The Partners in Innovation (PiI) Project was started in September 2001 with the objective of establishing the factors which determined the successful performance of cold and warm pitched roofs. Most of the research was based on cold pitched roofs due to a number of complex and controversial issues surround cold roofs and a number of other countries had carried out research on warm roofs.
The attached summary will give you an overview of the issues researched and the findings of the report.