Felt is a rolled material comprised of a base of natural materials (e.g., wood cellulose) or synthetic materials such as fiberglass or polyester.  The felt is then saturated with a protective coating such as asphalt which repels water while allowing the product to breathe. Felt tends to be heavier but provides varying vapor permeance depending on exposure to moisture. Moisture management is a critical aspect of protecting your home. We also offer high-quality barriers/building protection materials including roofing and sidewall products used on homes throughout the New England area and east coast. Contact us to learn more about the various barrier protection products we stock.