Do I Need Lightning Protection?
Evaluate your risk with the National Fire Protection Association's (NFPA 780-2000) online Risk Assessment Guide below.
Lightning loss risk assessment involves the evaluation of various criteria to determine the risk of loss due to lightning. This guide is designed to assist in that determination. As a guide, it is not possible to cover each special design element that may render a structure more or less susceptible to lightning damage. In these special cases it is recommended the user seek professional advice. Personal and economic factors are very important and must be considered in addition to the assessment obtained by use of this guide.
To determine the need for protection against lightning for a given building or structure, the following variables are to be considered:
- Lightning Flash Density
- Structures Collective Area
- Relative Structure Location
- Type of Construction
- Structure Contents
- Lightning Consequence
- Submit the Information
In the following areas, select the option that best describes your situation. After you have selected all the options, use the "Calculate Risk" button at the bottom of the page. Your risk assessment will be returned.
Step 1 - Lightning Flash Density
Few areas in the United States are free from thunderstorms and their attendant hazards, but some areas have more storms than others. The map shows the average lightning flash density in flashes/km2/year - for the United States. Please select the area where the structure is located.