Winter in the Ohio Valley doesn't bring the sustained snow load that roofs further north are built for, but it brings something just as damaging in its own way: episodic ice storms and repeated freeze-thaw cycles that stress drainage points, seams, and flashing on commercial roofs across the tri-state. A roof that handles a normal Evansville winter fine can still take real damage from one bad ice event, and because that damage tends to be quieter than a torn membrane from a windstorm, it's easy for it to go undocumented until a leak shows up months later.
On the flat and low-slope roofs common across Evansville's commercial and manufacturing stock, ice damage rarely looks like the icicle-and-ice-dam pattern people associate with sloped residential roofs. Instead, water pools near drains or scuppers, refreezes overnight, and backs up against the low point the next time it thaws. That repeated cycle stresses the membrane seams and flashing right around the drain, and on older built-up or modified bitumen sections downtown, it can work granules loose or open small seam separations that widen with each freeze-thaw pass through the season.
Most winters here don't test a roof's structural snow load capacity, but an unusually heavy or wet accumulation occasionally does, particularly on older built-up roofs where drainage is already sluggish and ponding was a pre-existing issue before the snow arrived. We check deck condition and drainage function together after a significant snow event, since the two problems tend to compound each other, a roof that already holds water drains even more slowly once snow starts melting into it.
Ice and freeze-thaw damage doesn't always announce itself the way a storm-torn membrane does. A small seam separation near a drain can leak intermittently for weeks before it's obviously a roof problem rather than a plumbing one, and by the time it's diagnosed, tying the damage back to a specific ice event can be harder. Getting a roof inspected soon after a significant ice storm, rather than waiting for an active leak, produces a cleaner and more defensible documentation record.
We walk the roof with your adjuster when requested, pointing out drainage-point damage and explaining how freeze-thaw stress differs from ordinary membrane aging. We're your roofing contractor, not a public adjuster, we document and substantiate the roof damage so you and your adjuster work from an accurate scope, not a guess about how the winter event affected the roof.
Because ice damage tends to repeat at the same low points year after year, a drain or scupper that backed up during one ice storm is likely to do it again during the next one unless the underlying slope or drain capacity issue gets addressed. When we document winter damage, we also note whether the drainage problem itself is a one-time event or a recurring condition, since that distinction matters for both the current claim and for preventing a similar claim next winter.
Winter roof damage on a commercial building sometimes gets reported first as an interior problem, a stained ceiling tile near a mechanical room, a damp wall below a parapet, before anyone connects it to the roof above. We check the roof directly above any interior water sign reported during winter months, since tracing that path early keeps a claim focused on the actual point of entry instead of chasing symptoms indoors.
It can. The region doesn't see snow load the way northern states do, but episodic ice storms and repeated freeze-thaw cycles cause real damage to aging drains, flashing, and membrane seams on commercial roofs.
Rather than the classic sloped-roof ice dam, flat roofs more often show ponded water that refreezes at drains or scuppers, backing up and stressing membrane seams and flashing details around those low points.
On older built-up or modified bitumen roofs with reduced load capacity, an unusually heavy or wet snow accumulation can stress the deck and membrane, especially where drainage is already sluggish.
Yes, when it's practical to do so. Ice-blocked drains and scuppers are one of the most common causes of standing water damage on Evansville's flat commercial roofs during winter.
Ice and freeze-thaw damage tends to be located at drainage points and seams rather than distributed across the whole field, so documentation focuses closely on those low points and their surrounding membrane condition.