You”ll be fine with thinset over Redguard on walls. It’s recommended for waterproofing niches, shelves, and entire shower walls when tar paper or poly are not used as a vapor barrier behind the CBU.

Keeping this in consideration, Do I need to use RedGard over Hardibacker?

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. As Vic mentioned, hardi isn’t waterproof, so no sense in being concerned with the seams. Hardi, while not waterproof will not be affected by water. Water will do it no harm.

Also know, What is waterproof drywall called? Greenboard is a term that’s occasionally used for a type of drywall that is used for walls in damp areas. Originally, greenboard was used as a direct backer board for ceramic tile in highly wet areas such as showers or bathtubs but this usage began to be phased out in the 1990s.


21 Related Questions Answers Found

 

How do I install AquaDefense?

Apply Mapelastic AquaDefense liquid 6″ (15 cm) on both sides of the cracks, control joints, corners and coves, using a paintbrush. Let dry to a dark green color. 2. Apply 2nd coat and let dry.

What is the purple sheetrock for?

Drywall. Drywall – also known as gypsum board or wallboard – is a naturally fire-resistant, paper-covered sheet of natural or synthetic gypsum used to build interior walls and ceilings in most homes. PURPLE® drywall is unique because it resists moisture, mold and mildew.

Can you use AquaDefense on drywall?

No. AquaDefense is not approved for showers constructed with drywall.

Can you use Mapei AquaDefense on plasterboard?

plasterboard (for internal applications only); existing coatings in ceramic, terrazzo and stone; cementitious render. Mapei Mapelastic AquaDefense is a totally solvent-free, ready-to-use,ultra-quick drying, one-component light blue synthetic resin based paste in water dispersion.

What is AquaDefense?

Mapelastic AquaDefense is a premixed, advanced liquid-rubber, extremely quick-drying waterproofing and crack-isolation membrane for installation under ceramic tile or stone in residential, commercial and industrial environments.

How soon can you tile after waterproofing?

24 hours

Is there such a thing as waterproof drywall?

It’s important to know that moisture-resistant drywall is not the same as waterproof drywall. Look into cement board if you need waterproof drywall. This type of waterproof drywall is designed for wet areas such as showers and bathtub surrounds.

What is RedGard used for?

Is Aquadefense paintable?

since you are not installing tile over it, it can be painted with a latex paint. Welcome, Katherine. Redgard is designed to be covered with tile or stone within 72 hours of installation. It is not meant to be left unprotected and latex paint is not gonna be considered a suitable protection.

How long should Thinset dry before waterproofing?

Allow the RedGard membrane to cure for 1 to 1 1/2 hours. The color will turn from pink to a solid red sheet with no pink spots when it is fully dry. It is most important that you wait for the color of the product to turn completely red as ambient conditions will make the dry time vary.

Do you need drywall behind cement board?

Because cement board can be used either for floors or walls, the surface below the cement board will vary: In such wet areas, never install cement board directly over drywall or green board. Instead, first, remove the existing surface material, then install the cement board over the studs and membrane, as applicable.

How do you waterproof a shower niche?

Step by step:
  1. Use fiberglass tape, not drywall mesh tape.
  2. Precut the pieces of tape to wrap the walls, corners, bottom and top, and any other seams.
  3. Apply membrane with a six-inch putty knife to the bottom of the niche, working the membrane into all the seams with the putty knife.

What is mapelastic AquaDefense?

Mapelastic AquaDefense is a premixed, advanced liquid-rubber, extremely quick-drying waterproofing and crack-isolation membrane for installation under ceramic tile or stone in residential, commercial and industrial environments.

What is mapelastic AquaDefense?

Mapelastic AquaDefense is a premixed, advanced liquid-rubber, extremely quick-drying waterproofing and crack-isolation membrane for installation under ceramic tile or stone in residential, commercial and industrial environments.

