Alberta · Aluminum shingles
Aluminum shingles in Alberta
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 Alberta by our own company.
Reviewed by Scott Plumptree, Director of Marketing, The Interlock Group · Updated October 8, 2026
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
| 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 Alberta homes
Recent Alberta jobs, newest first. Tap a roof to see all of its photos.
Hunter Green Cedar Shingle · Sylvan Lake, AB · 2 photos
Tudor Brown Cedar Shingle · Grande Prairie, AB · 2 photos
Deep Charcoal Cedar Shingle · Drayton Valley, AB
Black Slate · Edmonton, AB · 2 photos
Black Slate · Calgary, AB · 3 photos
Deep Charcoal Cedar Shingle · Crossfield, AB
Colonial Brown Cedar Shingle · Three Hills, AB
Deep Charcoal Slate · Calgary, AB · 4 photos
Profiles and colours
Slate is by far the most popular profile in Alberta. Cedar Shingle and Shake give a wood look without rot, splitting or the fire risk FireSmart Alberta warns about with wood shakes; Mediterranean Tile suits Spanish and Italianate homes. Nine colours: Solid Copper, Copper Penny, Hunter Green, Black, Deep Charcoal, Musket Grey, Tile Red, Colonial Brown and Tudor Brown.
On Alberta homes in our job book: Slate 108, Cedar Shingle 13, Shake 4 and Mediterranean Tile 6, along with 22 roofs in the legacy Interlock Shingle profile that came before them.
Aluminum shingles in an Alberta winter
Snow
Aluminum sheds snow. Snow guards go where a slide would land on people, decks or cars, planned at the estimate.
Chinooks and freeze-thaw
The panel absorbs no water, so the freeze-thaw that follows a chinook has nothing to split or loosen, unlike asphalt granules or wood.
Strong sun
Alberta gets a lot of clear-sky sun, and it is strong at elevation. The Alunar® five-layer finish carries a 30 Year Alunar® Coating Warranty.
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.
Aluminum shingles and hail
Interlock's Slate, Cedar Shingle, Shake and Mediterranean Tile aluminum panels carry a UL 2218 Class 4 impact rating, listed by Intertek under Delta Building Products.
UL 2218 drops steel balls of increasing size on a roof sample; Class 4 is the highest class in the test. It tells you the panel resisted cracking in that test, not that hail can't mark it: large hail can dent aluminum, dents are treated as cosmetic, and the Guardian Lifetime Limited Material Warranty excludes hail larger than 38 mm (1.5 in). If your insurer asks for the rating, we give you the listing details.
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.
Do aluminum shingles dent in hail?
They can. Interlock's Slate, Cedar Shingle, Shake and Mediterranean Tile aluminum panels carry a UL 2218 Class 4 impact rating, listed by Intertek under Delta Building Products. The rating means the panels passed the test without cracking, not that large hail can't dent them. The Guardian warranty excludes hail larger than 38 mm (1.5 in), and hail damage is a home insurance matter.
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. Both 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 Alberta?
Interlock Metal Roofing (Alberta) Ltd. installs Interlock® aluminum shingles across Alberta, with 3,542 roofs completed since 1999, from one office in Calgary that serves Calgary and Edmonton. Call (587) 317-6517.
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.
Sources
- Interlock Roofing: aluminum shingles, technical specifications
- J.R. Davis, "Aluminum and Aluminum Alloys", Alloying: Understanding the Basics, ASM International (2001)
- FireSmart Alberta: roof fact sheet
- Guardian Lifetime Limited Material Warranty (full terms)
Product specifications are the manufacturer's (Interlock Roofing). Install counts are from our own job book. Reviewed by Scott Plumptree, October 8, 2026.
Get aluminum shingles priced.
A fixed price in writing after one visit, at your home or on Zoom. Interlock Metal Roofing (Alberta) Ltd. · 210, 3750 46 Ave SE, Calgary, AB T2B 0L1
