Contains over 150 specifications commonly used in housing.

Typical wall, roof, floor and other constructions are listed against a simple environmental rating scale from A (good) to C (poor). Twelve environmental impacts are individually scored, together with a Summary Rating, information on recycling and typical costs.

The ratings enable you to select materials and components on their overall environmental performance over the building's life. Because ratings are also given for individual environmental issues such as climate change, you can either specify on the basis of personal or organisational preferences or priorities, or take specification decisions based on the performance of a material