St James Business Centre

Dual-Pitch Rooflight Replacement – Lonsdale TG50 Patent Glazing

Scope: Replacement of Two 25m-Long Dual-Pitch Rooflights with AOVs System: Lonsdale TG50 Patent Glazing

Rooflights & Atriums was appointed to replace two ageing, 25-metre-long, structurally supported dual-pitch rooflights, incorporating new automatic opening vents (AOVs) using the Lonsdale TG50 patent glazing system.

The project involved the careful removal and replacement of the existing roof glazing with modern, high-performance double-glazed rooflights, designed to maximise natural daylight, improve thermal efficiency and provide reliable long-term weather protection.

Integrated AOVs provide essential smoke ventilation functionality, while the Lonsdale TG50 system offers a robust, aesthetically pleasing solution suited to large-scale commercial rooflight applications.

Working around the existing supporting structure, our team delivered a carefully coordinated installation, demonstrating our expertise in commercial rooflight replacement, dual-pitch patent glazing, smoke ventilation systems and large-scale glazed roof refurbishment.