Roof hatches in special sizes are, like other RHT roof hatches, made of light-weight aluminium and have a fully thermally broken curb and cover, and a proven high insulation value; Uw ≤ 0,319 W/(m².K).
The roof hatches provide a practical and safe access to flat roofs for maintenance work, but can also be used as a hatch for hoisting materials into the building. The roof hatches can be installed on flat roofs with a maximum slope of 30°.
With customised roof hatches, the longest side of the curb is always the hinged side. The following applies in respect of the sizes:
Read more about the advantages of Gorter roof hatches here