Rigid foam sheathing can cause moisture to accumulate on the back of siding and cause staining buckling and damage to finish coats.
Rigid foam sheathing siding.
Insulated foam sheets are also used as an insulated sheathing underlayment for exterior siding.
2 in x 4 ft x 8 ft 1 faced polystyrene garage door foam board insulation item 15357 model 2x48x96 r tech.
3 benefits of rigid foam sheathing.
Our house is 2x6 construction built in 1984 near milwaukee wi.
Moisture can get trapped between the siding and the foam leading to paint failure and causing clapboards to cup and curl.
Install continuous rigid foam insulation or insulated siding to help reduce thermal bridging through wood or metal framed exterior walls.
The cavity is stuffed with fiberglass then expanded foam sheathing followed by cedar board and batten siding.
Plywood has an r value of 1 25 and fiberglass batts have an r value of 3 14.
Use thicker siding patterns in widths of 8 203 mm or less.
Current pneumatic nailers have maximum fastener lengths of 3 to 3 5 which limits insulation thicknesses to 1 5 max 3 5 fastener to siding 1 embedment 3 5 0 5 1 5 1 5 max insulation therefore for insulation greater than 1 5 direct.
Rigid foam across foundation also.
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.
Sheathing and penetrate framing a minimum 1 inches.
The panels provide a continuous energy efficient surface.
The following recommendations are meant to minimize potential problems when cedar sidings are applied over rigid foam sheathing.
This eliminates thermal bridging which is the energy lost through wall studs.
Thick narrow siding.
Install rigid foam over or in place of plywood osb or other wall sheathing.