Window trim flashing details on a flanged window?
I plan to have Marvin Elevate, flanged windows installed using the Marvin Method and integrated into Benjamin Obdyke hydrogap WRB. This means that the WRB will lap on top of the upper nailing flange for positive drainage. The windows will then need to be trimmed with 5/4 x 4 trim and usually, the siding folks apply z flashing to the top of the trim. If they do that, should the hydrogap be cut so the z flashing goes under, or should they use tape, or some other method?
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