Thoughts on this Unconventional Window Head Flashing Detail
Owner builder here. I’m building a small shed workshop, permits required and pulled, and am in a bit of a dispute with the inspector over my window flashing detail.
I’ve framed the building with hardie panel over battens, and building paper. No sheathing. This is to code and good enough for a shed given the price of osb.
I’ve installed the windows over the hardie. In retrospect, I would have installed them first and put the hardie over top of the flange and head flashing.
with the hardie being considered my sheathing membrane, I have sealed the sill, jamb with liquid applied flashing, taped the sides of the flange and sealed the head flashing with liquid applied.
the inspector wants me to pull it all down and put the flashing inbound of the hardie, and building paper. He doesn’t trust the liquid applied.
frankly, I think my solution is fine. There’s going to be trim and caulking above that. That’s 3 levels of protection, keeping moisture from getting in behind the window flange.
I see people using zip tape here and calling it good, but my inspector says gravity method or nothing.
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