For the egress window & sliding door upstairs in the framed walls, I bought some flexable 9" Typar flashing. It can be formed as one piece around the corners and onto the OSB.
I will prime the OSB around the openings with Glidden Gripper. This stuff really works, u can even glue foam to foam with it.
To reduce infiltration (which is a BIG issue) I will prime & tape all of the OSB joints.
BTW, why don't window companies have to specify infiltration using a standardized method?
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