Installing windows to be replaceable without compromising the WRB
I'm (very slowly) planning to retrofit a few inches of foam onto my house, with a rainscreen and new fiber cement siding. I don't think new windows are justified from an energy point of view, nor do I particularly want to spend the money on them. But they're vinyl and I really don't think they're going to last as long as the siding, so I'm going to re-install them with proper flashing with the intent of making it possible to replace them in the future without too much pain.
How should I do this? Using the typical self-adhered flashing products (I'm leaning towards DuPont FlexWrap and StraightFlash to tie in with the Tyvek) means that several inches need to be accessible around the window. So that means I need maybe 1x4 trim around the window, which I'm okay with. I will also need to cut away the foam around the window to get access, which is fine -- I can just re-attach the cut off pieces afterwards. I think there will also need to be rainscreen boards underneath that will need to come out and put back in. Will I try to tear off the flashing? Will it even come off? Do I just stick new flashing over it? Or do I somehow cut it off and add new Tyvek/flashing around the whole window opening? I'm not sure even 1x4 trim would leave enough room to do that well. 1x6 might look excessive on my small house.
Posted Fri, 01/03/2014 - 17:49
Edited Fri, 01/03/2014 - 17:50
Other Questions in Green building techniques