Oficialūs aprašymai pateikiami originalo kalba (anglų).
This class includes: - roof framing works - installation of roof trusses - external insulation of roofs - laying of roof coverings - installation of insulation in roofs - waterproofing of roofs - installation of drains, eaves gutters and rainwater pipes - installation of roof lights and roof access hatches - installation of snowguards on pitched roofs - installation of roof safety equipment
This class excludes: - internal insulation of roofs, see 43.23