­
Back To Category
1316 Vapor Diffusion - Insulation Energy Efficiency - The Basics
 
1316 Vapor Diffusion - Insulation Energy Efficiency - The Basics -

Image Text: Initial state > membrane (air barrier) stops air, but allows migration of moisture (vapor diffusion) towards the area of lower vapor pressure > 70 degrees Fahrenheit > 80% relative humidity > migration > 70 degrees Fahrenheit > 20% relative humidity > Over time > the relative humidity on either side of the air barrier eventually equalizes > 70 degrees Fahrenheit > 50% relative humidity > grains of moisture > air barrier > 70 degrees Fahrenheit > 70 degrees Fahrenheit > 50% relative humidity

Powered by Phoca Gallery

Image courtesy of Carson Dunlop. To purchase images, go to CarsonDunlop

INSULATION

The Basics, Air/Vapor Barriers (Vapor Retarders), Venting Roofs, Venting Living Spaces, Attics, Flat and Cathedral Roofs, Walls Above Grade, Basements and Crawlspaces, Floors over Unheated Areas, Ventilation Systems

­