BSD-106: Understanding Vapor Barriers | buildingscience.com
2011年4月15日 · The function of a vapor barrier is to retard the migration of water vapor. Where it is located in an assembly and its permeability is a function of climate, the characteristics of the materials that comprise the assembly and the interior conditions. Vapor barriers are not typically intended to retard the migration of air.
Vapor barrier - Wikipedia
A vapor barrier (or vapour barrier) is any material used for damp proofing, typically a plastic or foil sheet, that resists diffusion of moisture through the wall, floor, ceiling, or roof assemblies of buildings and of packaging to prevent interstitial condensation.
Understanding Moisture Barriers - This Old House
2024年8月28日 · Moisture barriers are a key part of home construction. A moisture barrier, also called a vapor barrier or vapor retarder, is a material that stops water and moisture from passing through walls, floors, and other parts of a building.
Vapor Barriers or Vapor Retarders | Department of Energy
In most U.S. climates, vapor barriers, or -- more accurately -- vapor diffusion retarders (vapor retarders), should be part of a moisture control strategy for a home. A vapor retarder is a material that reduces the rate at which water vapor can move through a material.
The Ultimate Vapor Barrier Guide (Your Top 10 FAQs Answered)
2022年10月23日 · Before installing one in your house, there is a lot to know about vapor barriers, so read on for answers to all your critical FAQs in this ultimate guide. When Should a Vapor Barrier Be Installed? Does Mold Grow Under Crawl Space Vapor Barriers? Should a House Crawl Space Be Vented? Is Tyvek a Vapor Barrier?
Concrete Vapor Barriers for Under Slabs - Concrete Network
Here is information to help you understand how moisture moves in a slab and how using a vapor barrier can help control the problem. Read more about moisture coming up through concrete, including how to test for moisture vapor transmission. What are Vapor Barriers?
Understanding Vapor Barriers | Architect Magazine
2009年6月8日 · Properly defined, a vapor barrier alone does not control air movement; it controls the movement of moisture. In fact, a vapor barrier is not actually a barrier; it’s a vapor diffusion retarder (VDR). A VDR regulates moisture flow from inside out or …
Vapor Barriers | Building Science Education
A vapor barrier, also called a vapor retarder, is a layer in the building envelope that prevents water vapor from entering the wall cavity. There are three different classes of vapor barriers. The class of vapor required depends on the climate zone and cladding type.
A Complete Guide to Vapor Barriers - gb&d magazine
2022年11月23日 · Understanding the need and proper use of vapor barriers and retarders is crucial when it comes to moisture control. A properly selected and installed under-slab vapor retarder is the first line of defense against water vapor and soil gas migration.