Michigan’s climate is beautiful—but it can be brutal on your commercial roof. With frigid winters, heavy snow, sudden temperature swings, spring rainstorms, and strong seasonal winds, roofing systems in the Great Lakes region are subjected to a constant barrage of challenges year-round.
For property owners and facility managers, understanding how Michigan weather affects commercial roofs is crucial to making informed material choices and preventing costly repairs.
Below we’ll explore three of the biggest weather-related challenges—freeze-thaw cycles, snow loads, and wind uplift—and how to choose roofing systems that can withstand them.
Freeze-Thaw Cycles: Michigan’s Hidden Roof Killer
One of the most damaging weather patterns in Michigan is the repeated freeze-thaw cycle that occurs throughout late fall, winter, and early spring. During these cycles, daytime temperatures rise above freezing, melting accumulated snow and ice. When temperatures drop overnight, the moisture refreezes.
Why it’s a problem:
● Water intrusion: When snowmelt seeps into tiny cracks or seams in the roof membrane and then refreezes, it expands, causing those gaps to widen.
● Accelerated wear: Repeated freezing and thawing stresses flashing, seams, and roofing adhesives.
● Membrane degradation: Over time, this process can break down even high-performance materials if not maintained properly.
What to look for:
● Bubbles or blisters in single-ply membranes (indicating trapped moisture)
● Cracks or splits along seams
● Water staining or pooling that reappears after every melt
How to protect your roof:
● Choose roofing systems with strong seam integrity and materials that can flex without cracking.
● Consider fully adhered or mechanically attached systems that resist water penetration more effectively than ballasted systems.
● Schedule regular inspections during seasonal transitions to catch freeze-thaw damage early.
Snow Loads: Flat Roofs Under Pressure
Heavy snow is a part of life in Michigan, and commercial roofs—especially flat or low-slope systems—must be designed to bear the load. Unlike pitched roofs that shed snow naturally, flat roofs can accumulate snow quickly, and that weight adds up fast.
Why it’s a problem:
● Structural strain: Wet snow can weigh 15 to 30 pounds per cubic foot. A large commercial roof can carry thousands of pounds in a single storm.
● Ice dams: Snow can create ice dams, which trap water and force it under the membrane.
● Drainage issues: Snowmelt must be directed away from the roof promptly, or it can pool and refreeze.
What to look for:
● Sagging sections of the roof or bowing ceiling tiles
● Overflowing or frozen drains
● Large icicles are forming along the building edge
How to protect your roof:
● Use roofing systems that incorporate high-load insulation and structural support rated for Michigan’s snow conditions.
● Clear roof drains and scuppers before winter hits.
● Choose materials with UV and thermal resistance to handle snowmelt cycling and insulation retention.
Wind Uplift: More Than Just a Tornado Concern
Michigan isn’t just cold—it’s windy, too. Commercial roofs in this region face frequent gusts, especially in open areas or near the lakes. Wind uplift happens when wind gets underneath roofing materials, especially at edges or corners, and pulls them upward, potentially ripping them loose.
Why it’s a problem:
● Edge failure: Once edge flashing lifts, wind can get underneath and start peeling back membranes.
● Loss of roof sections: In extreme cases, high wind events can lift entire panels or membrane sections.
● Water intrusion: Even minor wind-related damage can expose underlayment or insulation to moisture.
What to look for:
● Loose or flapping membrane edges
● Detached flashing or coping
● Lifted ballast or roofing panels
How to protect your roof:
● Choose roofing systems that are rated for high wind uplift resistance, particularly in edge and corner zones.
● Use mechanically fastened systems with perimeter enhancements.
● Ensure your installer follows ANSI/SPRI ES-1 standards for edge metal systems.
Prepare your Commercial Roof for the Season
Michigan weather puts your commercial roof through a year-round stress test. Freeze-thaw cycles, snow accumulation, and powerful wind events all have the potential to cause serious damage if your roofing system isn’t built to handle them. The best protection is not just in the materials you choose but also in how they’re installed and maintained.
At MacDermott Roofing, we specialize in commercial roofing solutions that deliver long-term durability, energy efficiency, and lower lifecycle costs. For over 50 years, we’ve helped Metro Detroit facilities protect their roofing assets and stay warranty compliant. Schedule a professional roof assessment today.