Bilco S-50TB - Thermally Broken Aluminum Roof Hatch, 36" x 30"

The Bilco S-50TB is a 36-inch by 30-inch thermally broken roof hatch designed for ladder access. It features an aluminum cover and frame, with 3″ (75 mm) polyisocyanurate insulation in the cover and curb providing R-20 performance. The hatch includes a beaded overlapping flange, fully welded corners, EPDM gasket, stainless steel pintle hinges, slam latches with interior/exterior handles and padlock hasps, compression spring lift assistance, and an automatic hold-open arm.

Key Features:

• Thermally broken cover and curb to resist condensation and reduce heat transfer
  
• R-20 insulation in both cover and curb for superior energy efficiency
  
• 11 gauge aluminum cover/frame with fully welded corners for structural integrity
  
• EPDM gasket permanently adhered to cover to maintain weather tightness
  
• Lift assist with compression springs, hold-open arm, stainless hardware with slam latch

• Size (curb-to-curb): 36″ × 30″ (914 mm × 762 mm)
• Material: 11 gauge (2.3 mm) aluminum cover and frame
• Insulation: 3″ (75 mm) polyisocyanurate in cover and curb
• Curb height: 12″ (305 mm), with integral cap flashing and 5-1/2″ (114 mm) mounting flange with pre-drilled holes
• Live load capacity: 40 psf (195 kg/m²)
• Hardware: Type 316 stainless steel hinge pins; zinc plated/chromate sealed other hardware; slam latch with padlock provisions
• Finish: Mill finish aluminum
• Includes: Roof hatch with cover & curb, gasket, lift hardware, hold-open arm, slam latch handles

• Prepare roof opening of 36″ × 30″ with structural support and curb of required height.
• Position S-50TB hatch over curb, align mounting flange holes.
• Secure the frame using the pre-drilled flange holes and appropriate fasteners.
• Install hardware: hinges, lift springs, hold-open arm, and latches.
• Test hatch operation: opening, closing, gasket seal, latch engagement and lift assist.

Q: What is the R-value of the S-50TB insulation?
A: It is approximately R-20 using polyisocyanurate insulation in both cover and curb.

Q: Is this model suitable for ladder access?
A: Yes. It is designed for ladder access with durable hardware and safety features.

Q: What materials are used in hinges and latch hardware?
A: Hinges use Type 316 stainless steel hinge pins; other hardware is zinc plated and chromate sealed.

Q: Does this model resist weather and condensation?
A: Yes. Thermally broken design, EPDM gasketing, welded corners, and overlapping flange help prevent water and heat transfer.