Should you put a vapor barrier under vinyl plank flooring?

Vinyl floors under 4mm should be installed right over the subfloor. If you have any areas on a concrete subfloor with moisture concerns, it is recommended to use a vapor barrier underlayment that will not add any cushion to the planks.

How do you install moisture barrier underlayment?





How to Install a Vapor Barrier on a Concrete Floor

  1. Select the Vapor Barrier. …
  2. Clean Floor and Perimeter Walls. …
  3. Apply Butyl Tape to Walls. …
  4. Unroll and Trim Vapor Barrier Sheets. …
  5. Apply Vapor Barrier Seam Tape. …
  6. Fasten Vapor Barrier to Wall.


What underlayment to use for vinyl planks?

Rigid Underlayment



Plywood is often the most commonly used type of underlayment in vinyl plank flooring installation. Sheets of 4×8 foot plywood, usually ¼ to ½ inch thick tend to be an excellent flooring underlayment for many subfloors including wood, tile, and linoleum.

How do you install a vapor barrier on a floor?

Quote from the video:
Quote from Youtube video: Side we're going to go ahead lay this out make sure it's right where we want it and then fold it back peel our tape off. And seal it to this plastic strip that they have coming from this other piece.

Where should vapor barrier be installed?





Vapor barriers are usually best installed on the side of the wall that experiences the hotter temperature and moister conditions: the inner surface in colder climates and the outer surface in hot, humid climates. In existing spaces, oil-based paints or vapor-barrier latex paints offer an effective moisture barrier.

Do I need a vapor barrier and underlayment?

Very often, particularly in a below-grade installation on a concrete basement floor, a vapor barrier is recommended in addition to the underlayment. That vapor barrier would go between the subfloor and the underlayment.

Do you need a moisture barrier under vinyl plank flooring on concrete?

Moist Concrete



When installing certain types of flooring — such as sheet vinyl — the moisture content of the concrete can be a problem. Without the proper moisture barrier, vinyl flooring acts as a moisture barrier, causing it to buckle, bubble and lift.