Frequently Asked Questions

Straight answers from 40+ years of metal roofing experience

Considering a lifetime metal roof? These are the questions homeowners ask us most. If you don't see yours here, browse the Knowledge Base or contact us — we're happy to help.

How much does an Interlock Metal Roofing System cost?

Every roof is different — pricing depends on the size and complexity of your roof, its pitch and access, and the profile and color you choose. As a premium lifetime system, an Interlock roof costs more upfront than asphalt, but it never needs replacing — paying for itself through decades of zero re-roofing costs and lower energy bills. Request a free, no-obligation quote for exact pricing on your home.

What metal is an Interlock Lifetime Roofing System made from?

Interlock roofing systems are made from heavy-gauge aluminum — lightweight, rust-proof, and largely recycled content. Every panel is protected by the Alunar® Coating System, a 70% PVDF finish engineered for color retention, chalk resistance and corrosion protection.

Do metal roofs protect against hail?

Yes. Interlock Metal Roofing Systems carry the UL 2218 Class 4 impact rating — the highest hail resistance rating available — proving they can withstand a 2-inch steel ball dropped from 20 feet without cracking or splitting, a test that simulates large hail.

Are metal roofs hot?

No — quite the opposite. The Alunar® Coating System uses Cool Roof ceramic IR-reflective pigments that reflect solar energy instead of absorbing it. Interlock roofs are CRRC rated and can help reduce attic temperatures and summer cooling costs by up to 25%.

Does a metal roof attract lightning?

No. Lightning strikes the highest object in an area regardless of material — a metal roof does not increase the odds of a strike. In fact, if lightning does strike, a metal roof is non-combustible and disperses the energy safely, making it one of the safest roofing choices in a storm.

Are metal roofs loud?

No. Interlock roofs are installed over your existing roof deck and underlayment, so rain noise is comparable to — and often quieter than — an asphalt roof. The interlocking heavy-gauge aluminum panels don’t drum the way thin exposed metal sheets on a barn would.

Can you walk on a metal roof?

Yes — Interlock roofing is designed to be walkable when proper care is taken. We recommend soft-soled shoes, walking in the lower portions of the panels, and hiring a skilled professional for any work that requires accessing your roof.

Can I install an Interlock roof myself?

Interlock systems are installed by trained, certified professionals. Correct installation is essential to the 4-way interlocking design’s wind resistance and to your warranty coverage, so DIY installation isn’t recommended or supported.

Can I finance my Interlock Lifetime Roofing System?

Yes — financing options are available in most regions. Ask your local Interlock representative about current financing programs and promotions when you request your free quote.

Can I add solar panels to an Interlock Metal Roofing System?

Absolutely. Interlock roofs are solar-ready: panels can be mounted without penetrating the roofing surface, and the 50+ year lifespan of the roof means you’ll never need to remove your solar array for a re-roof.

Still have questions? Talk to a roofing specialist.

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