Purpose:
It is a type of building material primarily used for waterproofing and damp proofing, especially in roofing applications.
Composition:
It consists of a fiber mat (polyester or glass fibers) saturated with bitumen, a sticky, black, semi-solid form of petroleum.
Application:
It is typically applied in layers using hot asphalt or tar to create a watertight seal, effectively protecting roofs, walls, and other structures from water damage and preventing dampness and condensation.
Benefits:
Bituminous felt is known for its weatherproofing capabilities, durability, and cost-effectiveness compared to some other roofing underlayments.