Metal Roof Snow Load Ontario — ROOFNOW™ Guide

Ontario’s long winters place continuous strain on roofing systems. Heavy snow, ice dams, and freeze–thaw cycles accelerate the deterioration of asphalt shingles. Armadura® Metal Roofing, made from G90 galvanized steel, provides unmatched protection for homeowners seeking long-term durability.

How Snow Load Affects Ontario Homes

Snow load refers to the downward force created by accumulated snow. Asphalt shingles absorb moisture, increasing weight and weakening structural components. Armadura® Metal Roofing remains lightweight and water-resistant, ensuring consistent structural performance. Learn more roofing science at the ROOFNOW™ Knowledge Center.

What Makes G90 Galvanized Steel Superior?

G90 galvanized steel contains a robust zinc coating that protects the underlying metal from corrosion. This coating is essential for Canadian climates, where freeze–thaw cycles trap moisture against the roof surface.

Armadura® panels use full G90 steel, offering:

Exceptional corrosion resistance
Long-term colour stability with SMP Crinkle Finish
Rigid structural performance
Moisture protection even under standing snow

Freeze–Thaw Durability

Every Ontario winter brings repeated cycles of melting and refreezing. Asphalt shingles crack under this stress. G90 steel retains its shape and protective coating, preventing water from reaching the roof deck.

Why G90 Matters for Ontario Homeowners

Local climates in Barrie, Sudbury, Ottawa, and Muskoka regularly experience extreme winter pressures. G90 steel stands up to these conditions far better than thinner, imported metals. Armadura® is engineered exclusively for the Canadian environment.

ROOFNOW™ Recommends G90 Steel for Winter Roofing

ROOFNOW™ installs premium metal systems designed to withstand Ontario’s toughest seasons. Proper ventilation, air sealing, and roof engineering complete the winter-ready solution.

For deeper insights into roofing science, explore the book Roof Smart. Roof Once..

Learn more or request service at ROOFNOW™ Armadura® Metal Roofing.