Window cap/head flashing: 0, 1, or 2?
New construction project here and I’m getting ready to install window trim and then siding. I have ply gem vinyl windows installed which have an integrated nailing flange. Windows protrude 1 3/8″ and are fully flashed with peel and stick. Siding and trim will be installed over 3/8 in Rainvent battens.
I’ve seen many different variations now and I’m wondering how many aluminum flashings should be installed above the window. One over the window head and another over the wooden head trim or just one of these or none? Water does currently pool on the flat window head when it rains which suggests to me that a cap flashing there would be a good idea.
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