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Sand Murphy
7/30/2008
To save my injured back from endless roof-raking, I am considering putting a metal roof on over an existing single-layer shingle roof. Part of the roof needs to be repaired (2 sheets of plywood replaced) because of a falling tree limb & weight damage from last years heavy snowfall. Otherwise, the roof is fine, there are no venting or moisture issues. The pitch is 6/12 on a simple ranch house in the woods which gets minimal sun during the winter months. My question is, once the repairs are made, which type of metal roof should I install - shingle or sheet (secure fastner?). My concern is condensation as well as product finish & durabiliy (which products are best for these harsh winters, can it withstand the endless barage of acorns & an occasional branch). And which is easier to work with if I decide to put on an addition in a few years? One contractor recommends Ideal AmmeriCana metal roofing with underlayment & horizontal strapping 16" on center over the exiting roof. But I am concerned with the possiblity of condenstation problems, as well as the idea of exposed fastners (do they loosen over time, causing leaks ??) Another option is the shingle-style roofing -I am looking at Interlock brand. But I need to know there are definite advantages to this type of roof to justify the higher cost. Help!
Todd Miller
Isaiah Industries, Inc.
7/30/2008
Wow. This is a very complex question. I mean, metal roofing comes in a wide range of styles and types. Some are more costly than others and that is usually because they are produced in more expensive ways from more expensive metal and often with a more expensive paint finish. It might be easiest for us to talk through things. Feel free to call me at 1-800-543-8938 ext 201
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