The review highlights the types of materials that are predominant in the project so that alternatives can be considered where possible Generally materials which are dense / heavy, materials that have been heavily processed and materials that have been transported long distances have high embodied energy
Additionally, some materials contain or are manufactured using substances which are toxic. PVC is an often quoted example. Alternative materials should be of lower embodied energy, or when limited choice / option is available high embodied materials should be used as efficiently as possible; the use of concrete soffits (structural and fireproof) for thermal mass is a prime example.
