Ontario · Aluminum shingles

Aluminum shingles in Ontario

Aluminum shingles are stamped aluminum roofing panels that don't rust, because there is no steel inside them. Interlock® aluminum shingles interlock on all four sides with the fasteners concealed, are made in Canada, and are installed across Ontario by our own company.

Reviewed by Scott Plumptree, Director of Marketing, The Interlock Group · Updated October 7, 2026

Get a free quote (416) 620-2174

Thickness

0.019 in (0.483 mm)

Aluminum alloy per ASTM B209 (manufacturer).

Weight

Roughly 2 to 3.5 kg/m²

A fraction of concrete tile or natural slate.

Finish

30 Year Alunar® Coating Warranty

Five-layer fluorocarbon finish.

What makes an aluminum shingle different

An aluminum shingle is a stamped aluminum panel with a baked finish. Unlike a steel shingle, there is no steel core under the finish, so there is nothing to rust if the finish is scratched or cut. The exposed aluminum forms an oxide film that blocks further oxidation (ASM International).

Interlock® aluminum shingles lock to each other on all four sides. The fasteners sit under the course above, out of the weather, so the roof has no exposed screw heads and no rubber washers to age.

Specifications

Interlock aluminum shingle specifications (manufacturer)
Item	Specification
Base metal	Aluminum alloy per ASTM B209: 3105-H24 (Slate, Cedar Shingle); 3003-H24 (Shake, Mediterranean Tile, Standing Seam)
Thickness	0.019 in (0.483 mm) nominal base thickness
Weight	Roughly 2 to 3.5 kg per square metre, depending on profile
Finish	Alunar® five-layer fluorocarbon (PVDF) coating; 30 Year Alunar® Coating Warranty
Wind	Warranted to 193 km/h (120 mph) installed to manufacturer specification
Fire	Class A Fire Rated Available, as a complete assembly (two layers of GAF VersaShield® over 12 mm (15/32-inch) plywood, per ASTM E108)
Minimum slope	3/12
Material warranty	Guardian Lifetime Limited Material Warranty: material and finish, for as long as the original purchaser owns the home, transferable once
Made	In Canada, by Interlock Roofing, Delta, BC

Source: Interlock Roofing technical specifications. Read the full warranty terms before you sign.

Aluminum shingles on Ontario homes

Recent Ontario jobs, newest first. Tap a roof to see all of its photos.

See every Ontario roof in the gallery

Profiles and colours

Slate is the most popular profile. Cedar Shingle and Shake give a wood look without rot or splitting; Mediterranean Tile suits Spanish and Italianate homes, and Standing Seam a modern or farmhouse roof. Nine colours: Solid Copper, Copper Penny, Hunter Green, Black, Deep Charcoal, Musket Grey, Tile Red, Colonial Brown and Tudor Brown.

On Ontario homes in our job book: Slate 2,659, Cedar Shingle 280, Shake 58, Mediterranean Tile 142 and Standing Seam 11, along with 3,211 roofs in the Original Shingle profile that came before them.

Aluminum shingles in an Ontario winter

Snow

Aluminum sheds snow. Snow guards go where a slide would land on people, decks or cars, planned at the estimate.

Freeze-thaw

The panel absorbs no water, so freeze-thaw has nothing to split or loosen, unlike asphalt granules or wood.

Road salt and lake air

With no steel inside, salt spray near a busy road, a garage or a lake has no steel core to rust.

Ice dams

No roof stops ice dams on its own: they come from heat loss and ventilation, and ice damming is a stated exclusion of the material warranty. We look at your attic with you.

Questions, answered

What are aluminum shingles?

Aluminum shingles are roofing panels stamped from aluminum sheet and finished with a baked coating, made to look like slate, cedar shingle, shake or tile. Interlock® aluminum shingles interlock on all four sides with concealed fasteners.

Do aluminum shingles rust?

No. Aluminum forms a thin oxide film that blocks further oxidation, and there is no steel inside an aluminum shingle to rust.

Are aluminum shingles better than steel shingles?

Aluminum doesn't rust and is about one-third the density of steel. Steel shingles usually cost less up front and depend on their zinc or aluminum-zinc coating to keep from rusting. Aluminum can dent under large hail.

How thick are Interlock aluminum shingles?

0.019 in (0.483 mm) nominal base thickness, aluminum alloy per ASTM B209, according to the manufacturer's specification.

Where can I get aluminum shingles installed in Ontario?

Interlock Metal Roofing (Ontario) Ltd. installs Interlock® aluminum shingles across Ontario, with 8,261 roofs completed since 1998. Call (416) 620-2174.

Can aluminum shingles be installed over asphalt?

A single layer of asphalt can be roofed over only if our inspection finds it suitable. Cedar shakes, concrete tile and natural slate always come off first.

What colours do aluminum shingles come in?

Interlock® offers nine: Solid Copper, Copper Penny, Hunter Green, Black, Deep Charcoal, Musket Grey, Tile Red, Colonial Brown and Tudor Brown, with a 30 Year Alunar® Coating Warranty on the finish.

Sources

Product specifications are the manufacturer's (Interlock Roofing). Install counts are from our own job book. Reviewed by Scott Plumptree, October 7, 2026.

Get aluminum shingles priced.

A fixed price in writing after one visit, at your home or on Zoom. Interlock Metal Roofing (Ontario) Ltd. · 2800 Argentia Rd #5, Mississauga, ON L5N 8L2