Can you tile directly on RedGard?

For tile installations bonding directly to the substrate; strongly recommended to apply at least one full coat of “undiluted” RedGard® to the “dry” primed area and allow to dry completely before tile installation work is to begin.

Does thinset adhere to Redgard?

From what I have read, the premixed thinset does not dry out to form a good adhesive bond when applied over/under a non-permeable membrane like Redguard or the Kerdi-band products. The dry mix (where you add the water on-site) does.

Can you put Redgard on Hardibacker board?

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.

How do you waterproof a membrane?


  1. 1Clean the floor. Before you start waterproofing it’s important that the floor is clean.
  2. 2Apply the primer.
  3. 3Silicone the gaps.
  4. 4Apply masking tape to the wall.
  5. 5Apply the waterproofing agent.
  6. 6Apply the waterproof membrane to joints.
  7. 7Waterproof the whole floor.
  8. 8Apply the last coat of waterproofing agent.

Does Thinset adhere to Redgard?

Can you paint over waterproofing membrane?

Painting your waterproof membrane may not be warrantied, but it is possible. Remember that you will have to use a good quality primer or an all-in-one paint for the best chance at success with your fresh coat of paint.

Can you use cement board in a shower?

Cement boards can be used in a shower because they can be exposed to water and moisture without warping, rotting, and deteriorating. Although cement boards can generally be used in any wet areas such as showers and bathrooms, there are other things that you should be considered as well which will be discussed below.

Will thinset adhere to Redgard?

Do I need to use Redgard over Hardibacker?

You really don’t need the RedGard, but the more protection the better…so go for it. And yes, you can do the boards beforehand. But, hit the filled seams & screws (your weak points) as soon as a panel is ready to give it some time to setup.