Hail is one of the most deceptive forms of storm damage. A storm that lasts 10 minutes can leave behind damage that isn't visible from the ground, doesn't cause immediate leaks, but quietly compromises your roof's ability to protect your home — sometimes for months before you know anything is wrong.
In Idaho Falls, the peak hail season runs from June through August, with July historically producing the most significant events. The Bonneville County area sees hail ranging from pea-sized to golf ball diameter, with the most damaging storms typically tracking from southwest to northeast across the Snake River Plain.
Why Hail Damage Is Harder to Spot Than You Think
The impact of hailstones on asphalt shingles isn't always obvious. Small hail (under 1 inch diameter) may leave impressions that fracture the shingle's granule coating without penetrating the underlying mat — a form of damage that accelerates weathering dramatically but doesn't cause immediate leaks. Larger hail causes visible cracks, bruising, and dents, but these are often difficult to assess safely from the ground and easy to misinterpret.
What matters most is that damaged shingles — even shingles that look intact from the ground — no longer perform as designed. Water infiltration begins subtly: along the rake edge, through flashing, or via granule-depleted low spots that allow UV degradation to accelerate. The first visible sign of a problem is often a water stain on an interior ceiling, which appears months after the storm that caused it.
What a Professional Damage Assessment Covers
A professional storm damage inspection looks at more than just shingles. A complete assessment covers:
- Shingles: Impact marks, granule displacement, cracking, bruising, and mat damage
- Ridge cap and hip shingles: Often the first point of failure after hail
- Flashing: Metal flashing around chimneys, skylights, and vents dents visibly from hail and can allow water infiltration at the joint
- Gutters and downspouts: Dented gutters are one of the clearest indicators of hail size and impact energy
- Siding: Aluminum, vinyl, and wood siding all show impact marks at different thre



