Do I need a vapor barrier behind Kerdi?
Do I need a vapor barrier behind Kerdi?
Kerdi is the vapor barrier, there is no need for anything behind it. Kerdi can even be installed over drywall. Cement board and grout are not water proof, if there’s Kerdi no moisture is ever going to be able to get behind it.
Does a bathroom need a vapor barrier?
Because of moisture, bathrooms are some of the primary areas of your home at risk of mold and mildew development. You don’t need to put a vapor barrier in the ceiling of the bathroom.
What do you put behind a fiberglass shower?
Use an appropriate waterproof or moisture-resistant backing material behind grouted tile or stone or segmented plastic or fiberglass tub and shower surrounds. Appropriate materials include cement board which has a cementitious core and glass mats on both sides to strengthen the board.
What should I use as a vapor barrier in my shower?
Greenboard. If you’re using greenboard or drywall for the walls of the shower, you’ll need to put the vapor barrier between the greenboard and the water. Failure to do that will mean that moisture will soak the greenboard and it will gradually crumble, as will your shower wall. A good vapor barrier would be 6-milliliter polyethylene.
What kind of barrier should I put around my shower wall?
Use a polyethylene plastic which is specifically designed for residential installations of vapor barriers on walls. Be careful when installing the barrier because its improper use might cause additional moisture problems. Placing a vapor barrier around the shower wall will ensure a long-lasting installation, but only if installed properly.
Can you use drywall over a vapor barrier?
Do not use drywall or greenboard over the vapor barrier. These materials will not withstand the moisture trapped by the barrier. The cement board breathes and will allow moisture to pass through to the vapor barrier and then evaporate back out through the cement.
When to use a type 2 vapor barrier?
A Type 2 vapor barrier is used where there’s no expectation of high humidity. Given that moisture will continue to penetrate any material until it’s stopped by a barrier, it’s extremely important to have the vapor barrier on the warm side of any wall. In an outside wall, for example, it will stop the moisture from penetrating the insulation.
Greenboard. If you’re using greenboard or drywall for the walls of the shower, you’ll need to put the vapor barrier between the greenboard and the water. Failure to do that will mean that moisture will soak the greenboard and it will gradually crumble, as will your shower wall. A good vapor barrier would be 6-milliliter polyethylene.
Use a polyethylene plastic which is specifically designed for residential installations of vapor barriers on walls. Be careful when installing the barrier because its improper use might cause additional moisture problems. Placing a vapor barrier around the shower wall will ensure a long-lasting installation, but only if installed properly.
Do not use drywall or greenboard over the vapor barrier. These materials will not withstand the moisture trapped by the barrier. The cement board breathes and will allow moisture to pass through to the vapor barrier and then evaporate back out through the cement.
A Type 2 vapor barrier is used where there’s no expectation of high humidity. Given that moisture will continue to penetrate any material until it’s stopped by a barrier, it’s extremely important to have the vapor barrier on the warm side of any wall. In an outside wall, for example, it will stop the moisture from penetrating the insulation.