vapor barrier

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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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Origin of vapor barrier

First recorded in 1940–45

Words nearby vapor barrier

vape, vape pen, Vaphio, vapid, vapor, vapor barrier, vaporescence, vaporetto, vaporific, vaporimeter, vaporing

How to use vapor barrier in a sentence

The downside comes when that promise turns out to be false — if the buyer moves in only to find out that the roof needs replacing or the bathroom has no vapor barrier and mold is growing.
What you need to know before buying a flipped home|Haisten Willis|October 25, 2021|Washington Post
LNG terminals are typically designed with vapor barriers at the perimeters.
Engineers raise alarms over the risk of major explosions at LNG plants|Will Englund|June 3, 2021|Washington Post
I was out, maybe in the Great Barrier Reef catching black marlin.
The Story Behind Lee Marvin’s Liberty Valance Smile|Robert Ward|January 3, 2015|DAILY BEAST
Like other barrier-breakers before him, Colfer suffered his share of doubters.
Chris Colfer on Writing, Acting, and the Pain of Being A Pop Culture Trailblazer|Oliver Jones|December 15, 2014|DAILY BEAST

Language was no barrier; just about every tongue on the planet was babbling away, caught up in the elaborate mystique of a cult.
Sherlock Holmes Vs. Jack the Ripper|Clive Irving|November 16, 2014|DAILY BEAST
It was called, rather dramatically, breaking the sound barrier.
Virgin Galactic’s Flight Path to Disaster: A Clash of High Risk and Hyperbole|Clive Irving|November 1, 2014|DAILY BEAST
As a result, the vapor measurements Mahar obtained are likely the best-case scenario.
Oil Tankers Leaking into Seattle’s Water|Bill Conroy|October 13, 2014|DAILY BEAST
Should the vapor not condense well, the test-tube may be immersed in a glass of cold water.
A Manual of Clinical Diagnosis|James Campbell Todd
He was fired at by the sepoys, of course, but horse and man escaped untouched and the low barrier was leaped without effort.
The Red Year|Louis Tracy
But scorn is far more volcanic than glacial and a poor barrier between sex and judgment.
Ancestors|Gertrude Atherton
The barrier between them lowered perceptibly again, and Tom felt a momentary return of the confidence he had lost.
The Wave|Algernon Blackwood
The talk between them rarely touched reality, as though a barrier deadened their very voices.
The Wave|Algernon Blackwood