Technical Data Sheet - Roof Hatches RHTG/RHTE Type RHTG Roof hatch, glazed Type Type RHTE Roof hatch, special size Type Special RHTE wooden roofs. On higher roofs as well. Glazed roof hatches can be installed on flat roofs with a maximum pitch of 5°. Structural opening size Roof hatches are generally only suitable for concrete, steel and • The opening size of the roof hatch will match the structural opening size of the roof. • If combined with a scissor stair attic ladder, the opening size may differ please consult www.gortergroup.com for confirmation. User manual and installation instructions supplied with product. Ø10 mm Standard with 2 powerful electric motors Roof deck Roof insulation Elevated curb