When people think about hail damage to a building, the roof is usually the first concern. But on many commercial properties, the first thing hail actually hits isn’t the roof membrane — it’s the rooftop equipment.
HVAC units, condenser coils, protective screens, and other mechanical systems often sit directly on the roof surface. During a severe storm, these components can take the brunt of the impact. And when they do, the damage can quickly spread beyond the equipment itself.
For property owners and facility managers, understanding this chain reaction is critical.
Rooftop Equipment Is Highly Exposed
Unlike the roofing membrane, which may have protective layers or reinforced materials, HVAC equipment contains delicate components designed for airflow and efficiency — not hail resistance.
During Midwest hailstorms, we often see damage such as:
Bent or crushed condenser fins
Damaged coil panels or protective screens
Dented equipment housings
Loose or displaced equipment covers
Even moderate hail can cause this type of damage. Larger hailstones can compromise equipment performance almost immediately.
How Equipment Damage Affects the Roof
The risk is not just mechanical failure. Damaged equipment can also create roofing problems.
When rooftop units are struck by hail:
Metal fragments or loose panels can scrape or puncture the roof membrane.
Displaced equipment covers can shift during high winds, damaging nearby roofing materials.
Condensate drainage systems may become misaligned, leading to water pooling around units.
Over time, these issues can contribute to membrane deterioration, seam failure, and moisture infiltration into the roofing system.
Drainage Problems After a Storm
Hailstorms often leave behind more than dents.
Debris from damaged equipment — including coil fragments, insulation material, and protective mesh — can end up blocking nearby drains, scuppers, or gutters. When drainage is restricted, water can begin to pond on low-slope commercial roofs.
Standing water increases the risk of:
Membrane wear
Seam stress
Water infiltration into insulation layers
What started as equipment damage can quickly turn into a roofing problem.
Why Post-Storm Inspections Matter
After a significant hailstorm, it’s important to inspect both the roof and the rooftop equipment.
A professional inspection helps identify:
Membrane punctures caused by equipment debris
Drainage issues near mechanical units
Flashing damage around equipment curbs
Early signs of moisture intrusion
Many of these issues are difficult to see from the ground but can lead to costly repairs if left unaddressed.
Protecting Your Building After a Hailstorm
Storm damage isn’t always obvious immediately after the weather clears. Small problems around rooftop equipment can gradually affect the performance of the entire roofing system.
A timely inspection helps catch those issues early and ensures both the roof and the equipment it supports remain in good condition.
At Jewett Roofing, our team works with commercial property owners across Missouri and Illinois to evaluate roof systems after severe weather and identify potential storm-related damage before it becomes a larger problem.
Reliable commercial roofing inspections and repairs when you need them most.
