Sunday, July 8, 2007Flashing Interior Flashing, house wrap, exterior trim, and siding each play different roles in a weather barrier system. In order for them to do their jobs, the system's components must be overlapped correctly. Like the skin of a fish, there are big scales and little scales, but they all face in the same direction.
In fact, incorrectly installed flashing is worse than no flashing at all, because it actually funnels water into the building instead of shedding it to the exterior. It's not that difficult to figure out the right way to overlap. Use this rule: That which is above overlaps that which is below.
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