1200 x 1350 mm Brett Martin Flat Glass Access Hatch

• Dual-Purpose Design – Combines natural daylight with secure roof access, ideal for terraces, roof gardens, and maintenance entry.
• Superior Thermal Efficiency – Achieves U-values as low as 1.72 W/m²K with argon-filled double glazing and Low-E coating, reducing heat loss and enhancing energy performance.
• Ventilation at the Touch of a Button – 24V actuator opens to 77° or 93° for controlled airflow, with optional wind and rain sensors for automated weather protection.
• Enhanced Safety and Security – Laminated inner glass prevents shattering, ensuring protection against accidental breakage and meeting non-fragility standards for added safety.
• Sleek Modern Aesthetic – Slim aluminium frame (RAL 7016) with a flush glass design enhances the look of any flat roof, blending style with functionality.

Brett Martin Flat Glass Access Hatch Rooflight

The Brett Martin Flat Glass Access Hatch Rooflight is a premium solution for modern flat roof designs, offering both functionality and elegance. Perfect for providing natural daylight and safe access to roof spaces, it’s ideal for maintenance or creating open spaces like terraces and roof gardens.

Key Features:

• Sleek Modern Design: A slimline powder-coated aluminium frame (RAL 7016) and flush-fitting glass panel create a minimalist, stylish aesthetic.
• Natural Daylight: Maximises light entry to brighten interiors.
• Roof Access: Provides effortless, safe roof access for various applications.
• Efficient Ventilation: Equipped with a 24V actuator that opens to 77° or 93° (depending on size), ensuring optimal ventilation.
• Easy Installation: Features a tapered kerb foot that eliminates the need for timber fillets, and an integral clamp holds the roofing membrane in place, simplifying the process for all roofing types.

Performance & Durability:

• Weather Adaptability: Optional wind and rain sensors for enhanced functionality.
• Thermal Efficiency: Achieves U-values as low as 1.72 W/m²K for energy efficiency.
• Built to Last: Tested to meet CWCT TN-67 Class 1 non-fragility standards and ACR[M]001 Class B non-fragility for safety and durability.
• Warranty: Backed by a 10-year warranty for peace of mind.

Whether for residential or commercial applications, the Brett Martin Flat Glass Access Hatch Rooflight combines cutting-edge design with robust performance, offering a practical and attractive solution for modern flat roofs.

Please note that all Brett Martin access hatch rooflights are made to order and therefore non-returnable, so be sure to confirm your specifications and measurements before finalising your purchase.

Download Technical Datasheet

Actuator Options:

• 24V actuator, adjustable to
  open at 77° or 93° depending on the hatch size.
• 230V AC to 24V DC
  transformer with a rocker switch.
• Optional wind and rain
  sensor for automated operation.

Frame:

• Constructed from extruded
  aluminium with a premium powder-coated finish (RAL 7016).
• Slimline design for a sleek,
  contemporary appearance.
• Thermally isolated for
  superior thermal performance.

Glass Panel:

• Flush fitting design with
  double-glazed composition.
• 6mm toughened outer pane.
• 90% argon-filled cavity.
• Laminated inner pane with
  PVB interlayer for safety.
• Soft-coat Low-E coating
  for energy efficiency.

Thermal Performance:

• U-Value: As low as 1.72
  W/m²K, ensuring excellent energy efficiency.

Applications:

• Designed for flat roof
  installations with mounting pitches between 2° and 15°.
• Minimum pitch of 2°
  required to prevent water ponding and rapid dirt build-up.

Glazing Options & Performance:

Standard Inner Pane Thickness: Varies based on rooflight size (see the Technical Datasheet for more details). Options:
6.8mm, 7.5mm, or 9.5mm laminated glass.

Light Transmission: 77% - 79%.

• Solar Energy (G-Value): 0.56 - 0.59.
• Reflection: 12%.
• Shading Coefficient: 0.64 - 0.68.

Acoustic Performance:

• Achieves 38dB (Rw) direct airborne sound insulation.

Snow and Wind Load Resistance:

• Tested to resist: Snow Loads: Up to 1200 N/m² and Wind Loads: Up to 1000 N/m².
• Not suitable for operation when snow accumulates on the top surface.

Safety Features:

• Laminated inner pane prevents falling glass in case of accidental breakage.
• Non-fragile design for enhanced safety.
• Avoid uneven heat build-up under the glass.
• If you add blinds to your access hatch, they should be light-coloured, positioned far from the glass, and allow for ventilation to reduce thermal stress. 

Standards Compliance:

• Wind load tested in accordance with BS EN 1991-1-4: 2005.
• Snow load tested as per BS EN 1873: 2005.

Installation Guide

Non-Fragility and Safety Standards

The Brett Martin Flat Glass Access Hatch meets CWCT TN-67 non-fragility for Class 1 roofs* and ACR[M]001 Class B non-fragility when installed according to Brett Martin Daylight Systems’ guidelines. Glass panels comply with BS EN12150, BS 14449, and BS 1279. Foot traffic on the rooflights should be avoided as impacts may cause damage requiring replacement.

Access Control and Security

All units come with a key-operated isolator switch to prevent unauthorised operation during access. The glazed top is secured with self-drilling security screws, concealed by color-matched cover caps. Concealed hinges and actuators with a 4kN locking force ensure the hatch can only be operated from the inside.

Fire Performance

The glass is Class A to EN13501 part 1 and complies with BROOF(t4) classification under building regulations due to its 6mm toughened outer pane. It is included in the CWFT materials list as per European Commission Decision 96/603/EC.

Wind and Snow Resistance

The access hatch is tested to withstand wind loads as per BS EN 1991-1-4: 2005 and snow loads in accordance with BS EN 1873: 2005. It is not designed for operation when snow has accumulated on the surface.

This product offers robust safety features, reliable security, and full compliance with fire and structural standards, ensuring it performs in demanding applications.

The Brett Martin Flat Glass Access Hatch is designed to remain fit for purpose under normal industrial conditions for up to 20 years. A 10-year warranty is available, ensuring the product will not perforate, lose significant structural integrity, or distort to the extent of compromising weather-tightness.

The warranty also includes:

• Electrical Actuators: Covered for 1 year, with a design life of at least 10,000 cycles.
• Insulated Glass Units: Guaranteed for 5 years.

If you find any cracks in the glass upon delivery, please contact us right away. To be eligible for a return or replacement, it is important that any damage is reported within 12 hours of delivery. Promptly informing us of any issues ensures we can resolve them quickly and efficiently.

ECONOMY NATIONWIDE SHIPPING: 10-15 Working Days