Moisture Barrier For Concrete Subfloor

Snap the chalk line over the top of the concrete or moisture barrier between the marks on opposite walls making a cross in the center of the room.

Moisture barrier for concrete subfloor.

The presenter is using 6 mil thick poly barrier. When rolling out the moisture barrier you want to go from wall to wall and cover the entire floor. You will lay the flooring lengthwise to this wall. For optimal moisture control you will want to overlap the poly barrier by at least six inches.

This video describes the process of installing a moisture barrier over a concrete subfloor. Check the moisture level of the subflooring using a moisture meter. Vapor barriers are a way to keep moisture from getting into the concrete. If you have a plywood subfloor over a concrete slab check the moisture level of both floors.

Determine your starting wall. How to install vapor barrier on concrete floor under laminate flooring. The concrete subfloor must be sufficiently strong to safely support the flooring furniture and people in the room. This is why a vapor barrier under concrete is essential.

A vapor barrier is not the same as an underlayment. The barrier comes in rolls about twenty four inches wide. Compare the results against the manufacturer s specifications for moisture limits. With your concrete subfloor you will need either a standard foam underlayment with a moisture barrier film or a 2in1 underlayment with moisture barrier already installed.

If you have a concrete floor that s in continuous contact with a source of moisture you re going to have problems. A 6 mil vapor barrier blocks all moisture from the subfloor from ever reaching your flooring.