As winter sets in across Missouri and Illinois, commercial flat and low-slope roofs face a unique set of challenges: heavy snow loads, freeze-thaw cycles, ice accumulation around roof edges, and changes in building temperature that all put added stress on the roof system. At Jewett Roofing, we’ve installed and serviced hundreds of roofs and seen first‐hand how these conditions impact performance and longevity.
If you’ve invested in a high-performance membrane system such as Duro‑Last PVC, you may already know its reputation for durability—but this season is a good time to dig into exactly why it holds up so well when snow and ice settle in. And if you’re evaluating new roofing systems, this piece will help you understand features that matter most in winter.
Engineered for Extreme Cold and Heavy Loads
One of the reasons Duro-Last stands out is its reinforced PVC membrane, fabricated off-site into large, custom-sized panels that reduce the number of on-roof seams. Fewer seams mean fewer potential weak points when temperatures drop and conditions become harsh.
Additionally, Duro-Last’s heat‐welded seams (rather than adhesives) maintain strong bonding even when ambient temperatures are low. That matters because when cold weather hits, adhesives can become brittle, lose flexibility, or fail to hold up under movement. With welded seams, the integrity of the system remains intact.
Snow and ice bring two related stresses: extra weight and freeze‐thaw contraction/expansion. The membrane’s flexibility lets it move without cracking or splitting when the roof deck shifts or when loads change rapidly during winter. In our experience, that adds resilience compared with some older membranes.
Performance When Snow and Ice Meet the Roof Edge
Winter roof issues often begin at edges, drains, penetrations, and flashing—where snow melts, refreezes, or accumulates. Some of the most common winter problems we see:
Melted snow traveling from warmer attic space, pooling at roof drains or eaves, and then freezing.
Ice forming at the building edge or gutter line, backing up water under membranes or around terminations.
Heavy snow sliding off pitched roof sections, accumulating on lower flat sections or roof edges.
Freeze/thaw cycles cracking or breaking down membranes or flashing components.
With Duro-Last’s membrane and system design, these risks are muted. Its strong membrane resists cracking, its custom-fabricated fit reduces lifted seams, and its reflective surface can help moderate roof surface temperature. While no roof is immune to extreme weather, a system designed with winter in mind gives you a leg up.
Reduced Maintenance, Fewer Surprises
From our perspective at Jewett Roofing, one of the biggest benefits of a quality system like Duro-Last in winter is the predictability. When fewer leaks occur because seams hold up, flashing stays tight, and the membrane remains flexible, you spend less time chasing problems—and more time focusing on your facility operations.
In practical terms: fewer emergency repairs during or after a storm, fewer interior disruptions from roof-related leaks, and potentially lower long‐term life-cycle costs because the membrane isn’t suffering silent stress.
For building owners, that means peace of mind during winter, when weather can change fast and conditions can worsen quietly. A roof system built for winter performance is an investment in operational continuity and protection of your assets.
Partnering with the Right Roofing Team Matters
Even the best membrane system performs at its best only when properly installed, maintained, and inspected. At Jewett Roofing we bring decades of experience with Duro-Last and other high-performance PVC roofing systems, ensuring that the right materials, details, and craftsmanship all align.
Here are few suggestions to get the most from your system this winter:
Schedule a winter readiness inspection (late autumn or early winter) to check drains, ponding potential, flashing terminations, seams, and membrane condition.
Clear gutters, scuppers, and drains of debris to ensure proper drainage and avoid frozen back-ups.
Monitor snow accumulation and arrange safe snow removal when needed, especially around rooftop equipment, drains, and edges.
Keep an ongoing maintenance plan in place—especially for flat or low-slope commercial roofs—so small issues don’t escalate during freeze-thaw cycles.
Winter doesn’t wait. With snow, ice, changing temperature cycles, and heavy loads, your roof is tested more often and more intensely during this season. Choosing a system like Duro-Last, and partnering with a team experienced in commercial roofing like Jewett Roofing, gives you the durability and peace of mind needed to protect your building through winter and beyond.
If you’d like to discuss how your roof performs in cold weather, or schedule a winter readiness inspection, contact us today.
