For those who haven’t heard of this type of window installation, it’s a regular window (sometimes DH, sometimes just a stationary sash) tucked on a gable wall just below, and parallel to the rake trim. It’s installed on a slant to match the rake angle.
I have an attic buildout to do and it’ll include installing two of these in a gable. Walls are 2×6 with 1/2 plywood sheathing, and 6″ cedar clapboards. I’ll be installing Andersen stationary casements (C135) about 12″ down from the bottom of the rake trim, roof pitch is 12/12.
I am thinking of building rough opening boxes with 2x6s, then inserting them into the wall (chopping out the necessary studs and sheathing). No headers or jacks though I’m thinking that I will double up the lumber on the RO boxes. Then panning the two lower sides with peel and stick membrane, the install, flash and trim as you would a normal window.
Anyone have a better idea?