Metal channels used to further inhibit sound transmission through wall and ceiling framing. Create a break in the vibration path from drywall to the framing. A vent mounted along the entire ridge line of the roof to allow the passage of air through the attic or cathedral ceiling. A louver or small dome mounted near the ridge of the roof to allow the passage of air through the attic. Measure of resistance to heat flow.
Insulation materials have tiny pockets of trapped air.
These pockets resist the transfer of heat through material. The ability of insulation to slow the transfer of heat is measured in R-values. The higher the R-value, the better the insulation material's ability to resist the flow of heat through it. The structural material that spans across floor joists. It serves as a working platform during construction and provides a base for the finish floor.