Bilco E-50TB - Thermally Broken Roof Hatch, 36" x 36"

The Bilco E-50TB is a 36-inch by 36-inch thermally broken roof hatch designed for ladder access. It features a brake-formed aluminum cover and frame, each insulated with approx 3″ (75 mm) polyisocyanurate insulation for improved energy performance. Its design includes a beaded, overlapping flange, fully welded corners, EPDM gasket permanently adhered to cover, stainless steel pintle hinges, slam latch with interior/exterior handles and padlock hasps, lift-assistance via compression spring operators in telescopic tubes, and an automatic hold-open arm for safe use.

Key Features:

• Thermally broken cover and curb to reduce heat transfer and prevent condensation
  
• Polyisocyanurate insulation (≈ R-18) in both cover and curb for improved thermal resistance
  
• Overlapping flange and fully welded corners ensure weathertight construction
  
• EPDM gasket permanently attached; stainless steel hinges and corrosion resistant hardware
  
• Lift assistance with compression springs plus automatic hold-open arm

• Width × Length (curb-to-curb): 36″ × 36″ (914 mm × 914 mm)
• Material: 11 gauge aluminum cover and frame
• Insulation thickness: 3″ (75 mm) polyisocyanurate in both cover and curb
• Curb height: 12″ (305 mm) with integral cap flashing; mounting flange 5-1/2″ (114 mm) with pre-drilled 7/16″ (11 mm) holes
• Live load capacity: 40 psf (195 kg/m²)
• Finish: Mill aluminum; hardware stainless steel or corrosion resistant sealed where applicable
• Includes: Roof hatch with insulated cover & curb, hardware set (hinges, latch, handles, padlock hasps), lift springs, hold-open arm

• Prepare a 36″ × 36″ roof opening and ensure curb height and structural support are correct.
• Place the E-50TB hatch over the curb, align the flange mounting holes.
• Secure the frame with fasteners through the mounting flange.
• Attach the hinges, compression spring operators, automatic hold-open arm, and latch hardware.
• Test hatch for smooth open/close motion, secure latch operation, and proper gasket seal.

Q: What is the insulation rating of the E-50TB hatch?
A: Approximately R-18 via polyisocyanurate insulation in both the cover and the curb.

Q: Is the E-50TB suitable for ladder access?
A: Yes. It is designed specifically for ladder access with hardware and features compatible for that usage.

Q: What live load rating does E-50TB support?
A: It supports a live load capacity of 40 psf.

Q: How does the hatch resist weather and condensation?
A: Through its thermally broken design, EPDM gasket, overlapping flange, welded corners, and insulated curb and cover.