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Interlock® Lifetime Metal Roofing Systems

#madeincanada #canadianowned #canadianoperated 🇨🇦

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A Trusted Maritime Roofing Company Since 2007.

Solve your roofing problems for a lifetime with an Interlock Lifetime Roofing System.


Metal roofing is a durable, attractive roofing option that can withstand extreme weather conditions and last for decades. It is available in many designer colours that will add curb appeal to your home. Metal roofing is also energy-efficient, adding to your peace of mind.


All Interlock Lifetime Roofing Systems are backed by an exclusive Lifetime Limited, 50 year Transferable Material Warranty so that you can be confident in your investment. Metal roofing is the perfect solution for all climate conditions, including near the ocean, where steel would rust. Contact us today to learn more about Interlock Lifetime Roofing Systems!

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Never Re-Roof Again.® with Canada's Best Roof™

100% Canadian owned and operated, Maritime Permanent Roofing Ltd. is located in Dartmouth, NS, Canada. Our service area: Nova Scotia, PEI, Southern New Brunswick.

Choose from five durable metal roof profiles, including Slate, Cedar Shingle, Shake, Mediterranean Tile, and Standing Seam. All profiles are available in heavy gauge aluminum and solid copper. With the addition of solar brackets, all our roofing systems are solar-compatible.

 ★★★★★ Posted on Google

Fiona hurricane aftermath on PEI. I had a Interlock shingle roof installed in 2013. The roof survived the wrath of Fiona incredibly well..only a tiny amount of damage to the the ridge vent… which was amazing considering during Fiona I thought the entire house might collapse. The second incredible thing was that 3 days after I contacted the company to repair the minor ridge vent damage they were in my yard and fixed it. I am so grateful for all this company has done. Heart felt THANKS!!!!!

Diane W.

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Best Slate Roof
Best Metal Shingles
Best Metal Shake Roof
Best Metal Tile Roof
Best Standing Seam Roof
Best Copper Roof

Industry Partnerships

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

BBB Accredited Business
Metal Roofing Alliance
Guild Quality
Homes Stars
Baeumler Approved Roofing Contractor
Interlock Lifetime Metal Roofing Systems Logo
Save at least $1250 off Interlock Metal Roofing

Aluminum Roofing Built for Life in Atlantic Canada

Trusted for over 17 years with thousands of installations across Nova Scotia.

Cedar Shake Roof Tear-Off Replacement
Cape Cod House with Metal Roof Aluminum Shingles
Alunar Coating System logo
CRRC Cool Roof Rating Council rated product

All Interlock Lifetime Metal Roofing Systems are protected with the Alunar® Coating System. The cool roof pigment technology helps reduce heating and cooling costs for your home.

Alunar Coasting System diagram

Interlock’s reflective surface actually reduces your attic's temperature during summertime heat, saving you up to 25% on your cooling costs†.


† As per Cool Roof Rating Council (CRRC) and Oak Ridge National Laboratories (ORNL)

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Common Questions

See some common FAQ's below, or call us at 1-866-733-5811

  • What are your business hours?

    Our Dartmouth, NS office is open:

    • Monday-Friday 9 AM- 5 PM

    Our crews are available 7 days a week.

    Our Sales Agents are available 7 days a week.


    Please call or inquire to make an appointment.

  • Where is the office located?

    Maritime Permanent Roofing Ltd.

    101 Thornhill Dr #105

    Dartmouth, NS B3B 1S2


    1-866-733-5811 

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

    All our products are solar compatible. Our solar brackets can be installed to house solar crystalline panels.

  • How much does an Interlock Metal Roofing System 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 Laurie for pricing info. 


    Please visit our knowledgebase for more information:

  • Are metal roofs loud?

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


    Please visit our knowledgebase for more information:

  • Do you offer financing?

    Yes! We’ve partnered with Financeit and Simply Financing Group to offer you affordable monthly, bi-weekly and weekly payment options for your purchase. Visit our Financing page for more info.

  • 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. 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 energy-efficient CRRC rated (Cool Roof Rating Council).

  • Do metal roofs protect against hail?

    All Interlock® Roofs are made from heavy gauge aluminum which has been tested and has 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 with 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.


    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 keep the integrity of our Lifetime Limited Warranty we only use certified Interlock crews for installation.

  • Is Interlock Roofing available in my area?

    Interlock Lifetime Metal Roofing Systems are available all across Nova Scotia, PEI, and Southern New Brunswick.