Cedar shake roof replacement, Ontario

Why cedar roofs wear out in Ontario

Cedar takes on water. Through an Ontario winter that water freezes and thaws in the wood again and again, and with summer sun and humidity the shakes split, cup, curl and rot, and need cleaning and re-treating to last. Aluminum absorbs nothing and cannot rot, so there is nothing in the panel for freeze-thaw to work on.

A cedar roof always comes off before an Interlock® roof goes on. That tear-off is in the written price from the start.

Keep the look: Shake and Cedar Shingle profiles

Interlock's Shake profile has deep, hand-split shadow lines; the Cedar Shingle profile has the flatter look of a sawn cedar roof. Both are aluminum, lock on all four sides with the fasteners concealed, and weigh roughly 2 to 3.5 kg per square metre depending on profile.

At least 338 of the roofs in our job book in Ontario are Shake or Cedar Shingle profiles.

Fire and cedar

Class A Fire Rated Available, as a complete assembly: two layers of GAF VersaShield® over 12 mm (15/32-inch) plywood, per ASTM E108 (CAN/ULC-S107 is the Canadian counterpart). The rating belongs to the assembly, not to the panel alone, and aluminum itself does not ignite. That matters most for a house or cottage beside the forest.