threshers-frame

About Us

Engineered without compromise

Unrivalled Scale and Performance

The Big Rooflight system combines architectural ambition with technical integrity. Every panel undergoes mechanical engineering verification by our glass engineers to ensure compliance with building regulations and the highest standards of safety and performance.

All glazing is manufactured under GGF guidelines, ensuring every panel is free from internal imperfections that could lead to spontaneous breakage.

Glass options include:

  • Low-Iron Glass for maximum clarity and colour neutrality
  • Triple Glazing for exceptional thermal performance (U-value: 0.7 W/m²K)
  • Double Glazing with system value of 1.0 W/m²K for lighter, efficient builds
  • Low-E Glass standard for insulation and comfort
  • Solar Control Glass available for bright or exposed environments, reducing solar gain to 35%

Engineered Beauty.

Our systems are as intelligent as they are beautiful. Every frame is thermally broken to eliminate cold bridging, ensuring comfort and efficiency year-round. Each design is tailored, tested, and beautifully resolved engineered to be a statement of clarity and craft. We provide:

Fixed Rooflights – Large-format, laminated safety glass as standard for protection and peace of mind.
Shaped & Circular Rooflights – Unique geometries crafted to order, with precision-shaped framing.
Walk-On Rooflights – Up to 6m x 3.2m, with anti-slip surface options and laminated protection.
Opening Rooflights – Up to 6m x 3.2m, opening up to 300mm for ventilation, or configured for 90 degree access in smaller spans.

Our Process

Our process is as collaborative as it is technical. From the first enquiry, clients can use our interactive specification system to explore design options, request bespoke features, and generate tailored pricing.

  • Behind every project, our technical team works closely with architects and builders to refine details, validate performance, and ensure flawless integration.
  • Each rooflight is then produced, tested, and delivered to exacting standards, creating a finished installation that performs as beautifully as it looks.
  • For us, the journey is as important as the result: a transparent, collaborative process built around trust, craft, and architectural excellence