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Equipment Access Roof Hatch Type D-50T Product Image
Equipment Access Roof Hatch
D-50T custom sizes

The Type D-50T Roof Access Hatch provides a convenient way to install or remove large pieces of equipment from a building via the roof. Our D-50T Roof Access Hatches are Aluminium constructed and custom fabricated to meet specific size requirements.


Features / Benefits

The thermally enhanced design of the D-50T Roof Access Hatch features special gasketing and increased insulation for superior energy efficiency and performance. 

Products are tested and approved to BS EN standards for weathertightness, sound rating and security.

Engineered with compression spring operators to provide smooth, easy, one-hand operation, regardless of size. BILCO hatches meet the requirements of Manual Handling Regulations.

Automatic hold-open arm locks the cover in the open position to ensure safe egress. Grip handle allows for easy, one-hand release and closing.

Overlapping cover design, fully welded corners on cover and curb, closed-cell EPDM rubber gasket, and fully insulated cover and curb ensure weathertightness and energy efficiency.

Constructed from aluminium 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.

Available in many sizes and curb configurations to satisfy any access requirement or installation.

Performance Standards D-50T

U-VALUE 0.278 W/m²K (homogeneous)
1.39 W/m²K (Developed Area)
BS EN 12207:2000 Air Permeability 4.83 m³/hour/m² at 600Pa
BS EN 12208:2000 Water Tightness Class 9A
BS EN 12210:2000 Wind Resistance Class E2400
BS EN 1991-1 Snow Load 1200 Pa for 1 hour
BS 8200 Impact Resistance Pass
BS EN ISO 140 Acoustic 25dB
BS EN 1627-1630 Security Pass
Wind Speed With Open Cover 30 m/s

Guide Specification D-50T

MATERIALCover and frame are 2.3mm Aluminium
Cover50mm polyisocyanurate insulation fully covered and protected by an aluminium liner.Reinforced for 195 kg/m² live load.
Curb305mm in height and of 2.3mm aluminium. The curb shall be formed with a 114mm flange with 11mm holes provided for securing to the roof. The curb shall be equipped with an integral metal capflashing of the same gauge and material as the curb, fully welded at the corners, that features the BilClip flashing system.
GASKETExtruded EPDM rubber gasket permanently adhered to cover. Air leakage performance 4.83m³/hr/m² @ 600Pa Tested to BS EN 12207: 2000
HINGESHeavy-duty pintle hinges.
Latch2 point spring latch with interior and exterior turn handles and padlock hasps.
Lift AssistanceCompression spring operators enclosed in telescopic tubes. Automatic hold-open arm with grip handle release.
FinishMill finish Aluminium
HARDWAREPlated steel compression spring tubes shall be anti-corrosive composite material and all other hardware shall be zinc plated and chromate sealed.

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