New NHBC Technical Guidance has been published for those working with Roof Cassette Systems.
NHBC has published Technical Guidance 7.2/31 Roof Cassette Systems (Prefabricated Roof Panel Systems). The guidance sets out NHBC's requirements for roof cassettes, which has been defined as: Building systems consisting of prefabricated pitched roof panels which may also be supplied with prefabricated wall and floor panels, beams and other supporting elements of structure Roof, wall and floor panels may be either open or closed panel Roof cassette systems may be constructed from timber, metal or structural insulated panels (SIP) or any combination of these materials. The guidance can be viewed here.