Metal Roof Snow Load Ontario — ROOFNOW™ Guide

Understanding snow load is essential for homeowners in Ontario, especially when choosing between temporary asphalt shingles and permanent metal roofing. The weight of accumulated snow can stress a roof system, affect attic ventilation, and lead to long-term structural problems if the system is not engineered properly.

How Snow Load Affects Ontario Homes

Snow load can increase significantly in Ontario because of lake-effect storms, prolonged freezing temperatures, and sudden freeze–thaw cycles. Asphalt shingles absorb water and become heavier under snow, increasing structural load. Armadura® Steel Roofing maintains consistent weight because G90 galvanized steel does not absorb moisture. For more roofing science articles, visit the ROOFNOW™ Knowledge Center.

What Is SMP Crinkle Finish?

SMP Crinkle Finish is an advanced coating applied to Armadura® metal panels. Unlike smooth coatings, the textured micro-crinkle surface diffuses sunlight, enhances colour retention, and increases scratch resistance. This finish is engineered for harsh Canadian climates where winter constantly challenges roofing surfaces.

Why SMP Crinkle Finish Performs Better in Winter

During Ontario winters, ice, snow, and wind place exceptional strain on roofing materials. SMP Crinkle Finish provides:

• Enhanced durability: The textured surface withstands friction from sliding snow.
• Improved traction: Controls sudden snow release by allowing predictable shedding.
• Superior UV protection: Essential during sunny winter days.
• Fade resistance: Prevents colour degradation compared to traditional metal coatings.

These advantages help Armadura® panels survive decades of winter wear without peeling or fading.

Snow-Shedding Benefits of the Crinkle Texture

The crinkle texture promotes natural snow shedding while preventing the “ice avalanche” effect common with smooth metal roofs. Snow releases gradually and evenly, reducing stress on rafters and trusses.

Why ROOFNOW™ Recommends Armadura® With SMP Crinkle Finish

ROOFNOW™ installs Armadura® Metal Roofing because its coating system is specifically engineered for Canadian winters. The blend of G90 steel and SMP Crinkle Finish creates a roofing system that resists corrosion, shedding inefficiencies, and weather-induced surface damage.

For deeper roofing science insights, explore Roof Smart. Roof Once.

Learn more about Armadura® installations at ROOFNOW™ Armadura® Metal Roofing.