North Texas sits in what atmospheric scientists call "Hail Alley" — a corridor stretching from west Texas through the Panhandle and into the DFW Metroplex where supercell thunderstorms produce more large hail per square mile than almost anywhere else in the world. Dallas averages eight to twelve significant hail events per year, and the hail here is not pea-sized. Storms that produce golf-ball and baseball-sized stones are common enough that we plan our entire spring crew schedule around them.
When a 1.75-inch hailstone hits an asphalt shingle traveling at roughly 75–90 mph, the impact does two things depending on the shingle age and temperature. On a warm-day shingle (above about 70°F), the impact bruises the granule layer — knocking protective granules off the fiberglass mat and leaving a soft, spongy dent. On a cold shingle (below 45°F, which does happen in Dallas in February and March), the impact can crack the mat itself, creating a fracture point that propagates under thermal cycling.
What adjusters are actually measuring
When an insurance adjuster climbs your roof — or reviews drone photos — they are looking for functional damage, which the industry defines as damage that compromises the shingle's ability to shed water and resist further weathering. The standard test markers are: granule loss concentrated at impact points (not the edge-weathering loss you see on old shingles), circular dents with soft centers on a tap test, and bruising visible at a low-angle flashlight sweep.
Adjusters count strikes per 10-square-foot test square, on at least three slopes. The trigger for replacement under most Texas homeowner policies is eight or more functional hail strikes per test square — which on a typical 1,800-square-foot Dallas home translates to 144 total strike points. A moderate North Texas hail event almost always exceeds that threshold on any roof over seven years old.
The critical variable is shingle condition going in. New architectural shingles absorb hail better than aged ones — the granule layer is thicker and the mat is more flexible. By year 12–15, the mat has thermally cycled through hundreds of Dallas summers and winters. An impact that would bruise a new shingle will crack an aged one. That is why the adjuster's scope on an older roof is almost always broader than the homeowner expects.
The documentation that makes or breaks a claim
In our experience, roughly 25% of initial adjuster estimates under-scope the damage — particularly on hip roofs where some slopes get no sunlight exposure and the inspector's time on each face is brief. Our drone photography captures every square foot of every slope in one pass, and Thomas's annotated report marks each visible strike point with GPS coordinates. When we accompany the adjuster re-inspection with that documentation, supplements are approved significantly more often than when homeowners navigate the process alone.
The roof does not lie. The impact pattern from a single hail event is remarkably consistent across a neighborhood — same size, same density per slope by compass direction. If five houses on your street were approved and yours was not, the problem is the documentation, not the damage.