This residential roof terrace required a smart, low-height decking solution that could be installed around two existing rooflights without compromising structural strength or design quality. With only 60mm of total build-up available, a traditional timber substructure was not an option. Wallbarn’s aluminium and bamboo-based system provided a clean, efficient answer.
The team opted for our low Box Rail aluminium joist, which at only 15mm high, offered the necessary strength while maintaining a minimal profile. These rails were fixed directly to Mega Balance self-levelling pedestals, allowing precise height adjustment and alignment across the full surface, even on subtle roof falls. The system’s simplicity allowed for quick layout and installation, helping to keep timelines tight and disruption low.

Atop the substructure, our Thermo Bamboo decking boards were installed — chosen for their refined finish and long-term performance. These boards are manufactured by compressing steamed bamboo fibres under high pressure, creating a dense, ultra-hard decking product that’s more stable and rot-resistant than many tropical hardwoods. The result is a decking surface that resists movement, warping, and splitting over time, even in exposed conditions.

The Thermo Bamboo boards also offer high sustainability credentials. Bamboo is one of the fastest-growing renewable materials in construction, and the thermo process enhances its strength without harsh chemicals or kiln drying. The boards are Class Bfl-s1 fire-rated, biologically Class 1 “Very Durable,” and suitable for high-footfall areas with minimal maintenance required.
With a rich brown tone that gently fades to a silver-grey patina, the finished terrace now provides a warm, natural surface that integrates beautifully with the building’s features. The deck sits flush with the rooflights and creates a functional, durable space that feels high-end yet practical. As a system, it proves how thoughtful detailing and high-quality materials can solve complex height restrictions, without compromising the overall aesthetic.