Bonding metal roof

[Doctor Electric]

This house that I'm wiring they decided to put a steel or metal roof on top of it some nice roof decking looking stuff however brings an important question to mind is that should I be running a bonding wire and bonding that metal roof in with the electrical system? yes!! I should but how exactly would I bond a roof I can't put a screw in it obviously any thoughts on this will be helpful guys it's a residential thanks

 

[Dennis Alwon]

I have never bonded a metal roof on a home. IMO there is no reason to and it is not likely to get energized.

 

[rc/retired]

I have never bonded a metal roof on a home. IMO there is no reason to and it is not likely to get energized.

Bingo!

 

[tom baker]

And if the roof is fastened with self tappers with sealing washers, there will be no conductivity between panels.

 

[Doctor Electric]

What if the house gets struck by lightning though the roof in particular wouldn't it need equipotential bonding for low impedance path for the lightning to get the ground?

 

[Dennis Alwon]

What if the house gets struck by lightning though the roof in particular wouldn't it need equipotential bonding for low impedance path for the lightning to get the ground?

If the roof isn't connected to earth then wouldn't lightning want to find another path

Check this out-- I cannot verify the integrity of it as any expert on lightning will be vilified by someone else

Are metal roofs lightning magnets?

According to The Metal Construction Assocition, a metal roof will not make lightning more likely to strike, but it may make a lightning strike less dangerous if it occurs. That’s right, less dangerous, not more.

www.bdcnetwork.com

 

[Eddie702]

1/4" beam clamp with the ground wire in the unused hole, and a pc of plate to stiffen up the clamp.

Unlisted for sure LOL

 

[tom baker]

A lighting protection system is far beyond running a small conductor to bond the roof. Lightning protection is not in my wheelhouse, I suspect the lightning system contractors would say "all or nothing".
They may get the metal roof question frequently, suggest you ask them about the metal roof.