Warranty is a strong selling point for quartz countertops since it is a promise to offer service, repair, replace, or even provide a refund. Quartz manufacturers offer different warranty coverage and it is important to be aware of the differences between them. Some quartz manufacturers offer 15-year, 25-year, and even lifetime warranties. However, you will need to be aware of the warranty exclusions of what is not covered. Make sure you read and understand the warranty.