Energy Glossary Definition (English)
Vapor Retarder Defined
The following is in context to Energy, because it's common for a single word to have multiple meanings you will find additional research links near the bottom of the page.
"A material that retards the movement of water vapor through a building element (walls, ceilings) and prevents insulation and structural wood from becoming damp and metals from corroding. Often applied to insulation batts or separately in the form of treated papers, plastic sheets, and metallic foils."
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Expert Dictionary: Vapor Retarder
