New Window And Siding Installation Over Foam Board

1 x 6 pt is installed around my window openings and will be flush with the furring strips.

New window and siding installation over foam board.

One new wrinkle for many builders is walls built with fiber insulation between the studs plus rigid foam insulation applied over the outside walls. Air seal and insulate a nail fin window in a wall with exterior rigid foam insulation. Use tape supplied by the manufacturer of the foam board. 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.

After flashing the window area i am installing 1 x 4 furring strips on top of the foam. It provides an r value of 4 per inch of thickness and is the cheapest type of foam board insulation. Spray foam and high quality sealant bridge all of the gaps between the framing shims and window for a durable and energy efficient installation. Siding over rigid foam.

This foam board insulation is the rigid pink or blue panels that can be found at home centers in many different thicknesses. This detail is used with both new construction and also with renovation work. 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. Eps is used under roofing over foundation walls and beneath siding.

In particular the foam sheathing should be minimum 15psi compressive strength rated. 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. But if you decide to do it install vertical strapping over the foam board. Seal the seams between panels wall corners and door and window openings once the entire house is covered with foam board.

New construction windows will be attached with the flanges to the 1 x 6 pt. But if you use. This will not only offer a nail base for the siding but will also let the back of the siding breath and both it and any paint finish will last a lot longer.