The correct answer is D. Bitumen felt is a water-resistant material made from bitumen and hessian fibers. It is used as a waterproofing and damp proofing material.
Bitumen is a sticky, black, or brown liquid or semi-solid form of petroleum. It is a mixture of hydrocarbons that is found in natural deposits or can be made from petroleum. Bitumen is used in a variety of products, including roofing, road construction, and adhesives.
Hessian is a coarse, plain-woven fabric made from flax or hemp. It is often used as a backing material for carpets and other textiles. Hessian is also used in construction as a reinforcement material for concrete and plaster.
Bitumen felt is made by combining bitumen and hessian fibers. The bitumen coats the hessian fibers, creating a water-resistant material. Bitumen felt is used as a waterproofing material for roofs, walls, and floors. It is also used as a damp proofing material to prevent moisture from seeping into buildings.
Bitumen felt is a durable and effective material that is easy to install. It is a cost-effective solution for waterproofing and damp proofing.