Hail Impact Leaves More Than Surface Marks

The decision between repairing individual components and replacing full sections of roofing material depends on impact density—how many hits per square foot the material absorbed. Low-density impact may allow for targeted flashing replacement and spot shingle work, while high-density hail events that strike a consistent area of the roof typically require full plane replacement to restore uniform performance. Calderon Construction evaluates impact density across each roof plane separately, since hail trajectories produce uneven distribution across different elevations and pitches.

After hail damage repairs are complete, gutters hold their shape and pitch without the concave depressions that trap debris and restrict drainage, and the roof surface shows a consistent granule layer without the bare circular patches that indicate mat fracture. Shingles that were bruised beneath the surface but not immediately leaking would have degraded rapidly over the following seasons; replacing those sections removes the accelerated failure timeline from the home's maintenance picture.

On mid-century residential construction common in Moline's established neighborhoods, valley flashing is sometimes installed in open configuration rather than closed or woven, and those open valleys concentrate hail impact across the exposed metal in a way that accelerates deformation. Inspecting valley flashing on those properties requires evaluating both the metal condition and the edge shingles that border the valley, since the two components work together to manage water at that high-volume drainage point.