Proper Insulating Roof Ceiling

Sprayed against the underside of the roof deck it seals against air movement eliminating the need for a vapor barrier or ventilation.

Proper insulating roof ceiling.

The right way to insulate attics and cathedral ceilings with batts using certain t. To insulate the roof itself you either use spray foam or retrofit with it with rigid foam board. If you re insulating the roof directly. Shower thoroughly after you re done for the day to remove fibers from your skin and launder your work clothes after one wearing.

Always cover the tops of the ceiling joists to make sure the insulation is deep enough to reach your target r value and to prevent thermal bridging the heat loss that occurs through the wood framing. When tom insulates a cathedral ceiling or a finished attic he also turns to foam. This can be achieved through the use of truss joists scissor truss framing or sufficiently large rafters. Cathedral ceilings must provide space between the roof deck and home s ceiling for adequate insulation and ventilation.

But its open cell structure still allows moisture to escape. Purchase rolls or packages of insulation that will fit in the spaces between the ceiling joists. Illustration by ian worpole. For example cathedral ceilings built with 2x12 rafters have space for standard 10 inch batts r 30 and ventilation.