Do you need a vapor barrier with RedGard?
If you are using a topical waterproofing membrane such as a liquid like redgard or hydroban, or a sheet like kerdi, do not use a moisture or vapor barrier behind your substrate.
Can RedGard be used on shower walls?
Applying RedGard to any surface is super easy. If you can paint a wall you can use RedGard no problem. And for this shower, we only needed one gallon.
Can you tile over RedGard waterproofing?
If you want to tile over RedGard, you can use thinset mortar and tile directly on the shower wall. Mix mortar in small batches and apply it to the shower wall a small area at a time. Use a notch tile trowel to spread mortar whenever you tile over RedGard.
Do I need a vapor barrier behind cement board in shower?
If it’s a cement board, you need a vapor barrier, because cement retains moisture, which means the wood next to it is always damp.
Do you need to use RedGard over cement board?
Grout is porous, sealing it won’t protect you. Also, You need one vapor barrier either behind it or over it. Redguard would be an over it application.
Does redguard prevent mold?
Redgard helps with surface issues for sure but will not stop mold growth that is built into the board – meaning that it is not the surface getting moldy it is the whole board.
How do you waterproof a shower before tiling?
Youtube quote:First install a cement based pre slope. Always tie the liquid membrane into the drain by applying it to the bottom of the drain flange.
Does thinset stick to RedGard?
Premixed thinset mortar does not adhere well to RedGard waterproofing membrane. In order to make sure your tile bonds well to a surface that has been waterproofed with RedGard, use a powdered mortar. You will need to mix this mortar with water yourself, but it will ensure a strong bond between the tile and the wall.
Can redguard be used on drywall?
Youtube quote:And even though red guard says you cannot use it on a gypsum product because it's paper it's all it is as a paper backing. They don't recommend it for paper.
What goes behind cement board in shower?
Unless specifically manufactured as a waterproof product, cement board is water resistant but not waterproof. You must coat it with a fluid-applied waterproofing or apply a water-resistant barrier behind it that drains (BSC 2009b).
What do you do with a gap between tub and cement board?
Technically, after the tile is installed over the backer board that gap between it and the tub ledge should be filled with an ASTM C920 sealant (caulking e.g. silicone). Although some say you should have weep holes along this gap so any water behind can weep out into the tub.
What can I use for moisture barrier in shower?
Typically, the moisture barrier is 4-mil plastic or tar paper. The wall backing would either be mud walls, cement board, or fiber cement board.
Can I use any plastic for vapor barrier?
Plastic, specifically 6-mil polyethylene plastic, is the most commonly used vapor barrier. Plastic has a very low permeability rating, which means water, in its gaseous or liquid state, does not travel through it.
How do you install a shower vapor barrier?
Youtube quote:The top of the board to the stud to one place. Using a straight edge and your marker draw a line on the board to the top of the one liner. This will prevent you from screwing into the one.
How do you waterproof a durock shower?
Youtube quote:We're applying usg dirac brand liquid waterproofing and crack isolation membrane with a half inch nap roller. But it can also be brushed troweled or sprayed directly onto the substrate.
Should durock be waterproofed?
Should USG Durock® Brand Cement Board Panels be waterproofed in wet area use? Water does not affect USG Durock® Brand Cement Board, however, TCNA guidelines recommend the use of a waterproof membrane in wet areas.
How do you waterproof a membrane shower?
Youtube quote:Now what I want to do first is I want to wet the cement board so I'm going to take a sponge in some water and wipe the wall. Down. What's the water do the water will keep the adhesive from drying out.
How do you waterproof a shower with RedGard?
Youtube quote:First got quite a bit of it and then took a roller to the walls. And then this is a third coat. So that's all I'll do I'll let it stand overnight with the fan on it be nice and dry.
Do I need to seal cement board before tiling?
Although most backerboards currently available won’t fall apart when exposed to moisture and are somewhat water-resistant, they aren’t waterproof. To prevent moisture from seeping through to the wood or metal studs beneath the tile, a barrier or sealant must be used on porous materials.
What is the best thinset for shower walls?
Youtube quote:We like our decks x-77. For hanging large format tiles on a vertical surface. You can also use our decks x-77. On the floor. Now I will tell you this much this is a polymer modified thinset.
