Nasir is a true professional. Interlock sent him right out.
— Russ M., Melrose, MA
Middlesex County, MA
Whether your home is a Concord colonial or a Somerville triple-decker, the outcome is the same: buy this roof once and stop planning for the next one. Interlock installs across Middlesex County in profiles that suit period houses and a weight that suits old framing — with a lifetime limited warranty that transfers when you sell.
★ 4.7 average from 504 verified Massachusetts reviews
Massachusetts line: (508) 257-7859 · Toll-free 1-866-733-5811
Lexington, Concord and Winchester homes were built for wood shake or slate, and several sit under local historic review. Interlock's cedar-shake and slate profiles hold those rooflines honestly — no compromise to get a permanent roof.
In Cambridge and Somerville the constraint is weight and access: tight streets, shared walls, decking already carrying layers of old roofing. Aluminum is the lightest permanent system available, which often makes it the only permanent option that works.
Inland Middlesex runs colder than the coast, so freeze-thaw cycling drives most winter failures — meltwater backing up at a frozen eave and into ceilings. Four-way interlocking panels leave no exposed lap seam for it to get under.
One installation, a lifetime limited warranty, and the next owner inherits an asset instead of a project.
Gallery
Real homes, real installations — photographed after completion.

Lowell, MA
Deep Charcoal

Lowell, MA
Deep Charcoal

Chelmsford, MA
Deep Charcoal

Chelmsford, MA
Deep Charcoal

Chelmsford, MA
Deep Charcoal

Stoneham, MA
Deep Charcoal

Stoneham, MA
Deep Charcoal

Lowell, MA
Charcoal Grey
Reviews
Nasir is a true professional. Interlock sent him right out.
— Russ M., Melrose, MA
Nazar was wonderful! Gave us all kinds of suggestions to help us keep our beautiful roof long lasting for a lifetime
— Karen C., Clarksburg, MA
Jose and the technician communicated easily and reviewed future work with pricing. Detailed work and assessment.
— Elizabeth S., Framingham, MA
The worker did a great job removing the furnace flue that was not needed anymore
— Mark O., Tyngsborough, MA
Technician went above and beyond. He had to resecure my gutter before fixing my damaged shingles. The repair looks like they had never been damaged. Super nice gentlemen. So glad I purchased my roof through Interlock back in 2004!
— Barbara B., Upton, MA
The warehouse manager went out of his way to accommodate my payment related requests. My installer was professional, answering all my questions and providing pictures of each step in the repair process.
— Maureen G., Athol, MA
Cambridge, Lowell, Newton, Somerville, Framingham, Waltham, Malden, Medford, Everett, Arlington, Woburn, Marlborough, Billerica, Chelmsford, Natick, Watertown, Lexington, Concord, Winchester, Burlington, Melrose, Stoneham, Reading, Wakefield
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