General comment The LCI and LCIA results in this EPD relates to a functional unit of 1 m2 installed Derbigum NT bitumen roof waterproofing system, consisting of a 4 mm layer, which is complimented by an additional 3 mm layer after 40 years to maintain its waterproofing function during the study period of 60 years. The functional unit is defined as: “1 m2 installed roof waterproofing, from cradle-to-grave, with activities needed for a study period of 60 years for the building.” |