Interlock Roofing System

So goes the not-unreasonable reasoning for this new product, shown in mid-March at the Westchester County Home Show. Manufactured by Canada's Interlock Roofing Ltd., one of North America's largest roofing-material makers, the same-name product is a series of metal shingles fashioned to look like slate or tile. Less expensive and lighter than the real stuff, the product, says the company, has passed Underwriters Laboratories' "Standard 2218 Class 4: Impact Standard for Impact Resistance of Prepared Roof Covering Materials." We're sure your building manager knows what means.

According to Interlock, aluminum roofing doesn't rot, split or crack, and in many cases can be installed right over your existing roof, "saving the costs of tear-off and the environmental problems associated with disposal." There's a 50-year, transferable, non-prorated limited warranty. And it's available in your choice of "designer colors," which we suppose are much fancier than real colors.

Joking aside, the pros and cons of aluminum siding are well-enough established that it won't be hard for you to know if this kind of roof is right for your co-op or condo. At the very least, an added layer of protection ain't a bad idea. As for how it looks, it seems fine in pictures. And who's going to be looking, anyway? Pigeons?

Interlock Roofing Ltd. • 9969 River Way, Delta, British Columbia, Canada V4G 1M8 • toll-free (888) 766-3661

Local distributor: New York's Best Roof, Inc. • PMB 188, 2600 South Rd. Ste 44, Poughkeepsie, New York 12601 • same toll-free number as above

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