Vapor Barrier On Slab Before Hardwood

Try cutting a 12 inch by 12 inch.

Vapor barrier on slab before hardwood.

Preventing the moisture from seeping up into the hardwood requires the installation of a vapor barrier also called a moisture barrier. We are talking about a glue down install of engineered wood over an on grade slab. If the vapor barrier gets damaged before the concrete pour it must be repaired. No need to bother with large fold out low quality off spec construction grade films which can be bothersome and hard to use before the floor is installed.

There are many types of vapor barriers including pvc. Our moistureblock is a 6 mil polyethylene film vapor barrier that is used during the installation process with floating laminate luxury vinyl planks and engineered wood floors. Concrete tends to wick water quickly and the barrier holds back most of the moisture. Should a vapor barrier always be used in this scenario.

Underlayment with 6 mil vapor barrier. A concrete vapor barrier is any material that prevents moisture from entering a concrete slab. Cut another piece of vapor barrier material large enough to cover the damaged area by a minimum of 6 inches on all sides. Vapor barriers are used because while fresh concrete is poured wet it s not supposed to stay that way.

The other two says it depends on our area of the valley and our slab. Completely tape to pipe and vapor barrier. It needs to dry and then stay dry to avoid flooring problems.