Rigid Foam Sheathing Siding

Install continuous rigid foam insulation or insulated siding to help reduce thermal bridging through wood or metal framed exterior walls.

Rigid foam sheathing siding.

A common choice is drywall. It is offered in multiple thicknesses and dimensions in both square edged and tongue and groove joints. 3 benefits of rigid foam sheathing. Insulated foam sheets are also used as an insulated sheathing underlayment for exterior siding.

Thick narrow siding. Many houses built today have a double wall type of insulation with fiberglass batts fastened between the studs on the inside and rigid foam board over the wall sheathing on the outside. Keep in mind that any interior rigid insulating panel must be covered by a barrier. But if you use wood clapboard siding foam sheathing can cause trouble.

The following recommendations are meant to minimize potential problems when cedar sidings are applied over rigid foam sheathing. Rigid foam across foundation also. 1 in x 4 ft x 8 ft ap foil 1 faced polyisocyanurate foam board insulation item 101645 model 90001019. Johns manville r 6 common.

1 in x 4 ft x 8 ft. More effective insulation with r values ranging from 3 6 to 8 0 rigid foam sheathing has much better insulation per inch than other materials i e. Our house is 2x6 construction built in 1984 near milwaukee wi. Plywood has an r value of 1 25 and fiberglass batts have an r value of 3 14.

Follow with a 2x4 frame wall and insulate it with batt insulation. Rigid foam sheathing can cause moisture to accumulate on the back of siding and cause staining buckling and damage to finish coats. The panels provide a continuous energy efficient surface. Insulfoam rigid foam is a high performance built to spec sheathing insulfoam rigid foam is a high performance built to spec sheathing insulation that provides superior r value and moisture resistance.

Moisture can get trapped between the siding and the foam leading to paint failure and causing clapboards to cup and curl.