If you live in several of the Southern states such as Texas or Florida you may want to look into your windstorm policies to see if you are getting a windstorm mitigation discount.  Often insurance companies will provide lower rates for those homes which have wind mitigation features such as storm shutters, impact resistant glass, and other features based on roof design and roof construction. 

Insurance companies often rely on Home Inspection companies which often offer

these types of inspections.  Typically these companies will look for these features and provide a report to you or your insurance company with the results.  The amounts you can typically save vary, and it is recommended that you contact your insurance company to determine if you qualify for any discounts based on the mitigation features present in your home.  Savings are often well worth the small amount that a typical inspection costs to have this done.

If you live in Florida you may want to look into resources such as http://www.mysafefloridahome.com as an additional source of information.