Metal Roof Snow Load Ontario — ROOFNOW™ Guide

Ontario winters create constant freeze–thaw cycles that push roofing materials to their limits. Asphalt shingles contract and expand repeatedly, causing cracks and water penetration. Armadura® Metal Roofing resists these stresses through engineered steel construction.

How Freeze–Thaw Cycles Damage Asphalt

When meltwater seeps under asphalt shingles and refreezes, it expands. This expansion pries shingles upward, breaking adhesives and damaging the roof deck. Repeating this cycle dozens of times each winter accelerates roof failure.

Why Armadura® Survives Freeze–Thaw Conditions

G90 galvanized steel does not absorb moisture. This prevents freeze–thaw expansion forces from affecting the material. Armadura®’s interlocking design also blocks water infiltration entirely.

ROOFNOW™ Recommendation

To learn more about winter roofing science, explore Roof Smart. Roof Once..

Learn about Armadura® roofing systems at ROOFNOW™ Armadura® Metal Roofing.