The Interlock Blog
Engineering, case studies, and field-tested guidance on lifetime metal roofing.
Showing 1–12 of 30 articles
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What Makes Interlock an Industry Leader in Premium Metal Roofing
"Industry leader" is a claim every roofer makes. Interlock backs it with specifics: corrosion-proof aircraft-grade aluminum, the Alunar® PVDF coating, a concealed four-way mechanical interlock warranted to 120 mph, an expected 50–75 year service life, and a transferable Lifetime Limited Warranty. The same system the U.S. National Science Foundation chose for Antarctica is what goes on your home.
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Extreme Roofing: Antarctic Science Base Case Study
When the U.S. National Science Foundation needed roofing for a research module bound for Antarctica, it chose Interlock. The aluminum system endures −60°F cold, 100+ mph katabatic winds, and extreme UV, then survived a 995-mile overland traverse to its site — the ultimate proof that a roof built for the South Pole will protect any home.
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Hon. Jill McKnight Discusses Manufacturing and Tariffs with Interlock Metal Roofing
On July 3, 2025, The Honourable Jill McKnight, MP for Delta and Canada’s Minister of Veterans Affairs, toured Interlock Metal Roofing’s Delta, BC manufacturing facility to discuss Canadian aluminum manufacturing and the impact of metal tariffs on a homegrown industry.
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Why This Bremerton Home Chose a Roof That Doesn't Rust
A waterfront Bremerton, Washington home traded its rust- and rot-prone roof for a Copper Penny Interlock Aluminum Shake — the warm look of copper, with aluminum that can’t rust. Sealed in Alunar® coating and locked four ways against salt-laden Puget Sound wind, it’s engineered to be the home’s last roof.
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The Ultimate Guide to the Best Types of Metal Roofing for Your Home
Interlock makes six aluminum and copper roofing profiles — Slate, Cedar Shingle, Cedar Shake, Mediterranean Tile, Standing Seam, and Solid Copper. All share the same engineering: lightweight aluminum (0.41–0.59 psf), a four-way mechanical interlock, a PVDF Alunar® finish, UL 2218 Class 4 impact resistance, and a lifetime warranty.
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Maximizing Energy Efficiency: The Benefits of Metal Roofs
Interlock's reflective aluminum roofing can cut cooling costs by up to 25% by bouncing the sun's heat away instead of absorbing it. Paired with a lifetime warranty, Class A fire rating, and 120 mph wind resistance, it's an energy upgrade that protects your home for decades.
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What? You Think Roofs Last Forever?
No roof lasts forever — weather wears every roof out eventually. But the gap is enormous: asphalt shingles last 15–20 years (often less), while an Interlock aluminum roof is built to last 50+. Choosing the right replacement material decides whether you re-roof once or three times.
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Why Proper Roof Installation Is Crucial for Your Home
An Interlock roof is an interlocking system of components — panels, flashings, valleys, backpans, collars, drip caps, underlayment, and specialty fasteners — not a stack of parts. It’s engineered to be installed correctly by trained, certified Interlock installers, which is why it isn’t a DIY product and why expert installation protects both performance and the lifetime warranty.
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Investing in a Sustainable Future
A truly sustainable roof does two jobs: it lasts so long it’s rarely replaced, and it helps power the home. Interlock pairs a 95%-recyclable aluminum roof — made largely from recycled stock and installable over your old roof — with solar readiness, for decades of clean energy on a roof that outlives the panels.
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Understanding and Preventing Ice Dams: Expert Tips for Homeowners
Ice dams form when heat escaping into the attic melts roof snow, which refreezes at the cold eaves and traps water that backs up under the roof. The fixes are attic insulation and ventilation — and a smooth metal roof that sheds snow and ice before a dam can build.
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Installing Solar Panels with an Interlock Metal Roofing System
An Interlock metal roof is an ideal base for solar: it lasts 40–70+ years (far longer than a 25–30 year array), so you never remove panels to re-roof. Standing Seam lets panels clamp on with no roof penetrations, the install doesn’t void the warranty, and the reflective surface keeps panels cooler and more efficient.
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Roofing Wind Damage
Interlock metal roofs are tested and warranted to resist 120 mph winds — Category 2 hurricane strength — and are Florida Building Code approved for High-Velocity Hurricane Zones. The secret is a four-way mechanical interlock with no exposed fasteners for wind to catch and peel.
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