Expert tips

Washington Metal Roofing Blog

A roof that changes everything.

By Scott Plumptree • March 13, 2025
Bellingham, WA
Metal Roof Pitch | Slope = Rise over Run

Metal Roof Pitch | Slope = Rise over Run

By Scott Plumptree • November 24, 2022
What is the Minimum Pitch for a Metal Roof?

Aluminum Facts

By Scott Plumptree • June 24, 2022
Aluminum is an infinitely recyclable metal, and recycled aluminum is as strong as first-generation aluminum but only requires 8% of the energy needed to manufacture it rather than recycling it.

Industry Partnerships

Interlock Metal Roofing is proud to be members ​with the following roofing industry partners​

BBB Accredited Business
Metal Roofing Alliance
Cool Roof Rating Council
Guild Quality

Common Questions

See some common questions and answers below, or call us at 1-866-733-5811
  • What are your business hours?

    Our Calgary office is open 

    Monday-Friday 9AM- 5PM


    Our crews are available 7 days a week.

    Our Sales Agents are available 7 days a week.

  • Where is Interlock Roofing located?

    Interlock Industries (Alberta) Ltd.

    210, 3750 46 Ave SE

    Calgary, AB T2B 0L1


    1-866-733-5811 

  • Where is Interlock Roofing manufactured?

    Interlock Roofing Ltd.

    9969 River Way, Delta, BC 

    V4G 1M8 Canada

  • How much does an Interlock Roof cost?

    Our product is not an off-the-shelf roofing material. Plus the installation procedures vary from structure to structure. For instance, a home with a 3/12 pitch is easier for our installers to work on therefore labour costs will be less expensive. A home with no valleys, chimneys, skylights, or dormers will also be less expensive. Please contact Marcella for pricing info. 

  • Are metal roofs loud?

    Our customers keep telling us that their new Interlock Roof is no noiser than their prevoius asphalt shingle roof. 

  • Do you offer financing?

    Yes! We’ve partnered with Financeit to offer you an affordable bi-weekly and monthly payment options for your purchase. Read more.

  • Does a metal roof attract lightning?

    No, a metal roof will not make lightning more likely to strike, but it may make a lightning strike less dangerous if it occurs. A conductive metal roof gives lightning a low-resistance path to the earth.

  • Are metal roofs hot?

    All Interlock Metal Roofs are coated with the Alunar® Coating System embedded with Teflon™ Surface Protector. The "Cool Roof" ceramic pigment technology in the coating reflects and emits more of the sun's uv rays from entering the attic space. Interlock Metal Roofing Systems are CRRC rated (Cool Roof Rating Council) and Energy Star® rated (Available is USA Only)

  • Do metal roofs protect against hail?

    All Interlock® Roofs are made from heavy gauge aluminum which have been tested and have surpassed the industry standard measurement for impact resistance:. UL 2218 — Standard for Impact Resistance of Prepared Roof Covering Materials.

  • Can you walk on a metal roof?

    While it is safe to walk on, in accordance to manufacturers’ instructions, the low-maintenance Interlock® Roof almost eliminates that need. 

  • What metal is an Interlock Roof made from?

    All Interlock® Roofs are available in heavy gauge aluminum coated with the Alunar Coating System embedded with Teflon™ Surface Protector.


    In addition, solid copper is also available in all profiles.

  • Can I install an Interlock Roof myself?

    While some of us enjoy a good DIY project, to kept the integrity of our Lifetime Limited Warranty we only use certified Interlock crews for installation.

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