New Windows New Siding Do I Add Foam Board

I have been planning a energy retrofit of my home in austin texas and here is how i plan on installing my new windows.

New windows new siding do i add foam board.

If you have your contractor install the siding prior to replacing the windows they may have to cut into your lovely new siding to put that barrier in place. 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. Using exterior rigid foam board insulation is a great way to make a building more energy efficient quieter and more likely to prevent moisture infiltration problems. Originally posted by maxminimus.

The method works for both new construction and remodeling and doesn t affect siding and trim details very much. 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. They said that to increase the r value of your home you should put 2 inch foam board insulation on the walls over the sheathing then wrap and then side them.

If i add the 1 foam board the vinyl siding will no longer of course fit into the built in j channel. The window sills are flashed using a 1 4 dam along the interior edge of the sill and the side and top nailing fins are flashed to the sheathing. What are my options for weatherproofing this juncture of the siding to the windows when the 1 foam board projects the siding outward 1 from the sheathing. 1 x 6 pt is installed around my window openings and will be flush with the furring strips.

The windows are vinyl with a built in j channel. By adding a continuous layer of insulation under new siding you are able to wrap the home in a complete blanket of energy savings. Both ways effectively prevent air leaks and infiltration. Specialized equipment is not required for the installation of foam board.

If you are doing a remodeling of the entire exterior or new construction this may not be a concern. Bottom line is exterior foam insulation is a good investment. New construction windows will be attached with the flanges to the 1 x 6 pt. In addition flat foam insulations can help level out inconsistencies in the wall for a more perfect siding appearance.

After flashing the window area i am installing 1 x 4 furring strips on top of the foam. But if you use wood clapboard siding foam.