Glazing:Layout 1 01/07/2009 16:11 Page 73
glazing
Window dressing
A thermographic survey monitors progress.
Improving thermal performance
S
TIRLING University campus enjoys a manufacture. NorDan produced 2,000 high allowing easy cleaning of the external glass
spectacular setting, taking in a performance tilt and turn windows and fixed from inside the building. The building now
loch, golf course and 18th Century lights. D+B’s cladding system integrates benefits from NorDan’s whole-window U-
castle. So when its principal building, a the windows at the design stage for a value of 1.4 W/m2K, which offers a
mid-1960s concrete structure, was due weathertight result that doesn’t rely on substantial improvement in heat loss terms.
for refurbishment, aesthetics was a ‘limited life’ elements such as sealants The aluminium cladding protects the
priority equal in importance to improving and silicon to ensure performance. timber in the windows from the external
the thermal performance of the facility. environment, making the frames virtually
D&B Facades undertook the £3.9m No disruption maintenance-free. While aluminium as a
refurbishment of Stirling’s Cottrell During the course of the refurbishment, material can negatively affect a project’s
Building, which involved installing its the full new envelope including the ‘green’ rating due to the relatively high
external insulated aluminium rainscreen windows was built outside face of the energy use involved in production, NorDan
cladding system and replacing the existing building before the old windows manufactures its windows and cladding
existing single glazing. As the University’s were removed from the inside, which took at its factory in Norway, which is powered
facilities department was particularly place outside normal hours of occupation. by hydroelectricity to minimise the
interested in improving the building’s This approach meant the existing internal embodied energy of its products. This
thermal performance, a thermographic environment was at all times approach combines the practical benefits
survey was commissioned to monitor weathertight, allowing uninterrupted use of aluminium with a reduced
improvements as the work progressed. of the building and creating minimal environmental impact.
Specified for the project, NorDan disturbance for the university.
windows appealed in part due to their eco The tilt and turn window design opens
www.dbfacades.com
credentials – being from a sustainable inwards around 100mm in the tilt position
source, with a low carbon footprint and to give draught-free ventilation. In the
with recycling prioritised in their turn position it opens inwards completely,
www.nordan.co.uk
edbmagazine.co.uk 73
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