
Throughout Florida and Georgia, roofs get covered with fungus, algae and mold. This has been a problem for property owners for decades. In the late 1960's, Joseph Heffernan and his staff of research scientists started the task of developing two formulas that would clean and protect asphalt - fiberglass shingle roofs effectively and safely. They knew that the conventional method of cleaning with chlorine would cause rapid shingle deterioration and brittleness.