Will a Vapor Barrier Reduce Humidity

A vapor barrier blocking evaporation of ground moisture will lower the relative humidity in the crawl space and hopefully the mustiness you complain of.

Do you need a dehumidifier with vapor barrier?

A vapor barrier installation is the process of laying down 6mm black plastic throughout your entire crawl space floor. The vents to your crawl space are not sealed, therefore you are not required to have a dehumidifier installed. A vapor barrier installation does not require a sump pump to be installed either.

How do I lower the humidity in my crawl space?

  1. Make Sure Your Foundation Is Insulated. Basement waterproofing should be the first step to take if you want to keep your crawl space moisture-free. …
  2. Get a Dehumidifier. …
  3. Drain Your Crawl Space Better. …
  4. Cover the Floor of Your Crawl Space. …
  5. Use A Fan.
James H. Sterling

James H. Sterling

Environmental Science & Climate Journalist

James Sterling reports on renewable energy developments, climate policy, ecological conservation, and green tech innovations around the globe.

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