There are different warranty types and lengths available. These include: "No Dollar Limit" (NDL), Non Pro-Rated, total system, material, workmanship and material, and single source warranty. These are all very different and each comes with a varying degree of exclusions. Before evaluating warranties, a buyer mist first consider who has authorized the warranty and keep in mind that the warranty can be written to benefit the warrantor. A buyer then must consider the exclusions that are written into each warranty and determine if these exclusions are acceptable. If a customer is not happy with the exclusions then they must request changes or riders to the warranty.

• No Dollar Limit refers to the fact that warranty coverage is not restricted to the original purchase price and allows for price
   increases due to inflation and other cost factors. This is seldom exercised due to the need for catastrophic failure to occur in
   conjunction with increased roofing prices.
• A warranty that holds its value throughout the life of the warranty term is the Non Pro-Rated Warranty. It is not discounted as the    roof ages and the warranty holds the same value in the first year of the warranted term as it does in the last year.
• Warranties that cover every aspect of the roof system are Total System Warranties. These vary from material warranties that
   may only cover replacement materials and not the labor to install the new material.
• A single source warranty is structured in a way in which there is one party responsible for both the workmanship and material of
   the entire system This covers all aspects of the roof system and the related workmanship required to make any needed repairs.

    Lastly, a buyer should determine what it is they would like to accomplish with the warranty. They must take into consideration the reasons why their previous roof failed, how long the building will be owned, what the present and future use of the building is and will be, and who will cover potential future needs.
Note: all roofs leak. It is important that a buyer determines whether he wants to have the original installer (who is most familiar with the roof) to do the repair work.