Insurance programs vary
There are two primary types of insurance available. The lowest cost insurance plan is an Actual Cost Value (ACV) plan. This is an estimate of the current value of your roof, adjusted by depreciation. An ACV only plan will decrease every year, increasing your out of pocket cost to repair or replace your roof as time goes on. Higher cost, but more comprehensive insurance plans are available. These are known as Recoverable Cost Value (RCV) plans. Your RCV plan will pay out to bring your roof up to specification, even if those costs are higher than the original cost of installing your roof.