vapor barrier: Meaning and Definition of

va'por bar"rier

Pronunciation: [key]
— Building Trades. 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.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.
vapor vaporescence
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