• synonyms

vapor barrier

See more synonyms for vapor barrier on Thesaurus.com
noun Building Trades.
  1. 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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Origin of vapor barrier

First recorded in 1940–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018