What are some of the advantages of coal tar?
It’s a pretty long list, but a distinctive advantage of this system lies in its water resistant characteristics. Because of its tight molecular structure, coal tar is impervious to standing water. Koppers takes no exception to standing or “ponded” water on its warranties. Most single-ply and asphalt roofing systems will exclude this condition from coverage. In addition, this feature makes our system very price competitive when compared to other systems that require tapered insulation to provide for drainage. Coal tar roofs are very resistant to corrosive environments (i.e., animal fats, oils, greases, acid rain, alkali, mold, bacteria, etc.). This allows our products to perform in some of the harshest conditions a roof might ever become exposed to. Compare life cycle costs of roofing systems. In several independent studies, coal tar roofs have the longest average service life, except for metal. So look at a 30 year life cycle. A coal tar roof may require maintenance at the end of 20 ye
