Coal Tar Pitch Roof

Built up roofing in which coal tar pitch forms the waterproofing component of the roof membrane.

Coal tar pitch roof.

Koppers was one brand another one was allied signal. Due to its resistance to ponded water oxidation chemical attack and its cold flow self healing properties coal tar pitch built up roofing systems typically require little maintenance. Roofing systems originally consisted of alternate layers of hot bitumen and reinforcement. Coal tar s unique molecular structure provides a system that resists water and vapor penetration insect damage chemical attack uv exposure and most elements considered common enemies to other roof membrane systems.

They actually made a pitch modified but it didn t sell well from what i heard. Asphalt a by product of processing petroleum to make gasoline fuel oil and various hydrocarbon polymers was also popular. Construction definition coal tar pitch roofing. Coal tar pitch is a thick black liquid that remains after the distillation of coal tar.

History of coal tar roof systems. It is used as a base for coatings and paint in roofing and paving and as a binder in asphalt products. These systems perform very well historically but are limited to very low slope applications and must be gravel surfaced because of the low viscosity of coal tar pitch at normal rooftop temperatures. Both coal tar and coal tar pitch contain many chemical compounds including carcinogens such as benzene.

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. That make a coal tar based mastic. A waterproofing material used since the beginning of time coal tar pitch is a superior and sustainable raw material that is ideal for use within a roofing membrane system. A coal tar roofing system represents the industry s premier built up roof membrane assembly.

2 9 coal tar pitch built up roofing. However to get the most out of your roof a routine audit is recommended in order to detect problems due to wear and tear abuse or unusual acts of nature. Coal tar pitch is produced by distilling or heat treating coal tar which is a by product of the production of coke or coal gas. Coal tar pitch roofing is particularly pungent and contains a slew of harmful chemical compounds asphalt roofing is relatively benign compared with pitch.

These include carcinogens such as benzene and polycyclic aromatic hydrocarbons pahs. Coal tar pitch roofing in the processing of coal to make coke for steel making volatile compounds are collected from the coking ovens condensed and separated and become the base of hundreds of raw materials including dyes plastics and a byproduct called coal tar pitch. It is solid for all practical purposes at room temperature.