02-09-2018, 05:12 AM
The lightning damage I've seen on homes occurs from lightning entering through the grounding system, through a nearby ground or tree strike, It then exits at a random spot anywhere in the house. It could be on a conductor as big as #6 stove wire or as small as a 20gauge phone wire. A metal roof is better than shingles. The metal will dissipate the charge over the entire span. But Wet shingles won't. That's why when lightening hits a wet shingle roof it blows a hole in it.
One Thing I can always be sure of is that things will never go as expected.