Wind Uplift Resistance Calculator

How It Works

Wind does not blow roofing off — it lifts it off from below. As wind flows over a roof, it creates negative pressure (suction) on the leeward side, much like an airplane wing. This uplift is strongest at roof edges and corners, where pressure can be 2-3x higher than the field (center) of the roof. ASCE 7 divides the roof into three zones: field (lowest pressure), edge/perimeter (moderate), and corner (highest). Shingle wind ratings are tested per ASTM D3161 and D7158 — Class F handles 110 mph, Class G handles 120 mph, Class H handles 150 mph. In hurricane zones, use 6 nails per shingle instead of 4 and add roofing cement at edges.