Winter is the load-bearing season. Snow piles on the roof. The eaves stay below freezing. Warm attic air leaks up — bath fans, top-plate gaps, can lights — and melts the snow from below. The runoff hits the cold eave and refreezes. The dam grows. Water backs up under the shingles and into the wall.
Vents alone do not fix this. The order is air-seal first, insulate second, vent third. Add ridge vent to a leaky attic and the dam gets worse, not better. The right scope finds the warm spot, seals it, tops the insulation to R-49, then balances intake and exhaust. In that order.
Wind and freeze-thaw on the field. Ohio supercells are real but rare. The slow damage mode is wind-uplift on old shingle and granule loss from freeze-thaw. Both are carrier-pay when the file is tight. Carriers push older Ohio roofs to ACV. Cosmetic-damage exclusions creep into renewals. The file has to be tight.
The matching law works for you. Ohio Code 3901-1-54(I) is one of the strongest matching rules in the country. When a damaged wall cannot be made to match an undamaged wall, the carrier funds the match. We argue it on every claim where the line-of-sight test fails.