Tarpaper, also known as roofing felt, is a type of material made from a heavy-duty paper saturated with asphalt. It is commonly used in roofing applications to protect the roofing system from water damage. Other synonyms for tarpaper include roofing underlayment, roofing membrane, and asphalt paper. Additionally, some regions may refer to tarpaper as tar paper or felt paper. Tarpaper is a crucial component in ensuring the longevity and durability of a roofing system. It is typically installed under roofing tiles or shingles and acts as a moisture barrier, providing an added layer of protection against water infiltration.