Myths Uncovered

Lightning
Steel roofing is no more susceptible to lightning than any other roofing material. Lightning most frequently strikes the highest point in any terrain; and if your roof is at the highest point of the surrounding terrain, you can install lightning rods. A metal roof will not increase the risk of lightning striking your home. But, since metal roofing isn't combustible or flammable it is a low risk. And if you're home were to be struck by lightning, the metal roofing would actually disperse the energy safely throughout the structure. If you live in Florida, the lightning capital of the nation, then metal roofing is a low risk & desirable option.

Rust 
One of the common concerns of metal roofing is Rust. We offer a wide variety of metals, and these metals are coated to prevent rusting. Our most common selling metal is Galvalume, which is made up of Zinc and Aluminum. You will find that Galvalume is actually more rust resistant than your galvanized metal. We also offer painted metal to provide a long-lasting color for any homeowner. Most of the metals come with a warranty ranging from 20 - 50 years. 

Noise
The noise from metal roofing is no more than what you hear now. According to one study, the noise level of a metal roof are about the same as other roofing products such as asphalt or wood shingles or clay tiles. 

Durability
Many people think that you can't walk on your metal roof. Truth is that you can walk on it, but you should use caution and be careful as you would any other kind of roof.

Metal roofing is very durable and resistant to hail, fire and wind damage. In fact, many metal roofing products have the highest impact resistance and hail rating granted by the insurance commissions in the hail belt regions of the U.S. Some insurance companies even provide a reduced rate for metal roofs.All metal roofing products are very wind resistant. Many styles have been tested to withstand hurricane force winds; and wind warranties can be as high as 120mph. A steel roof is the most fire safe roof. It is classified as a noncombustible roofing material with a Class “A” rating – the highest rating given.

See More at : http://www.bbmetals.net/metal-roofing-resources/faq