Monday, 31 March 2014

Sliding glass roof light: case study

We were approached by Kier's, one of the UK's leading building contractors, for specification and design assistance for a specialist roof light requirement, for an exciting design and build project. "The Incubator" is the flagship building of Alconbury Enterprise Campus located on the former airfield, which is being transformed into a new high quality, low carbon Alconbury Weald development.

Designed by internationally renowned architects Allford Hall Monaghan Morris, the building will provide flexible inspiring space for small and start-up businesses, at the heart of the Alconbury Weald development. The building features a four-storey tower that both announces the site and offers a bird’s eye view across the emerging master plan from a roof terrace.

The Incubator Building - photo courtesy of Allford Hall Monaghan Morris

We provided detailed specification and design advice to Kier, for the roof top access to the viewing platform. A spiral staircase leads up to the roof terrace, and so we helped develop Kier's idea of a large sliding glass rooflight to provide comfortable roof top access.

Sliding over fixed rooflight for elegant staircase roof access.

The roof light needed to offer both excellent thermal performance and air tightness to comply with the high quality/low carbon design criteria for the building. We could offer Kier's complete peace of mind, as our PR60 roof glazing system (PDF brochure) is tested, certified and CE marked to EN 13830 for:
  • Water tightness against driving rain: EN 12154 / EN 12155 / RE 1950
  • Airtightness: EN 12152 / EN 12153 / AE 1950 Pa
  • Resistance to wind load: EN 13116 / EN 12179 / 2000 Pa permissible load & 3000 Pa increased load.
  • Verified heat transfer coefficient  of the installed system (Um/t) of 0.72 - 1.3 W/m2K*
  • Surface temperature factor fRSi of 0.66 - 0.83*
* = depending on glazing thickness.

Our team of expert roof glazing technicians developed the initial concept design into a set of full approval drawings within 7 working days. We designed a sliding over fixed rooflight to suit the 2.625 x 3.076m structural roof opening.

Once we obtained drawing approval, we manufactured and delivered the bespoke sliding roof access rooflight in under 8 weeks, and installed in just 2 days!!

Do you have a project that would benefit from our rooflight expertise? Call us TODAY for a free consultation: 01284 749051 or email:

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