vapor barrier
noun
plural vapor barriers
: a layer of material (such as roofing paper or polyethylene film) used to slow or prevent the absorption of moisture into a construction (such as a wall or floor)
Examples of vapor barrier in a Sentence
Recent Examples on the Web
Most crawl spaces need a dehumidifier and vapor barriers installed to keep humidity to a minimum before they are closed up.
—
Brandee Gruener, Southern Living, 16 Jan. 2026
The insulation may be the wrong size for the wall cavity, or the vapor barrier might be improperly stapled to the studs—or detached.
—Lee Wallender, The Spruce, 16 Jan. 2026
Giant white turnips resemble rutabaga and are often wax-coated after harvest to create a vapor barrier that seals in moisture and prolongs shelf life.
—Christopher Bergland, Verywell Health, 20 Oct. 2025
Part of the facade construction includes creating a yellow-colored air and vapor barrier to make the building waterproof.
—Sydney Franklin, The Enquirer, 29 July 2025
The vapor barrier below the house, which helps prevent moisture buildup and mold, was cut up, and there were no air vents to allow circulation.
—Nick Rosenberger, Idaho Statesman, 13 Jan. 2025
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Brandee Gruener, Southern Living, 16 Jan. 2026
The insulation may be the wrong size for the wall cavity, or the vapor barrier might be improperly stapled to the studs—or detached.
—Lee Wallender, The Spruce, 16 Jan. 2026
Giant white turnips resemble rutabaga and are often wax-coated after harvest to create a vapor barrier that seals in moisture and prolongs shelf life.
—Christopher Bergland, Verywell Health, 20 Oct. 2025
Part of the facade construction includes creating a yellow-colored air and vapor barrier to make the building waterproof.
—Sydney Franklin, The Enquirer, 29 July 2025
The vapor barrier below the house, which helps prevent moisture buildup and mold, was cut up, and there were no air vents to allow circulation.
—Nick Rosenberger, Idaho Statesman, 13 Jan. 2025
Cite this Entry
“Vapor barrier.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/vapor%20barrier. Accessed 1 Feb. 2026.
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