Materials & Shingles · FAQ

Which parts of a roof actually fail in high wind?

The corners and edges. Wind pressure on a sloped roof concentrates within 6 feet of the eaves, the rakes (gable ends), and the ridge. On a typical Illinois home, that’s about 25% of the roof surface taking 60% of the uplift force. Trill applies extra fastening and roofing cement to all four of these zones on every job.

The remaining 75% of the field — the middle of slopes — sees much less pressure and almost never fails first. If you see scattered shingle loss on a home after a wind event, look at the perimeter: that’s where the original install probably skimped on the high-wind zone detail.