Vapor Barrier Under Carpet Over Crawl Space

A 6 mil polyethylene vapor barrier is placed over any ground floor.

Vapor barrier under carpet over crawl space.

How to install hardwood flooring over a crawlspace without underlayment. It is best to begin with a crawl space that is as dry as possible. But what was done was that a vapor barrier was stapled to the bottom of the subfloor apparently prior to putting down the subfloor since. If the crawl space is ventilated which is ideal because it aids in the elimination of moisture then fiberglass insulation can be easily installed under the subfloor between the floor joists.

A crawl space must also have proper cross ventilation and no dead air spaces. Vapor barrier on ground floor of crawlspace the most common and correct method for installing a vapor barrier in a crawlspace. Facing up towards the floor above or facing down towards the crawl space or basement floor. Without the appropriate vapor barrier and cross ventilation crawl space moisture will attack the underside of a subfloor and enter into the laminate flooring core.

Because excessive dampness in a crawlspace or basement can condense you can install a vapor barrier to protect floor framing from becoming damp and covered with fungus efflorescence and rot. The seams are typically overlapped 6 12 and almost never taped. When we insulate the walls of the crawl space we lay down plastic over the dirt. The ground floor could be river rock pea gravel dirt floor sand etc.

It is important to secure insulation and cover it with a vapor barrier in order to prevent moisture and the mold that often follows close behind. A crawl spaces must have a proper vapor retarder ground cover spread over the soil. Moisture can damage a hardwood floor irreversibly so every installation should include effective safeguards against it. Which way does the insulation vapor barrier or kraft paper go over a basement or crawl space.

One of those steps is a crawl space vapor barrier especially if you have a dirt floor. A vapor barrier consists of one or more layers of sheet plastic 6 mil visqueen on top of the soil in the crawlspace or basement. You may need several days of effort to dry out the crawlspace before you venture down to lay vapor barriers over the ground. Retrofoam of michigan has been insulating crawl spaces with foam insulation for more than 15 years.

This article discusses the proper location and placement of moisture barriers or vapor barriers in crawl spaces to crawl space moisture. Your crawl space is a dark dank space that can be a breeding ground for mold and mildew if the proper steps aren t taken.