.50″ exterior rigid foam, and new construction windows
Edit: I have updated my Question. I have decided on foam and purchased .50″ rigid foam by Foamular. I got a price I couldn’t pass up on. I have also heard from the Window company and found out the windows have 1.5″ of depth to the trim. So, my question now is. Can I just install the house wrap, then install and flash the windows to the house wrap. After that, I can put the rigid foam on and then the fiber cement siding. The Foam + Siding will be less than 1.5″ in thickness so it should be about flush with the windows?
I really appreciate this site and community. I have been reading it like crazy over the past couple months. A lot of the things discussed in this site are not commonly used or talked about in my building area. We live in Zone 4 in rural KY.
We are remodeling a home build in the late 80s to move into. We are removing all the vinyl siding, and the windows completely, and starting over. There is no WRB or insulation on the outside of the home. I plan on adding a tyvek WRB to the home first — Then installing .50″ Rigid Foam Insulation with a R3 value.
Then on top of that will be fiber cement siding.
Most people in my area don’t tyvek wrap houses or worry about any foam insulation. But I think it is important.
I am concerned about installing the windows though. I have read extensively about “innie” and “outie” windows, and how there are several methods to tackle. Most the things I read only speak about larger foam insulation though.
I haven’t read anything specifically for .50″ sizes.
My question is… is that because at those sizes you do not need to do anything special? Is it an easier install? Or do we still need to “buck” around the windows first? My preference is for an “OUTIE” window.
We made a last minute siding change, and I am nervous it will send a ripple through our cost. I ordered all my new construction windows already, and they have the jam extension already fitted to them for standard 2×4 walls. Im afraid if I put the windows “on top” of the rigid foam, those window jams will be useless. Maybe even add labor cost to remove them and put new ones on?
Should I use “innie” windows to be on the safe side with that?
Sorry to be so long winded, this is my first post, and this is the issue that is most driving me crazy!
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