Guest User
I've been told that a metal roof should be grounded. What method(s) are recommended? I have a two story house with a metal roof. It is approximately 42 feet by 28 feet with log siding. It is located at the highest point on a North Alabama mountain (1200 feet elevation).
Allan Reid
Dura-Loc Roofing Systems, Inc.
I am assuming that you are referring to lightning strikes. The probability of a lightning strike is base on the location and topography around your home not on whether one has a metal roof or not. The question then becomes what can one do to minimize the impact of a lightning strike? Having a metal roof allows one to readily ground it if you chose which would help minimize any damage if you did take a hit. As copper is the best conductor one needs to be sure that if you use it that it is compatible with your roofing mayterial. Run off from copper can react with paint finishes and aluminum. I have seen the copper cable run under the aluminum roof metal and attached with zinc strips to the metal roof. If you have one of the firms install arrestors at the ridge, make sure that the copper is either painted or enclosed in a plastic sheath. Sounds like your house sits in a higher probability location and you may want to consider it but again do not do it just because you have a metal roof. Good luck.
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