Lightning Rods

Lightning rods as we now know them were first invented in 1749 by Benjamin Franklin in the Americas. A lightning rod is a metal rod or conductor, typically made of copper or aluminum, that is mounted to the highest point of a structure. This rod will have a conductor, generally a copper wire, attached to the ground. If hit by lightning, the wire directs the electrical current to the ground where it will be absorbed, it will spare the structure damage. Lightning rods are often placed on the top of tall structures, trees, monuments and sometimes even boats.

Lightning rods are an essential piece to a comprehensive lightning protection system. They are known by a few different names: lightning rods, air terminal, Franklin rods or strike determination devices. Lightning is able to cause substantial damage to masonry, wood and other building materials because of its ability to heat them and cause fire.

In the nineteenth century lightning rods began to take on an ornamental nature in addition to their function. They were often disguised as finials or placed in weathervanes. Around this time it became the practice to install a glass orb in the lightning rods. It was a beautiful decoration, but served a practical function as well. If lightning struck the rod, the glass orb would shatter and the property caretaker would know to inspect the building for electrical damage.

There are still many decorative choices for a lightning rod. So, whether you are looking for pure function, or style and function, you will be able to find the perfect lightning rod to complement your copper roof.