Insulation Thickness For R38 Roof

Insulation is designed to eliminate r value loss caused by compressing standard r 38 products in 2x12 cathedral ceiling construction.

Insulation thickness for r38 roof.

Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Knauf insulation r 38 ecobatt kraft faced high density fiberglass insulation batt 10 1 4 in. The thickness of your r 38 insulation will depend on the material you have the brand and how it s installed. The fiberglass comes in rolls also known as batts which vary in size.

Drill holes in the sheathing and blow insulation into the empty wall cavity before installing the new siding and. It takes into account the size of the sample and the overall change of temperature over time so that you can compare thermal conductivity of materials tested with plates of different temperatures or even that were tested by other methods. An r 38 fiberglass batt should be approximately 12 inches thick while the thickness of cellulose insulation of a finished fitted product will larger. The importance of insulation thickness r value isn t just a time measurement though.