Hail Damage and Commercial Roof Inspections

29 May 2026

How Post-Storm Roof Inspections Help Document Hail Damage and Water Intrusion Risk

Hail damage is not always easy to spot right after a storm. A commercial roof may appear intact from the ground, while impact damage, displaced flashings, weakened seals, and moisture-related issues begin to develop at seams, penetrations, drains, roof edges, and rooftop equipment.

For building owners, property managers, facility teams, and insurers, timing is important after a hail event. Conducting a roof inspection soon after the storm creates a stronger record of conditions before cleanup efforts, temporary repairs, or additional weather events alter what can be documented.

Hail rarely affects the roof system alone. These storms are often accompanied by high winds and wind-driven rain, placing stress on roof assemblies from multiple directions. While hail may damage the roof surface, wind and water can expose weaknesses at transitions, attachments, drainage points, and other vulnerable areas.

The financial impact is significant. According to the Insurance Information Institute, NOAA’s Storm Prediction Center reported 5,432 hail events in 2025, up from 5,373 in 2024. Swiss Re also reported that severe convective storms caused $51 billion in insured losses in 2025.

What Hail Leaves Behind

Commercial roof damage can vary significantly depending on the roof type, hail size, storm duration, wind conditions, and the age and condition of the roof assembly.

Single-ply membranes may show fracturing, punctures, splits, or stress around seams. Built-up and modified bitumen roofs may lose protective surfacing or sustain membrane damage from repeated impacts. Metal roofing systems may dent, lose their protective coating, or become more vulnerable to corrosion over time. Roof-mounted equipment, skylights, vents, curbs, and accessories may also sustain damage that affects overall performance.

Some damage appears right away, while other conditions develop over time. A small puncture, displaced flashing, clogged drain, or compromised seal may not result in an active issue during the storm, but it may become a future water entry point during subsequent rain events.

That is why post-hail roof inspections should look beyond visible impact marks. A comprehensive review evaluates how the roof assembly, drainage systems, penetrations, edge conditions, and surrounding envelope components performed during the storm event.

Why Roof Inspections Should Occur Quickly

After severe weather, building teams often prioritize obvious damage, tenant concerns, debris removal, and immediate safety issues. While those steps are important, roof documentation should be delayed.

A timely roof inspection helps separate recent storm-related damage from long-term wear, deferred maintenance, or conditions from previous weather events. This is especially relevant during active storm seasons, when a roof may experience multiple hail, wind, and rain events within a short period.

Early documentation also provides building owners, property managers, insurers, consultants, and contractors with a consistent record of observed conditions. Photographs, field observations, moisture findings, and repair recommendations create a stronger basis for decision-making and project planning.

Critical Areas to Review After Hail

A focused commercial roof inspection should evaluate not only the roof surface, but also the details and the transitions that commonly contribute to water intrusion.

Key review areas include:

• Field membranes and seams
• Roof edges and flashing conditions
• Penetrations, curbs, drains, and scuppers
• Transitions between materials
• Roof-mounted equipment and accessories
• Skylights and other exposed components
• Drainage paths and debris accumulation
• Substrate conditions where concealed damage may exist
• Interior areas with staining, dampness, odors, or signs of water intrusion

These areas are often where long-term performance problems begin. Even when the primary roof system appears sound, damage at transitions and details may create pathways for water intrusion.

Documentation Supports Better Decisions

Post-storm roof inspections are not only about identifying damage. They also create a documented record that helps building teams determine the appropriate next steps.

Inspection documentation may support maintenance planning, repair scope development, insurance review, capital planning, or contractor coordination. It may also help determine whether a roof requires localized repairs, additional forensic investigation, moisture evaluation, or broader replacement planning.

For commercial properties, detailed documentation reduces confusion after a storm. It provides stakeholders with a shared understanding of observed conditions, identified concerns, and recommended actions.

How Intertek Supports Post-Storm Roof Evaluation

Intertek provides roofing inspections, testing, and consulting services related to roof performance, condition, and code compliance. Following hail and other severe weather events, Intertek can evaluate the roof systems, document observed conditions, and evaluate how materials and details performed under storm exposure.

Evaluations may include flashings, attachment conditions, drainage performance, moisture concerns, roof-mounted equipment, and other critical areas where performance may have changed. When repairs or replacements are warranted, Intertek can provide recommendations and supporting documentation as part of the project scope.

When follow-up documentation is included in the scope, Intertek can also help owners maintain a project record tied to observed conditions, completed work, manufacturer requirements, and recognized industry standards.

Planning for the Next Storm

Hail season does not end with a single event. Storm activity may continue throughout the summer, and a roof that performed well during one storm may respond differently during the next.

For building owners and facility teams, post-storm follow-up should go beyond a quick visual review. Recording the storm date, known hail size, visible roof conditions, rooftop equipment damage, signs of interior moisture, and drainage concerns provides a stronger starting point for future evaluation.

A timely inspection helps identify hidden damage, document current conditions, and establish an informed path forward before minor deficiencies become larger building envelope concerns.