vapor barrier
noun Building Trades.
a layer of material, as plastic film or foil, used to protect installed insulation by retarding the transmission of moisture from the interior environment.
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Nearby words
vape pen, vaphio, vapid, vapidly, vapor, vapor barrier, vapor lock, vapor pressure, vapor tension, vapor trail, vaporescence
Origin of vapor barrier
First recorded in 1940–45
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019