Roofing/metal roof


I have a brick ranch that I just had a tearoff with a steel roof installed. My question is should it be grounded?

There are some considerations for the answer to this question.  I am assuming that the metal roof was installed over a wood deck such as plywood.  I am also assuming that it was attached with screws through the metal roof directly into the wood deck.  If these assumptions are correct, my opinion is that the roof is already grounded.  Secondly, your electrical system is grounded to the outside by way of a copper or aluminum cable to a ground rod.  This protects the critical areas you are most likely concerned with, electronics and other appliances.

What you are referring to , most likely, is the lightening suppression systems you see on commercial buildings with metal roofs.  In those installations there is often direct contact between the metal roof and the metal structure of the building.  This often requires a lightening suppression system in certain jurisdictions for code purposes.  


All Answers

Answers by Expert:

Ask Experts


Leon R. Dazey


Metal roofing on all structures. Emphasis on standing seam roof systems.


I have over 30 years experience in the sales, marketing and installation of metal roofing. I have worked with contractors, owners, manufacturers and attorneys. I perform forensic inspections on metal roof systems and offer recommendations for the repair of all deficiencies. I have developed multiple presentations on the correct installation of commercial metal roofing.

I have written articles for Metal Construction News and for MetalMag.

Two years of college in the study of communication.

Past/Present Clients
My client list includes major metal building manufacturers, metal roofing manufactures and building owners. These include MBCI, Schulte Building Systems, Inland Building Systems, USA Shanghai China, Bristol Meyer Squibb, General Tommy Franks and multiple others.

©2017 All rights reserved.