Carpentry & Building ConstructionChapter 31:
Thermal & Acoustical InsulationChapter SummariesSection 31.1 Thermal Insulation
Thermal insulation is available as flexible batts and blankets, rigid board, loose fill, and spray foam. Insulation helps to reduce heat gain as well as cooling loss. R-value is the measure of an insulator's effectiveness. A vapor retarder limits water vapor penetration. Section 31.2 Acoustical Insulation
The amount of sound transmitted through a house can be reduced with the proper wall and ceiling construction. The STC and INR ratings measure a material's resistance to sound transmission.  | 
