It is the experience of many building owners and property managers that roofs of commercial facilities, particularly those roofs having a low slope, are a chronic problem. Nationwide statistics and historical review of building systems' performance offer plentiful testimony to this condition. It is important to point out that chronic problems with roofing systems generally stem from two conditions:
1. Of the major generic building systems - structural, mechanical and protective - the protective systems are subject to the most intense distress.