Typically the commercial roofing contractor is licensed by the manufacturer of the materials that are used on the roof. The contractor must use the products, systems, and details required by the manufacturer’s specifications. In most cases, the roofing contractor is responsible for any labor or installation-related repairs that are required for the first two years. After that, the manufacturer is responsible for the costs of an NDL warranty.
Many manufacturers require roof inspections and minor repairs to be completed annually. Your professional roofing contractor can provide these services for you and document them for verification so that your warranty does not become null and void.