The answer to 'underlayment warranty' is that the typical warranty for roof underlayment is 10-30 years, depending on the specific product. Underlayment is the water-resistant barrier installed beneath the roof shingles or tiles. Its primary purpose is to provide an extra layer of protection against leaks and moisture damage. Higher-quality underlayment products often come with longer warranties, such as 20-30 years, while basic underlayment may have a 10-year warranty.
The warranty covers the material itself, ensuring it will not fail prematurely due to manufacturing defects or normal wear and tear. It does not cover damage caused by improper installation, severe weather, or other external factors. Following the manufacturer's installation instructions carefully is crucial to getting the full warranty coverage.