Seasonal Guide
Storm season rewards preparation that happened months earlier. High wind, wind-driven rain, and hail expose any weakness in a roof's edge metal, fastening pattern, and detail work, and the buildings that come through best are the ones where loose terminations and tired flashings were corrected before the first system arrived. Just as importantly, the owners who recover fastest after a storm are the ones who documented their roof beforehand. We advise building owners, REITs, and facility teams to treat storm-season readiness as two parallel jobs: hardening the roof physically, and building the paper record that turns a damage event into a clean, defensible insurance claim.
Edge Metal and Wind Uplift
Most wind damage to low-slope roofs begins at the perimeter. Wind creates the highest uplift pressures at edges and corners, and once it catches a loose piece of coping or fascia it can peel back edge metal and progressively lift the membrane behind it. The pre-season inspection should focus first on the roof edge: coping caps, drip edges, gravel stops, and the cleats and fasteners holding them. On adhered and mechanically attached single-ply systems, perimeter and corner fastening is denser by design, so any loosened fasteners or lifted terminations in those zones are a priority repair.
- Inspect all coping, fascia, and edge metal for loose fasteners, open joints, and movement.
- Check membrane terminations and termination bars at parapets and curbs for lifting or failed sealant.
- Verify that base flashings and counterflashings are tight and fully adhered.
- Confirm rooftop equipment, antennas, solar racking, and screen walls are secured and not pulling at the membrane.
- Remove or secure loose rooftop materials, scrap, and unsecured equipment that can become wind-borne debris.
Drainage and Water Management
Storm season concentrates a season's worth of rain into short, intense events, and a roof's ability to shed that water quickly is what keeps a heavy rain from becoming an interior loss. Drains and scuppers that are marginal in normal weather become liabilities under a downpour. Clearing every drain, confirming overflow scuppers are open, and addressing chronic ponding areas reduces the standing load that wind-driven rain can force under seams and flashings. On any roof where water already lingers, that low spot is where a storm will find its way in.
Wind-driven rain also defeats details that handle gravity water fine. Sealant joints, pipe boots, and counterflashing laps that look acceptable can leak when rain is pushed horizontally and upward. The inspection should test these details with that failure mode in mind, paying attention to the windward elevations and any spot where water could be driven under a lap rather than running over it.
Baseline Documentation Before the Storm
The most valuable thing an owner can do before storm season has nothing to do with repairs. It is establishing a dated condition baseline. When a storm hits and a claim follows, the central dispute with insurers is almost always whether damage is storm-related or pre-existing wear. A current, dated inspection report with photographs settles that argument in the owner's favor. Without it, an adjuster can attribute legitimate storm damage to age and deferred maintenance, and the burden falls on the owner to prove otherwise after the fact.
- Commission a dated, photographed condition assessment before the season begins.
- Record roof system type, age, and the location of any existing minor defects.
- Keep the warranty certificate, prior inspection reports, and maintenance records together and accessible.
- Note any recent repairs and the contractor and materials used, so post-storm work can be distinguished from old work.
A Response Plan You Can Execute Fast
When a roof is compromised mid-storm, the first 48 hours determine how large the loss becomes. Water that enters through a lifted edge or punctured membrane keeps spreading into insulation, deck, and the spaces below until it is stopped. Owners who have a response plan already in place, with a qualified roofing contractor on call, a method for emergency temporary protection, and a clear internal chain of authority to approve work, contain damage that an unprepared owner is still scrambling to address. Temporary dry-in measures should be done in a way that does not void the manufacturer warranty, which means using an approved contractor and approved methods even under time pressure.
The plan should name who inspects the roof immediately after the storm passes, who is authorized to engage the contractor, and how the damage will be documented as it is found. Photographs taken before any cleanup or temporary repair are critical, because they capture the storm's signature, which is what an adjuster needs to see.
After the Storm: Documenting and Claiming
Once the roof is stabilized, the work shifts to assessment and documentation. A thorough post-storm inspection should distinguish storm damage from pre-existing conditions, quantify the affected area, and tie the findings back to the pre-season baseline. Hail and wind leave identifiable patterns, and a report that describes them specifically supports a stronger claim than a general statement that the roof is damaged. For portfolio owners, capturing this consistently across affected buildings also informs capital decisions, since a storm often accelerates the replacement timeline for a system that was already near the end of its service life.
The throughline of storm readiness is that the cheap work happens before the storm and the expensive work happens after. Securing the edge, clearing the drains, and establishing a documented baseline cost little and consistently reduce both the physical loss and the friction of recovering it. We help owners build that readiness into their seasonal calendar so a storm becomes a managed event rather than an emergency.
One more discipline separates owners who recover well from those who do not: knowing their policy before the season, not after the loss. Wind and hail deductibles on commercial property are frequently calculated as a percentage of the insured value rather than a flat dollar amount, which can make the owner's share of a roof claim far larger than expected. Understanding that exposure in advance shapes the decision about how much to invest in hardening the roof and where to set the threshold for filing. Pairing that policy awareness with a current condition baseline and a rehearsed response plan is what turns storm season from a source of uncertainty into a set of manageable, mostly predictable decisions.