GCP Underlayments

Roofing underlayment is applied directly onto the roof deck before installing shingles, plywood, or OSB. It acts as an additional protective layer between the roof deck and the top roofing materials, providing an extra defense against moisture, ice, and wind-driven rain. This crucial layer helps prevent leaks and can significantly extend the life of your roof. Available in a variety of materials, including felt, synthetic, and rubberized options, roofing underlayment enhances durability, moisture resistance, and energy efficiency. Designed to meet specific roofing needs, these underlayment options ensure your roof remains secure, effective, and resilient against the elements.