Insulating Beneath Siding

Wall 3 r 19 in the cavity plus r6 1 foam board under the vinyl.

Insulating beneath siding. 3 ways to insulate siding and reduce home energy loss blown in insulation. Some people use roofing nails but if a strong gust of wind gets under the siding it may not hold. Fit the rigid foam insulation snugly and seal all seams with the specialized tape. Apply sealant around windows doors and trim.

As a result the siding cups cracks and sheds paint. The nails have a plastic cap that keeps them from damaging the foam. Has 16 8 2 6 studs. Foam is less permeable to water vapor and the back of the siding stays wet as the face of the siding dries.

To be completely efficient this insulation type has to mold perfectly with the inside of your home siding. Wall 4 r 19 in the cavity plus r12 2 foam board under the vinyl. The insulation is glued in place for a permanent connection. Wall 1 insulated with only r 19.

Continuous insulation under new siding has become a popular way to improve energy efficiency on. Wall 2 insulated with high density spray foam at a nominal 4 inches in the cavity for a cavity r value of 24. Installation of this insulation type under fiber cement siding can create an incredible 600 more energy efficient home. Hot sun can overheat wood siding causing it to dry excessively and crack.

Behind this skin is a layer of expanded polystyrene eps that is form fitted to the stepped siding profile of the vinyl. To secure the foam use two inch cap nails. When new siding is installed the old siding can be left in place or torn off before the new.