British Columbia · Aluminum shingles
Aluminum shingles in BC
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 in Delta, BC, and are installed across British Columbia by our own company.
Reviewed by Scott Plumptree, Director of Marketing, The Interlock Group · Updated October 8, 2026
Consultations on Zoom or at your home. Book a Zoom consultation
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 in BC
Recent Interlock® roofs installed by our own BC company, in Richmond first, then elsewhere in BC. Tap a roof to see all of its photos.
Deep Charcoal Slate · Richmond, BC · 4 photos
Deep Charcoal Slate · Richmond, BC · 7 photos
Deep Charcoal Slate · Richmond, BC · 2 photos
Musket Grey Shake · Summerland, BC
Deep Charcoal Slate · Anglemont, BC
Black Slate · Sooke, BC · 5 photos
Deep Charcoal Shake · Whistler, BC
Deep Charcoal Slate · Nanoose Bay, BC
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 West Coast contemporary roof. Colour samples come to the consultation, or we show them on Zoom.
On homes across British Columbia in our job book: Slate 1,095, Cedar Shingle 458, Shake 325, Mediterranean Tile 171, Standing Seam 116.
Aluminum shingles in BC
An island city one metre above the sea
The City of Richmond says it sits at an average of 1 metre above sea level, behind 49 km of dikes that hold back the Salish Sea and the Fraser River. Homes here live with damp sea air. Aluminum contains no iron, so it cannot rust; it forms its own protective oxide layer instead, wherever the house sits on the island.
Storm winds off the Strait of Georgia
The Strait of Georgia lies along Richmond's west side, and the City's flood planning deals with coastal storm surges: high water from storm winds and waves combined with high tides. The same storms push hard against roofs. Interlock® roofs are warranted for wind to 193 km/h (120 mph), installed to manufacturer specification, with every panel locked to the next.
Drier than Vancouver, still wet
Sitting farther from the mountains, Richmond gets about 30% less rain than neighbouring Vancouver. The Richmond Nature Park station still averages 1,262.4 mm of precipitation a year, falling on 183.8 days (1981–2010 climate normals), and the cooler months are very cloudy. A roof dries slowly under that cloud; aluminum gives moss nothing to grow in.
Richmond's single-detached houses
Apartments are Richmond's most common type of home, but the city also has 24,435 single-detached houses, and its high water table means very few of them have basements. We roof houses with a slope of 3/12 or steeper, replacing asphalt, cedar and tile with interlocking aluminum that weighs roughly 2 to 3.5 kg per m².
Richmond 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, which is why they suit homes near salt water.
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 BC?
Interlock Metal Roofing (BC) Ltd. installs Interlock® aluminum shingles across British Columbia, with 68 roofs completed. The panels are made in Delta, BC. Call (604) 210-3850 or book a consultation on Zoom.
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.
Do aluminum shingles help with moss?
Aluminum absorbs no water and cannot rot, so moss has nothing to root into the way it does in cedar or between asphalt granules. Needles and leaves still collect in valleys and gutters on a shaded roof, so keep those clear.
Sources for this Richmond guide
- Interlock Roofing: aluminum shingles, technical specifications
- J.R. Davis, "Aluminum and Aluminum Alloys", Alloying: Understanding the Basics, ASM International (2001)
- 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, on Zoom or at your home. Most BC homeowners choose Zoom. Interlock Metal Roofing (BC) Ltd. · 9969 River Way, Delta, BC V4G 1M8
