Metal roof


Old 09-04-07, 05:51 PM
TomZ1's Avatar
Thread Starter
Join Date: Sep 2003
Location: New Hampshire
Posts: 174
Received 0 Votes on 0 Posts
Smile Metal roof


I am about to reroof my seasonal camp with metal roofing.

At the risk of asking a dumb question...are there any grounding/bonding requirements for this?

Sponsored Links
Old 09-05-07, 04:20 AM
Join Date: Oct 2006
Location: Wilmington
Posts: 4,219
Received 0 Votes on 0 Posts
Not sure if this applies to roofing, check your local authority. Code says, "Where extensive metal in or on buildings may become energized and is subject to personal contact, adequate bonding and grounding will provide additional safety." But I did not find specific references to roofing, not to say it is not there. As always, local code applies.
Old 09-09-07, 08:29 AM
brewcityc's Avatar
Join Date: Aug 2007
Posts: 164
Received 0 Votes on 0 Posts
I would treat it as a grounding electrode. If you're working on your roof and using power tools, you don't want it to be able to become energized. I would suggest running a #6 copper wire from the panel to bond the roof to ground. If the wire is run so that it's safe from harm (IE in a wall), a raceway is not required. The wire can be bonded to the roof with a mechanical lug. I would bolt the lug on to assure good continuity. Make sure that the lug is rated for your wire size and type of metal being used. If the lug's rated for aluminum and you're using copper wire, you have to use an antioxidation compound such as NO-OX. Also keep in mind what type of metal your roof is made of. Your best bet is to mount the ground lug in a spot where it's free from the elements to help avoid corrosion and assure a good, low resistance ground.
Old 09-09-07, 10:03 AM
Banned. Rule And/Or Policy Violation
Join Date: Feb 2006
Location: North of Boston, MA.
Posts: 2,113
Received 0 Votes on 0 Posts
Treat it as The old Aluminium sidding. Yes ground it, and all sheets should be bonded together. This may very well be accomplished by the install method, If nailed in, at each overlap point (at a min.) install a self tapping screw, or nut and bolt.
Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Ask a Question
Question Title:
Your question will be posted in: