Bumpyroad wrote:
I'd be more concerned with a metal sided unit going thru a hail storm which is more likely than a lightning strike.
bumpy
Let's be clear. The latest figures I've seen suggest that less than 20 people died from lightning strikes in the US last year, and all of them outside. However, it's estimated that 9 out of 10 people struck by lightning survive, but are injured to various degrees. Which suggests that maybe 200 people in the US are hit by lightning every year.
The original poster asked for differences between metal and fiberglass, and protection from a lightning strike is certainly one of them. How much WEIGHT we should give to that fact is something each of us needs to decide for themselves.