The Gulf Islands · Aluminum roofing · Made in Canada
Aluminum roofing on the Gulf Islands
We install Interlock® aluminum roofs on homes, cabins and strata complexes across the Gulf Islands: interlocking panels that don't rust, locked on four sides with the fasteners out of the weather. 30 completed so far, made in Canada in Delta, priced in writing after one visit on Zoom or at your home.
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
Roofs here
30 completed
From our job book, the first in 2004.
The metal
Aluminum doesn't rust
An oxide film protects it; there's no steel inside to corrode.
The warranty
Guardian Lifetime Limited Material Warranty
Material and finish, original purchaser, transferable once.
What an Interlock® aluminum roof is
An Interlock® roof is made of interlocking aluminum panels, each locked to its neighbours on all four sides with the fasteners concealed under the panel above. Nothing is screwed through the weather surface. The panels are stamped to look like slate, cedar shingle, shake or tile, or rolled as standing seam.
The panels are made in Canada by Interlock Roofing at its plant in Delta, BC. Across the Gulf Islands they are installed by our own company, Interlock Metal Roofing (BC) Ltd., a Canadian owned and operated BC company founded in 1983, from the same Delta address.
Aluminum roofs we've installed on the Gulf Islands
Recent Interlock® roofs installed by our own BC company, on the Gulf Islands first, then elsewhere in BC. Tap a roof to see all of its photos.
Deep Charcoal Slate · Gabriola Island, BC · 5 photos
Colonial Brown Cedar Shingle · Salt Spring Island, BC · 6 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
Deep Charcoal Slate · Sechelt, BC · 4 photos
Why aluminum, for a roof on the Gulf Islands
Planned around the ferry
Every island job is a logistics job: material, crew and the old roof all move by ferry. We plan the sailings, staging and disposal at the estimate so the install window you get in writing is one we can keep.
Dry summers on the islands
The islands are dry from July into the fall, and most homes sit in the trees. Class A is available on our roofs as a complete assembly (two layers of GAF VersaShield® over 12 mm (15/32-inch) plywood, per ASTM E108), and aluminum does not ignite. We walk the gutters, vents and roof edges with you, because that is where embers get in.
Waterfront without the rust
Aluminum does not rust, so a roof within reach of salt spray doesn't do what steel does. Interlock panels lock on all four sides with the fasteners concealed, and wind resistance is warranted to 193 km/h (120 mph) installed to manufacturer specification.
If you collect rainwater
Many island homes catch water off the roof. Tell us at the estimate if yours does, and we'll go through the roof coating, the gutters and the downspouts with you before anything is ordered.
The profiles, and what homeowners on the Gulf Islands choose
Five aluminum profiles: Slate (the most popular), Cedar Shingle, Shake, Mediterranean Tile and Standing Seam, plus solid copper for bays, porches and accents. Every profile needs a minimum 3/12 slope.
In our job book the most common profiles across the Gulf Islands are Slate (17), Shake (7), Cedar Shingle (5).
What's covered, in writing
- Guardian Lifetime Limited Material Warranty, from the manufacturer: material and finish, for as long as the original purchaser owns the home, transferable once. Workmanship is excluded, and ice damming is a stated exclusion.
- 30 Year Alunar® Coating Warranty on the finish.
- 10 Year Limited Labour Warranty from Interlock Metal Roofing (BC) Ltd. on our installation.
- Wind resistance warranted to 193 km/h (120 mph) installed to manufacturer specification.
- Class A Fire Rated Available, as a complete assembly: two layers of GAF VersaShield® over 12 mm (15/32-inch) plywood, per ASTM E108.
How a roof gets done
| Step | What happens |
|---|---|
| 1. Consultation | On Zoom (most BC homeowners choose it) or at your home. We go through profiles and colours, look at photos of roofs like yours, and answer questions. |
| 2. Measure and inspect | We measure the roof and check what's on it now. Cedar, concrete tile and natural slate always come off; a single layer of asphalt can be roofed over only if the inspection finds it suitable. |
| 3. Fixed price in writing | Anything the inspection finds goes into the written quote before you sign, not into a change order later. Strata roofs: we bring the documents the council will ask for. |
| 4. Installation | Our own BC installers, to the manufacturer's specification, with flashing, ventilation and snow guards as planned. |
| 5. Warranties registered | The Guardian material warranty and our labour warranty, with our BC service team after the job. |
Where we work
30 completed Interlock® roofs across the Gulf Islands in our job book, the first in 2004. 5 communities have their own page with their install record.
Questions, answered
Who installs aluminum roofing on the Gulf Islands?
Interlock Metal Roofing (BC) Ltd. installs the Interlock® aluminum roofing system on the Gulf Islands from its office at 9969 River Way, Delta, the same address as the plant that makes the panels. The company was founded in 1983 and installs every roof itself. Call (778) 745-2860.
Is aluminum roofing good for the Gulf Islands?
Aluminum doesn't rust, absorbs no water and cannot rot, so rain, moss and salt air have nothing to work on, and its smooth surface sheds snow. Valleys and gutters still need clearing of needles and leaves, and ice damming is a stated exclusion of the material warranty, so we look at ventilation with you.
Is an aluminum roof better than a steel roof?
They are both metal roofs, but steel depends on its zinc or aluminum-zinc coating to keep from rusting, and aluminum has no steel to rust. Aluminum is also about a third the weight. Steel roofing usually costs less up front. Our steel vs aluminum guide sets out the differences.
How much does an aluminum roof cost on the Gulf Islands?
It depends on the roof's area, pitch and complexity, what comes off, the profile and options such as the Class A assembly. Our metal roof cost guide shows real price ranges from our own BC contracts, and we give your fixed price in writing after one free visit.
Can an aluminum roof go over my asphalt shingles?
Sometimes: 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.
Can the consultation be done on Zoom?
Yes, and most BC homeowners choose it: we go through the roof, the profiles and the colours with you on screen. Book online or call (778) 745-2860.
How long does an aluminum roof last?
Aluminum has been known to last over 100 years. That is a property of the metal, not a promise; what is in writing is the Guardian Lifetime Limited Material Warranty, the 30 Year Alunar® Coating Warranty and our 10 Year Limited Labour Warranty.
Sources
- J.R. Davis, "Aluminum and Aluminum Alloys", Alloying: Understanding the Basics, ASM International (2001)
- Interlock Roofing: aluminum shingles, technical specifications
- FireSmart BC Homeowner's Manual
- Guardian Lifetime Limited Material Warranty (full terms)
- 10 Year Limited Labour Warranty (BC)
Product specifications are the manufacturer's (Interlock Roofing). Install counts are from our own job book. Reviewed by Scott Plumptree, October 8, 2026.
Get your aluminum roof 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
