In December 2007, ASTM International's Technical Committee D08 on Roofing and Waterproofing held a technical symposium during its semiannual meeting. The symposium featured presentations of 11 peer-reviewed research papers that provide insight into research affecting the U.S. roofing industry.
"Artificial Roofing Slates and Shingles" provides a report of an investigation and testing of 11 artificial shake and slate products from nine manufacturers. The investigation involved hundreds of roof systems that were examined in more than 20 states.
The research concludes no test methods or programs accurately predict the durability of artificial roofing slates and shingles. The only appropriate indicator of the long-term performance of artificial roofing slates and shingles is historical durability of similar roof system products in a similar environment.