Winter is one of the hardest stress tests a commercial roof will ever face, especially here in Wisconsin.
Multiple issues can pile up at once—snow, ice, wind, and brutal temperature swings—so catching them early is the difference between a dry building and an expensive mess.
Here’s a list of 6 problems your roof may have in the winter months and how to resolve them:
1. Excess Snow Load and Drifting ❄️
When snow piles up, especially on flat and low-slope roofs, weight becomes a major concern.
Heavy, wet snow or wind-drifted snowbanks near parapet walls, rooftop units, and valleys can overload structural members and cause sagging or—even worse—partial collapse.
To reduce risk, maintenance teams should:
- Monitor snow depth in multiple areas, not just the center of the roof. Wind often drifts snow into deep “banks” against walls, curbs, and rooftop equipment.
- Remove snow when accumulations or drifts become excessive. Either:
- DIY and avoid scrapping or gouging the roof membrane which could cause additional damage
- Or, schedule a trained commercial roofing crew to remove the snow.
- Avoid pushing snow into large piles near drains, scuppers, or weak areas; instead, distribute the snow to keep the loads balanced and avoid blocking drainage.
2. Ice Dams and Frozen Drains 🧊
Ice dams and frozen drains often cause water to enter the building.
When snow melts and refreezes around drains, scuppers, and edges, water (from more snow melting) has nowhere to go and begins to pond behind the ice. That standing water seeks a way into the building through seams, cracks, punctures, or flashing gaps.
To avoid and fix this:
- Keep drains and scuppers as clear as possible in the fall so they’re ready before winter hits. Screens, baskets, and routine debris checks help a lot.
- Watch for rings of ice around drains and low spots; when you see them, call in a commercial roofing crew that uses low-impact, roof-safe ice removal methods (like steam)—not hammers or chisels which may damage the roof.
- Consider long-term improvements: install better insulation or spray foam to reduce heat loss and improve drainage so meltwater leaves the roof instead of refreezing in place.
3. Freeze–Thaw Damage and Roof Stress 🌡️
Winter’s freeze–thaw cycles are brutal on commercial roofing materials. Here’s why:
- Warm weather melts the snow
- Water seeps into tiny cracks or lap joints
- Water freezes and expands when the temperature drops
- Defects are widened by the frozen water
Simultaneously, temperature swings also make roofing materials expand and contract which stresses (or pulls apart) seams and flashing and can also cause cracks.
You can limit this type of damage by:
- Strengthen known problem areas—open seams, cracked caulk, loose flashing, missing bolts—before winter so less water can sneak in through vulnerable spots.
- Use restoration systems (like spray-applied coatings or foam) that create a continuous, flexible, watertight surface, which can better tolerate movement and temperature swings.
4. Wind, Uplift, and Loose Components 💨
Winter storms often bring wind along with the snow. Strong gusts can damage the edges and corners of a roof, peeling back membranes or lifting metal panels.
Loose flashing, open laps, and failing fasteners are weak points that wind loves to exploit.
Key prevention and repair steps include:
- Check perimeter edges, corners, and fasteners before winter to ensure all is secure.
- Inspect after strong winds for flapping membrane, loose panels, missing fasteners, and displaced insulation, then addressing those quickly.
5. Hidden Leaks and Wet Insulation 💦
Snow and ice often mask where water is actually getting in, and leaks might show up as slow ceiling stains or intermittent drips that disappear when the weather changes.
Over time, moisture grows mold, soaks insulation, drops the insulation’s R‑value (aka heat resistance or ability to do its job), and drives up heating bills (and repair bills).
Smart ways to stay ahead of this:
- Track when and where leaks show up—only during thaws, only after storms, near specific rooftop units—so a roofer can trace them back to likely sources.
- Check suspected areas in warmer weather for wet insulation and trapped moisture, then dry out, repair, restore, or replace damaged materials as needed.
6. Safety Hazards for People and Operations ⚠️
Icicles, falling ice, and leaks quickly become safety and operational headaches.
Icicles near entrances, loading docks, or customer walkways are a liability concern, and roof leaks near electrical panels or production areas can force shutdowns.
To protect people and operations:
- Regularly check for icicles and overhanging ice above doors, docks, and sidewalks, and reroute foot traffic if needed until it’s removed.
- Mark any leaks that show up near critical infrastructure (IT rooms, switchgear, production lines) as priority repairs.
How SR Commercial Roofing Can Help ✅
For maintenance managers, the goal isn’t to turn your team into roofers, but to know when to step in and when to call in help. At SR Commercial Roofing, we can:
- Perform inspections anytime in the year to identify vulnerabilities before they become full-blown failures.
- Provide safe snow and ice removal services that protect both the roof and your people.
- Recommend restoration options—like spray foam and high-performance coatings—that improve insulation, waterproofing, and overall roof performance for many winters to come.
If you’re within a few hours of Sparta, WI and dealing with winter roof headaches—or want to avoid them next season—it’s worth reaching out for a no-obligation roof inspection so that you know how your roof is holding up.
