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Bilco NB-50VM VersaMount Hatch


Allow 2-3 weeks for delivery

Bilco NB-50VM VersaMount Hatch

The Bilco NB-50VM VersaMount Hatch allows you to replace a damaged roof hatch without re-roofing. The low-profile VersaMount curb features a built-in flange and apron and innovative anchor clip system to ensure a fast, secure, and weather-tight installation over an existing curb.


  • For installation on an exiting curb with rough opening of 30″ x 54″
  • Built-in apron simplifies installation on existing curbs and ensures water-tightness
  • 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


  • Cover and Frame: 11 gauge (2.3 mm) aluminum
  • Cover: Brakeformed, hollow-metal design with 1″ (25 mm) concealed fiberglass insulation, 3″ (76 mm) beaded, overlapping flange, fully welded at corners, and internally reinforced for 40 psf (195 kg/m2) live load.
  • Curb: 4″ (102mm) in height, breakformed hollow-metal design with 1″ (25 mm) concealed fiberglass insulation, 2-5/8″ (67 mm) mounting flange and 1-1/2″ (38 mm) apron, fully welded at corners. Stainless steel anchor clips are included.
  • Gasket: Extruded EPDM rubber gasket permanently adhered to the 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: Aluminum Mill Finish
  • 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.

**Turnaround time on the Bilco NB-50VM VersaMount Hatch is 2-3 weeks**


Architect Drawing


Installation Instructions

Product Video:

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If you have any questions about this item or would like special pricing for bulk orders or custom sizes, please call Commercial Roofing Specialties at 1-(800) 267-2308 and ask for an E-Commerce Representative.


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