I have been looking at how to flash a window and have concluded that I'll need to remove an existing window, flash the frame and re-install it. All of the guides I have read use an air barrier that is not included in the foam board, meaning they can cover the window frame and cut the wrap in order to fold it into the frame and flash properly.
What I am wondering is, what is the correct way to flash a window when using an air barrier that is stuck to the foam board insulation?
I was thinking of buying the smallest roll of House Wrap and just cutting a section out to cover up the width of the window, but if this is not necessary i'd rather not spend the time/money.
I can't find anything in the Isoclad manufacturer's website or the product manual.