Pitch And Tar Roof

Typical coal tar pitch built up roofs have four or five plies.

Pitch and tar roof.

Bituminous roofing hits the market back in the pre world war ii years there were two bituminous substances bitumens that dominated the roofing industry. Roofing tar is often used for tar and gravel roofs or to fix leaks on a roof. Built up roofs or burs also called a tar and gravel roof is a well established and popular style of flat roof that is made up of alternating layers of roofing felt or fiberglass and asphalt that is applied with heat which combine to make a long lasting sturdy roofing system. Coal tar pitch is a thick black liquid that remains after the distillation of coal tar.

Pitch impregnated roofing felts are installed in overlapping courses during the application in order to strengthen the resulting roof membrane. At the end of the installation gravel is typically set into an additional surface layer of hot coal tar pitch called a flood coat to provide fire resistance and protection from uv rays foot traffic and hail. A layer of felt and coal tar pitch is called a ply. How are people exposed to coal tar and coal tar pitch.

You can expect to pay 2 50 to 4 00 per sq. Roofing tar is a good choice for a flat roof as this kind of material is highly resistant to the ultraviolet rays from the sun. The average roofing installation price for a tar gravel built up roof costs anywhere between 3 750 to 6 750 depending on the slope pitch and size of your roof. Both coal tar and coal tar pitch contain many chemical compounds including carcinogens such as benzene.

It is used as a base for coatings and paint in roofing and paving and as a binder in asphalt products. Coal tar pitch was a by product of processing coal to make coke which in turn was used in making carbon steel and electrodes for the aluminum industry. Pros and cons of roofing tar.