Roofs do not weather the same way everywhere in Clark County. These are the
pressures we actually see on Washougal homes.
01 Gorge wind, at its strongest
East wind events through the Gorge routinely reach speeds that lift inadequately fastened shingles. In Washougal this is not an occasional storm concern, it is a design consideration. Edge fastening, starter course, and ridge detail carry loads here that they never see a few miles west.
02 Wind-driven rain
Wind and rain arriving together push water horizontally, and horizontal water gets into places vertical water never reaches — under shingle edges, behind flashing, through vents built for gravity rather than pressure. Leaks in Washougal frequently appear during wind events and then stop, which makes them harder to trace and easier to misdiagnose.
03 Debris impact
Strong east winds carry branches and grit. Repeated small impacts wear granules off the windward slope faster than weathering alone would, so it is common to see one slope in noticeably worse condition than the rest of the roof.