Insulation Thickness For R38 Roof

An r 38 fiberglass batt should be approximately 12 inches thick while the thickness of cellulose insulation of a finished fitted product will larger.

Insulation thickness for r38 roof.

The importance of insulation thickness r value isn t just a time measurement though. 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. The thickness of your r 38 insulation will depend on the material you have the brand and how it s installed.

10 thick r 38c ecotouch thermal batt insulation prevents moisture damage and help assure long roof life by providing 1 of ventilation air space between the insulation and roof deck. Achieving greater r values in attics the higher the r value the better the thermal performance of the insulation. Insulation is designed to eliminate r value loss caused by compressing standard r 38 products in 2x12 cathedral ceiling construction. Find your zone on the map and then use the chart to determine the level of insulation you need to properly insulate your attic walls floors and crawlspaces.