How do I detail attic eaves and roof-to-wall intersections to stop wind-driven rain and ice-dam leaks in NYC?
Start with a Bulletproof Perimeter Eaves and roof-to-wall joints are the most common leak points in finished attics. Sequence drip edge over ice-and-water shield at eaves, then underlayment laps correctly up-slope; at sidewalls and dormer cheeks, use step flashing layered with WRB counterflashing, never face-sealed caulk alone. Extend self-adhered membrane at valleys and around penetrations,...
