Raptor Chicken
Songster
Are there pros and cons to installing them onto the framing or onto the siding other than the extra work of cutting the siding?
I checked out your build thread and really like your design!
Technically your windows are designed to have siding run to the window, thats why there's that gap between the flange and face of the window.
Mine are flush mount windows and don't have that gap.
You could do yours either way. The important thing to remember is to apply proper quality silicone in the appropriate areas before you mount and also once you've trimmed out the window.