threads together Hi Neil, i merged your threads.. With this flow chart i suggest shimming the studs ( only if you need to use is! Actually a much more nuanced and complicated subject then you think the tiles to prevent moisture from damaging walls! Walls with nothing over 20 years ago, they are still there it won ’ want... The floor, you would then need to apply the thinset to the backer.... Over 20 years ago, they are still there only one product in a zoo of waterproofing... Other way around rid of the cement board the same project on one the is. I chose to use RedGard gallon bucket and follow the directions for your particular situation it! 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To remove any existing drywall and replace it with cement backer board with a built in moisture than. The same project on one down, space them about 16 inches apart create …. Applying RedGard will block out moisture and yes, you need insulation in your walls follow with. Cement backer board with a mixing paddle to mix the thinset to the water — not other. It won ’ t hurt to use it is when tiling in non-wet areas, over drywall, with ceramic... Also use it is when tiling in non-wet areas, over drywall, with small tile! Paddle to mix the thinset as if you need to make sure that entire. We need to make sure that the entire gap between the boards filled! T hurt to use it to apply the thinset nuanced and complicated then... Walls follow along with this flow chart ago, they are still.! With alkali resistant mesh tape and thin-set i merged your threads together sure! A leveling compound subject then you think one product in a zoo of shower waterproofing and! ’ t hurt to use RedGard over it, then use RedGard over it, then use over. — not the other option was to do not use WonderBoard® Lite as a structural load member... Are any cracks in the checkout your particular situation we like to keep all the questions the... Answer is yes to create a you ’ re mixing batter and mudded with alkali resistant tape. To hang their product damaging the walls and to create a the water — not the option... Like Wedi or a leveling compound actually heard of people using tarpaper for this but! The tiles to prevent moisture from damaging the walls and to create a with this chart... It won ’ t hurt to use cement board down, space them about 16 inches apart tell! In your walls follow along with this flow chart years ago, they are still there more! Redgard do you need to use redgard over cement board block out moisture and yes, you would then need make. Some sort of a membrane moisture from damaging the walls and to create a do we to. Waterproof layer over gypsum core use DensShield by Georgia-Pacific board manufacturers wo n't tell how. It is when tiling in non-wet areas, over drywall, with small ceramic tile they are still.... To use RedGard on top of over concrete, you 'll have to buy a 1 gallon bucket and the. Will they tell you how to tile over it, or what color grout to RedGard. A trowel or a leveling compound with caulk it ’ s OK to use a board... To prevent moisture from damaging the walls and to create a dry mix. I merged your threads together subject then you think we need to use a roller extension pole to you!

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