Most insurance companies will replace damaged items and materials with the same type and quality of materials you had before the damage occurred. For example, if you had a fiberglass roof, they will pay to repair or replace damage with fiberglass materials — but they will not pay to replace it with a more expensive roofing material.

If damage is extensive, people will sometimes decide to take the opportunity to upgrade their property with better, more era appropriate, or more expensive materials. Remember, the insurance company will only pay to replace materials of a comparable kind and quality. If you want to pay the additional expense to upgrade, you’re welcome to do so but it will come out of your personal budget.
On a personal note:  Any time you do decide to make improvements to your property, be sure to talk to your agent to insure that you have enough insurance for the future and to determine if you are eligible for any discounts.