Exterior Wall Insulation Under Siding

Rigid foam insulation is available in different thicknesses.

Exterior wall insulation under siding.

Condensation and elevated moisture levels cause rot mold and mildew. 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. It also provides a. The backside of the insulation is flat so the siding installs flush against the home s exterior wall sheathing.

That s like having one entire wall of a home with no insulation. By adding a continuous layer of insulation under new siding you are able to wrap the home in a complete blanket of energy savings. Will this cause any condensation issues. The windows are being removed and moved out the 2 to line up with the foam board.

It adds insulation waterproofing and structural support for the framing. The house has wrap under the siding. The insulation is glued in place for a permanent connection. In addition flat foam insulations can help level out inconsistencies in the wall for a more perfect siding appearance.

Drill holes in the sheathing and blow insulation into the empty wall cavity before installing the new siding and. The wood that goes under residential siding exterior sheathing performs several functions. If you are doing a remodeling of the entire exterior or new construction this may not be a concern. I am having the siding removed from our house and 2 foam board but under the siding.

The insulation itself can be up to 1 25 inch thick at its thickest point but due to the stepped profile much of the insulation is thinner. If you purchase foam insulation that is too thick it may pose a problem by pushing the wall system too far out from the existing windows and trim. Wall insulation whenever exterior siding is removed on an. Exterior wall sheathing is either structural or non structural.

Structural exterior wall sheathing ties framing studs together making the walls resistant to twisting and bending. Exterior wall sheathing strengthens the wall system provides a nailing base for the siding and gives a layer of protection against outside elements. Add r5 insulative wall sheathing beneath the new siding. A continuous layer of insulating sheathing applied to the exterior surface of a wall will minimize condensation and moisture levels.

If the exterior wall sheathing is below the dew point temperature condensation will form on the sheathing.