Harger president ceo harger lightning grounding grayslake ill.
Roof top hvac lighting protection.
Penetrations especially should be located and marked prior to roofing so they can be found afterward.
Lightning is a powerful destructive force of nature and will strike a building regardless of its type of roofing.
Still the type of roofing is one of several risk factors.
Lightning protection of roof top equipment.
A metal roof should never have copper lightning protection components installed on it unless the roof metal is copper says mark s.
For built up and modified bitumen membranes attach air terminal base plates with asphalt roof cement.
Before getting on the job the roofer lps installer and general contractor should agree on project schedule and roof access as well as review proposed locations of lightning protection components.
The recommended protection diagram shows roof mounted air condition equipment to be bonded to the lightning protection system.
Does this not serve to create an internal ground loop into the building.
The building ground ties to the internal grounding network and thus to the air handling.
If there were any doubts about the dangers of poorly anchored rooftop equipment during a hurricane building consultant thomas lee smith can point to case after case of flying mechanical units rolling condensers and whipping lighting protection systems causing extensive damage to buildings.
The only way to protect a building is with a properly designed and installed lightning protection system lps.
Nor do metal roofs protect a building against lightning.
For single ply membranes attach air.
Lightning protection fasterners hardware trusted to protect since 1910 since our beginning thompson has sought to be the industry leader in manufacturing the highest quality conductors and components.
Metal roofs do not attract lightning strikes.