Insulating Beneath Siding

Insulated vinyl siding has an outer skin made of polyvinyl chloride or pvc just like standard vinyl siding.

Insulating beneath siding.

To be completely efficient this insulation type has to mold perfectly with the inside of your home siding. The nails have a plastic cap that keeps them from damaging the foam. Behind this skin is a layer of expanded polystyrene eps that is form fitted to the stepped siding profile of the vinyl. Wall 1 insulated with only r 19.

Wall 2 insulated with high density spray foam at a nominal 4 inches in the cavity for a cavity r value of 24. 3 ways to insulate siding and reduce home energy loss blown in insulation. Apply sealant around windows doors and trim. Plastic foam traps heat and moisture beneath the siding.

Some people use roofing nails but if a strong gust of wind gets under the siding it may not hold. Hot sun can overheat wood siding causing it to dry excessively and crack. 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.

Wall 3 r 19 in the cavity plus r6 1 foam board under the vinyl. As a result the siding cups cracks and sheds paint. When new siding is installed the old siding can be left in place or torn off before the new. The insulation is glued in place for a permanent connection.

Has 16 8 2 6 studs. Fit the rigid foam insulation snugly and seal all seams with the specialized tape. Foam is less permeable to water vapor and the back of the siding stays wet as the face of the siding dries.