New Window And Siding Install Over Foam Board

Below are some of the design details along with the benefits.

New window and siding install over foam board.

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. 1 x 6 pt is installed around my window openings and will be flush with the furring strips. New construction windows will be attached with the flanges to the 1 x 6 pt. But if you use.

Siding over rigid foam. After flashing the window area i am installing 1 x 4 furring strips on top of the foam. It typically is installed over rigid foam board insulation fastened to wood wall sheathing. The standard method guide follows a more traditional installation approach whereby an integral flanged window unit is installed with the flanges mounted directly over the foam sheathing meeting specifications appropriate for this application.

We put 2 x 4 furring studs laid flat over the foam and attached to the wall studs with 1 5 inch foam between the furring studs rain screen over everything and finally the lp siding. Installing foam board insulation under vinyl siding today more than ever before homes are being built with foam board insulation installed on the outside of the sheathing and under the siding. Vinyl siding can be used in original construction or as a replacement for old siding. This detail is used with both new construction and also with renovation work.

I am adding 1 1 2 inches of foam with a radiant barrier over my existing t 11 siding. Both ways effectively prevent air leaks and infiltration. One new wrinkle for many builders is walls built with fiber insulation between the studs plus rigid foam insulation applied over the outside walls. Some builders think that homes with picture frame window construction where windows are framed with strapping lumber before windows are installed should have the rigid foam go on first with the house wrap over that.

In particular the foam sheathing should be minimum 15psi compressive strength rated. This only increases the wall thickness 3 4 inch vs the furring strips william costello was planning to use and would only require increasing the interior window. Removing existing siding and installing osb has several benefits such as having brand new substrate on the home and the ability to inspect the wall cavity and all framing insulation and structural integrity of the home before replacing siding.