vapor barrier

noun

Definition of vapor barrier

: a layer of material (such as roofing paper or polyethylene film) used to retard 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

An unbroken envelope of insulation and vapor barriers from its bottom floor to the top keeps the building air tight. Christopher Mims, WSJ, "Why Your Next Home Might Not Need Any Energy at All," 22 Dec. 2018 The exterior walls are reparged and a vapor barrier added. Kevin Brasler, Philly.com, "Solve a wet basement by fixing the problem, not managing it," 1 May 2018 The green material on the east side and other parts of the arena is an air and vapor barrier, said Mortenson spokeswoman Bridget Kraus. James B. Nelson, Milwaukee Journal Sentinel, "Milwaukee Bucks arena is 80% done - and that weird green color won't be visible for long," 30 Jan. 2018 There are sections of the main entrance area - such as a band above the glass about half way up - where the green vapor barrier is already covered by the final finish materials. James B. Nelson, Milwaukee Journal Sentinel, "Milwaukee Bucks arena is 80% done - and that weird green color won't be visible for long," 30 Jan. 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'vapor barrier.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of vapor barrier

circa 1941, in the meaning defined above

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Time Traveler for vapor barrier

The first known use of vapor barrier was circa 1941

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