Coal Tar Pitch Roofing Details

Science and technology 2001.

Coal tar pitch roofing details.

It may be used in combination with ultraviolet light therapy. Industrially it is a railway tie preservative and used in the surfacing of roads. Type ii coal tar pitch is intended for below grade waterproofing applications. It is used as a base for coatings and paint in roofing and paving and as a binder in asphalt products.

A coal tar roofing system represents the industry s premier built up roof membrane assembly. Coal tar pitch is melted on site in an industrial kettle and applied to the roof as a hot liquid. 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. Cash in encyclopedia of materials.

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. 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. Coal tar is considered the product of choice for roofs which have ponding water due to its superior ability to withstand extended exposure to water. Medicinally it is a topical medication applied to skin to treat psoriasis and seborrheic dermatitis dandruff.

Coal tar pitch is a thick black liquid that remains after the distillation of coal tar. Coal tar is a thick dark liquid which is a by product of the production of coke and coal gas from coal. 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. Type i coal tar pitch is intended for use in built up roof membrane construction.

It is solid for all practical purposes at room temperature. It has both medical and industrial uses. Bituminous roofing hits the market back in the pre world war ii years there were two bituminous substances bitumens that dominated the roofing industry. The traditional coal tar built up roof is one of the most reliable and longest lasting low slope commercial flat roofing systems available.

Coal tar pitch membranes using coal tar saturated organic felts is one of the oldest systems listed in table 2 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. Both coal tar and coal tar pitch contain many chemical compounds including carcinogens such as benzene. Historically coal tar pitch was used as a component on the first sealed roads has served as a heating element and was used to manufacture paints synthetic dyes and.