Insulating Beneath Siding

Hot sun can overheat wood siding causing it to dry excessively and crack.

Insulating beneath siding.

Wall 2 insulated with high density spray foam at a nominal 4 inches in the cavity for a cavity r value of 24. Wall 4 r 19 in the cavity plus r12 2 foam board under the vinyl. Some people use roofing nails but if a strong gust of wind gets under the siding it may not hold. Has 16 8 2 6 studs.

The insulation is glued in place for a permanent connection. As a result the siding cups cracks and sheds paint. To secure the foam use two inch cap nails. In fact you can check if it is a correct insulation installation by pressing on the house siding.

Apply sealant around windows doors and trim. Fit the rigid foam insulation snugly and seal all seams with the specialized tape. Wall 3 r 19 in the cavity plus r6 1 foam board under the vinyl. Insulated vinyl siding has an outer skin made of polyvinyl chloride or pvc just like standard vinyl siding.

To be completely efficient this insulation type has to mold perfectly with the inside of your home siding. Foam is less permeable to water vapor and the back of the siding stays wet as the face of the siding dries. Continuous insulation under new siding has become a popular way to improve energy efficiency on. 3 ways to insulate siding and reduce home energy loss blown in insulation.

When new siding is installed the old siding can be left in place or torn off before the new. Installation of this insulation type under fiber cement siding can create an incredible 600 more energy efficient home. Behind this skin is a layer of expanded polystyrene eps that is form fitted to the stepped siding profile of the vinyl.