There are two main types of insulated gutters used in industrial buildings and these are single skin gutters and membrane lined insulated gutters.
Single skin pre-laminated membrane insulated gutters are made from a galvanised steel section that has a polymeric membrane on the exposed side of the gutter.
Membrane lined insulated gutters, however, have an additional insulation material on the inner facing aspect of the structural galvanised steel gutter section. In some cases, depending on the specification, there may also be another surface covering the insulation material for aesthetic appeal. The entire gutter system is produced in a factory and delivered to site complete.