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Bilco GS-50 Skylight Roof Hatch


Bilco GS-50 Skylight Roof Hatch

Bilco GS-50 Skylight Roof Hatch

The Bilco GS-50 Skylight Roof Hatch provides all the security and convenience of a BILCO roof hatch with the added benefits of a skylight. Standard stock size hand an inside to inside curb measurement of 36″ x 30″. Products feature a poly-carbonate dome cover, aluminum construction, and easy one-hand operation. Type GSS and type GS roof hatch products are available in all standard roof hatch sizes and custom sizes can be supplied when specified.


  • Engineered with compression spring operators to provide smooth, easy, one-hand operation, regardless of size
  • Automatic hold-open arm locks the cover in the open position to ensure safe egress
  • Overlapping cover design, full welded corners on cover and curb, EPDM rubber gasket, and fully insulated cover and curb ensure weather-tightness and energy efficiency
  • Constructed with corrosion resistant materials to provide many years of trouble free, dependable service
  • Heavy gauge construction and positive latching mechanism maintain building security
  • Curb features the Bil-Clip® flashing system, an innovative method to quickly and easily secure single-ply roofing material to BILCO roof products
  • Type GS roof hatch and type GSS roof hatch are available in many sizes and curb configurations to satisfy any requirement or installation


  • Material: Cover and frame are 11 gauge (2.3 mm) aluminum.
  • Cover: Aluminum extrusion with built-in condensation drainage channel and clear poly-carbonate dome or double domes. Dome(s) is coated for UV-resistance.
  • Curb: 12″ (305 mm) in height with integral cap flashing, 1″ (25 mm) fiberboard insulation, fully welded at corners, and 3-1/2″ (89 mm) mounting flange with 7/16″ holes (11 mm) provided for securing frame to the roof deck.
  • Gasket: Extruded EPDM rubber gasket permanently adhered to cover.
  • Hinges: Heavy-duty pintle hinges with 3/8″ (9 mm) Type 316 stainless steel hinge pins.
  • Latch: Slam latch with interior and exterior turn handles and padlock hasps.
  • Lift Assistance: Compression spring operators enclosed in telescopic tubes. Automatic hold-open arm with grip handle release.
  • Finish: Mill finish aluminum.
  • Hardware: Engineered composite compression spring tubes and steel compression springs packed in grease.Type 316 Stainless steel hinges. All other hardware is zinc plated/chromate sealed.


Product Data Sheet

Architect Drawing


If you have any questions about the Bilco GS-50 Skylight Roof Hatch or it’s availability, please contact CRS at 1 (800) 267-2308 and ask for an E-Commerce Representative.

Please click ‘here’ for a list of all the roof hatches and accessories CRS has in stock!

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