Documenting Roof Damage After a Valley Snow or Ice Event
Heavy snow and ice on a commercial roof isn't a routine event in the southern Willamette Valley the way it is east of the Cascades, and that's exactly what makes it a problem when it happens. Eugene's commercial roof stock is generally built and maintained for a wet, mild climate, not for sustained snow load or ice damming, so when a heavier winter event does move through the valley, the damage can be more significant than the same event would cause in a snow-country market. We've documented that kind of damage on a range of Eugene commercial buildings, and getting an accurate record matters more, not less, because these events are infrequent enough that owners and even some adjusters aren't always sure what they're looking at.
Why Snow and Ice Hit Valley Roofs Differently
A roof designed for the region's typical rainfall load, drainage systems sized for water rather than sustained snow accumulation, low-slope membrane systems without the ice-and-water protections common in colder climates, isn't necessarily built to shed or support an unusual snow or ice event the way a roof in a snowier region would be. Recent winters have brought a few heavier snow and ice events to the valley than the area typically sees, and roofs that handled decades of rain without issue can show real distress under load or freeze-thaw cycling they were never designed around.
What We Document After Snow or Ice Damage
We inspect for structural deflection or stress at long-span areas, ice damming at parapets, scuppers, and roof drains where meltwater refreezes and backs up under the membrane, and membrane damage where ice has expanded in a seam or penetration. On roofs with rooftop equipment, we also check curb flashing, since ice buildup around units is a common point where meltwater finds its way into the building. Photos are taken during the event where it's safe to access the roof, and again during thaw, since some of the most telling damage, ice-dammed water backing up under a membrane, only becomes visible once conditions warm.
We keep our documentation general and specific to what we actually observe on your roof rather than relying on claims about how unusual the event was regionally. Adjusters are more responsive to a clear, well-documented account of the physical damage than a narrative about the weather.
Ice Damming and Drainage on Low-Slope Roofs
Ice damming is a particular risk on the low-slope membrane roofs common across Eugene's commercial buildings, where meltwater has nowhere to run off quickly and can refreeze at drains, scuppers, and parapet walls overnight. That backed-up water can sit against a membrane seam or penetration for days during a cold snap, well past the point where a sloped residential roof would have shed the same moisture. We document the extent of ice accumulation at drainage points specifically, since that's often where the eventual leak traces back to.
Working With Your Adjuster on a Snow or Ice Claim
When a client wants us there, we walk the roof with the adjuster once conditions allow safe access, pointing out the specific damage and explaining how it relates to the snow or ice event. Because these events are less common here, we find it helps to walk through the mechanism of damage in more detail than we might on a routine wind claim, moisture doesn't always show up where the ice sat, and it can take an adjuster unfamiliar with valley building stock a closer look to connect the two.
We're your roofing contractor, not a public adjuster; we document and verify the roof damage so you and your adjuster are working from the same accurate scope, not a guess about what an unusual winter event did to the roof.
Snow and Ice Damage Claim Questions
Does my commercial policy cover snow or ice damage?
Most commercial property policies cover sudden damage from snow or ice load, though terms vary by insurer. We'd recommend confirming the specific language in your policy with your agent, since this peril comes up infrequently enough in this region that some owners aren't sure how their policy treats it.
How is ice dam damage different from a normal roof leak?
Ice damming happens when meltwater refreezes at a drainage point and backs up under the membrane or roofing material, sometimes traveling several feet from where the ice actually formed before it shows up as an interior leak. We trace the water path back to the ice-affected area during our inspection.
Should I wait until the snow melts to call for an inspection?
If it's safe to access the roof, documenting conditions during the event is valuable, but a lot of the clearest evidence of ice dam damage shows up during thaw. We typically recommend inspection both during and shortly after the event when conditions allow.
Can heavy snow cause structural damage on a low-slope commercial roof?
It can, particularly on longer-span roof sections not designed for sustained load. We check for deflection and stress signs as part of any post-snow inspection, since that's a different category of damage than a membrane or drainage issue.
Will you handle the claim process for me?
No, filing and managing the claim is between you and your insurer. We provide the inspection documentation and repair scope, and can walk the roof with your adjuster if you'd like us involved.