If you're considering installing a lightning protection system, here's a
statistic to consider. According to data compiled by Westinghouse
Electric Company, given an average location and exposure, a 50 ft. high
building stands a greater chance of being struck by lightning once a
year than a card player has of filing an ordinary flush in a poker game.
In the United States the average geographic area is subjected to 40
lightning strikes per square mile every year. That's a lot of lightning!
Of course, not every one of those strikes is going to do damage to
person or property, and many homes are situated to be less likely
targets for a lightning strike in the first place. Lightning rod
installation is not necessary for every home, but for those situated in
areas where lightning is a frequent threat, lightning protection systems
are excellent investments.
How Lightning Protection Systems Work
A lightning protection system is made up of several components.
Lightning rods (air terminals) are the easiest part of the system to
spot, but other components like surge arrestors and secondary conductors
are also involved. Each component of a lightning protection system is
designed to channel a lightning strike safely to the ground without
causing harm to any part of the property; the rod provides a contact
point, surge arrestors protect electrical equipment and wiring,
secondary conductors prevent spark-over and side-flashes, and ground
terminals carry electricity into the earth, where it is harmlessly
dispersed.
Contrary to how they might seem to function, lightning rods do not
"attract" lightning. Their sole-function is to act as a contact point so
the lightning can be harmlessly grounded. The presence of a lightning
rod doesn't draw lightning towards the home, but if lightning does
strike, having a lightning rod in place gives the energy from the bolt a
fast and effective path to the ground.
Where Lightning Rod Installation Is Most Appropriate
The fact is: Given the right circumstances, lightning can strike just
about anywhere. However, lightning protection systems are likely to be
more beneficial to certain properties in specific environments. Homes on
the edges of large bodies of water are often more at risk of lightning
strikes, as are houses built in large expanses of flat lands or on
mountain tops. Tall buildings in urban areas are also of particular
concern. While lightning rod installation is appropriate in many other
situations, homeowners in any of these settings should seriously
consider installing a lightning protection system if one is not already
in place.
Lightning Protection System Companies
Companies that specialize in installing lightning protection systems are
well-versed not only in the components of the systems they offer, but
in lightning safety in general. While a company that sells lightning
rods will certainly be able to tell you if your home makes a
particularly likely target, they will also be able to give you advice on
how to make your property safer by means other than lightning
protection systems.
Lightning Protection Through Landscaping
If is not uncommon for a professional to suggest alterations in
landscaping to reduce the chances (or reduce the potential property
damage) of lightning strikes. In most normal situations, lightning
strikes are difficult to predict with a high amount of accuracy, but
alterations like removing tall trees or certain overhanging limbs or
changing the location of a flag pole may lower your chances of a strike
causing severe property damage; when such alterations are suggested by a
professional, they should, of course, be given careful consideration!