New Windows New Siding Do I Add Foam Board

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.

New windows new siding do i add foam board.

After flashing the window area i am installing 1 x 4 furring strips on top of the foam. 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. I have been planning a energy retrofit of my home in austin texas and here is how i plan on installing my new windows.

One new wrinkle for many builders is walls built with fiber insulation between the studs plus rigid foam insulation applied over the outside walls. 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. How housewrap affects ventilation. Typically installers add a moisture barrier beneath the window frame which extends below the siding as well.

I am adding 1 1 2 inches of foam with a radiant barrier over my existing t 11 siding. But if you use wood clapboard siding foam. By adding a continuous layer of insulation under new siding you are able to wrap the home in a complete blanket of energy savings. 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.

Both ways effectively prevent air leaks and infiltration. 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. The windows are vinyl with a built in j channel. If i add the 1 foam board the vinyl siding will no longer of course fit into the built in j channel.

The method works for both new construction and remodeling and doesn t affect siding and trim details very much. New construction windows will be attached with the flanges to the 1 x 6 pt. Specialized equipment is not required for the installation of foam board. 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.

In addition flat foam insulations can help level out inconsistencies in the wall for a more perfect siding appearance. Originally posted by maxminimus.