New Window And Siding Installation Over Foam Board

Air seal and insulate a nail fin window in a wall with exterior rigid foam insulation.

New window and siding installation over foam board.

In new construction it typically is installed over wood wall sheathing wrapped with rigid foam insulation and a moisture barrier. Below are some of the design details along with the benefits. From there i would tape the seams install flashing over the entire top of the new window replace whatever foam board you had to remove and then put back the vinyl siding with j channel. Since the brick mould that was removed was approximately 1 2 in width you ll have to re trim the new window with comparable trim boards.

Even with 3 4 we have to build out the window and door frames so they are not recessed. 1 4 is typical 3 4 is maximum. One new wrinkle for many builders is walls built with fiber insulation between the studs plus rigid foam insulation applied over the outside walls. 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.

Siding over foam insulation. New construction windows will be attached with the flanges to the 1 x 6 pt. Spray foam and high quality sealant bridge all of the gaps between the framing shims and window for a durable and energy efficient installation. This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses.

Seal the seams between panels wall corners and door and window openings once the entire house is covered with foam board. I am adding 1 1 2 inches of foam with a radiant barrier over my existing t 11 siding. In particular the foam sheathing should be minimum 15psi compressive strength rated. This detail is used with both new construction and also with renovation work.

On existing houses old vinyl or metal siding must be removed but. After flashing the window area i am installing 1 x 4 furring strips on top of the foam. Eps is used under roofing over foundation walls and beneath siding. It provides an r value of 4 per inch of thickness and is the cheapest type of foam board insulation.

But if you use. Siding over rigid foam. If you are looking for insulation have an insulation crew who can blow in the insulation come and drill holes from the outside and blow in the insulation.