Granule Loss and Shingle Oxidation from Sacramento Valley Heat
Sustained triple-digit summer heat oxidizes the asphalt binders in composition shingles and accelerates granule release, leaving the fiberglass mat exposed to direct UV and moisture infiltration. Once granules shed, the mat cooks and curls, and the shingle loses its ability to shed water at the laps. Our technicians use both drone imaging and physical inspection to determine whether granule loss has crossed the repair threshold or whether full residential roofing replacement is the correct call for the property.