Can you use Mapei AquaDefense on plasterboard?

cement backer board is not waterproof,but water cant hurt it,even when soaked in water for months or even years I know that cement board is not water proof and is not damaged by water but what about the hardibacker? The hardibacker seems to be some kind of fiber board.

Can you use Mapei AquaDefense on plasterboard?

Yes, you can make drywall pretty much waterproof if you coat it on all sides and edges with water-based urethane before you install it. After it’s installed and finished, then coat it two more times.

Can I paint over AquaDefense?

Mapelastic AquaDefense can be applied with a paint brush or 3/8″ nap paint roller.

Can you tile over drywall in a shower?

The bottom line is that drywall (and this includes moisture resistant drywall) should never be used behind tile in wet areas (showers and tub-shower combinations). This is especially important in a shower located on an outside wall, but also helps even if the shower is on an inside wall.

Does 100% silicone stick to RedGard?

Caulk that gap with siliconized or latex caulk and then use Redgard over the caulk. Regard will not stick to 100% silicone caulk. You DO NOT want moisture collecting in that crevice and it can if you stuff it with thinset. Then after the tile is installed caulk that gap also.

How long does AquaDefense take to dry?

12 hours

Is durock waterproof?

I suppose you could roll drylok on drywall but it would texture the wall. A latex enamel should do a fine job of repelling moisture – it doesn’t matter a whole lot which sheen you use. I wouldn’t recommend using an exterior grade paint. They’re not formulated for interior work.

Will Thinset stick to AquaDefense?

Aquadefense is a great waterproofing product. Thinset mortar will adhere to it that’s what it’s specifically manufactured for. It requires the use of a polymer modified / latex modified thinset mortar. Check out the library shower construction thread to make sure that you built your shower correctly so far.

What is Red Guard waterproofing?

RedGard Waterproofing and Crack Prevention Membrane is a ready-to-use, liquid formula that creates a seamless waterproof barrier and prevents common cracks from occurring in tile, stone and grout. RedGard is easy to apply and dries quickly.

What is Red Guard waterproofing?

plasterboard (for internal applications only); existing coatings in ceramic, terrazzo and stone; cementitious render. Mapei Mapelastic AquaDefense is a totally solvent-free, ready-to-use,ultra-quick drying, one-component light blue synthetic resin based paste in water dispersion.

Do you have to seal drywall before painting?

After youre done hanging drywall, and all the seams are taped and finished, you need two coats of paint to give the wall its final appearance. Before you apply those, however, you need to seal the drywall and mud with primer. You may get acceptable results by using self-priming wall paint.

How do you seal drywall?

Wipe the drywall with a damp sponge to remove any dust left from sanding the joint compound smooth. Look for burrs, unfilled nail or screw head holes or crevices while you wipe. Sand burrs smooth or spread fresh compound to fill holes, smoothing with a drywall knife and sanding smooth when dry.

Does Thinset absorb water?

Cement board, backer board, thinset mortar, tile, grout and sealers aren’t waterproof. Some tile absorbs very little, while grout and natural stone are porous as a sponge.

Can you tile right over redguard?

You”ll be fine with thinset over Redguard on walls. It’s recommended for waterproofing niches, shelves, and entire shower walls when tar paper or poly are not used as a vapor barrier behind the CBU.

Can I use Drylok on drywall?

Wipe the drywall with a damp sponge to remove any dust left from sanding the joint compound smooth. Look for burrs, unfilled nail or screw head holes or crevices while you wipe. Sand burrs smooth or spread fresh compound to fill holes, smoothing with a drywall knife and sanding smooth when dry.

Does Thinset adhere to silicone?

Furthermore, thinset will not adhere to silicone.

How do you use Red Guard?

I suppose you could roll drylok on drywall but it would texture the wall. A latex enamel should do a fine job of repelling moisture – it doesn’t matter a whole lot which sheen you use. I wouldn’t recommend using an exterior grade paint. They’re not formulated for interior work.