What is the Full Form of T&G ?

Tar and Gravel - Tar and gravel, also known as constructed-up roofing (BUR), is a famous roofing device that has been used for greater than 100 years. This machine includes more than one layers of substances which can be adhered collectively to create a water resistant membrane. It is a price-powerful roofing choice that gives first-rate sturdiness and may last as long as 25 years with right preservation.

The tar and gravel roofing system has been used for greater than a century, and it has advanced over time. The machine became at the beginning evolved in the early 1900s and changed into used to water-proof roofs on business and commercial buildings. At the time, the materials used blanketed tar, felt, and gravel.

Tar and gravel roofing machine consisted of three layers of felt that had been saturated with hot tar and then covered with a layer of gravel. The gravel was used to shield the roof from the sun's UV rays and to offer a durable surface for foot visitors.

The substances used inside the tar and gravel roofing machine have modified through the years, but the primary components stay the identical. The system generally includes four layers:

• The substrate: This is the bottom layer of the roof, which can be manufactured from wooden, concrete, or other substances. The substrate provides a solid foundation for the roof and helps to distribute the load of the roofing substances.
• The insulation layer: This layer is commonly fabricated from inflexible foam insulation or fiberglass. The insulation layer enables to enhance the strength performance of the constructing by using decreasing warmth loss and advantage thru the roof.
• The membrane layer: This layer is the water-resistant barrier that prevents water from penetrating the roof. The membrane layer is normally product of more than one layers of felt, fiberglass, or modified bitumen which can be adhered collectively with hot tar or asphalt.
• The floor layer: This layer is generally manufactured from gravel, which is used to defend the roof from the sun's UV rays and to offer a durable surface for foot traffic. Other surface substances together with pavers, tiles, or other coatings can also be used.