Celotex Leeds CollegeSustainability is a key feature of the £30 million Goodricke College which forms part of the £750 million development of the Heslington East campus at the University of York. With this significant investment set to prepare the university for the future, and materials chosen to meet the development’s high performance criteria as efficiently and effectively as possible, PIR insulation from Celotex was specified to create a thermally efficient building envelope.

Designed by architects BDP and built by Shepherd Construction, the 16,000m2 college has incorporated a range of energy saving measures such as high performance insulation to achieve a BREEAM ‘excellent’ rating. To aid with this, Celotex provided its innovative EL3000 insulation board, specially designed for use in flat roofing applications.

For six campus buildings, specialist contactor Roofdec Ltd of Rotherham installed 7,500m2 of 100mm thick Celotex EL3000 boards onto a vapour barrier which was adhered to the roof’s metal structural decks. The built up flat roofing system was then finished with Sarnafil G410-ELF single ply membrane, attached directly to the surface of the insulation boards to create a thermally efficient bonded roofing system.

Celotex EL3000 has an excellent lambda value and with a glass tissue facer which is perforated on one side, it removes the requirement for a two layer solution and is suitable for either bituminous or single-ply roofing. It provides a quick and easy method of achieving effective thermal insulation in flat roofing structures and does not allow a build-up of moisture below the waterproofing membrane.

Alongside its U-value, which lowers heating requirements and thereby CO2 emissions, Celotex EL3000 has low Global Warming Potential and zero Ozone Depletion Potential. Available in a range of thicknesses from 50mm – 150mm and in two different length of boards – 600mm and 2,400mm – it is versatile and easy to cut to shape on site, providing Roofdec with an easy method of constructing the roof.

Celotex insulation is incredibly durable, dimensionally stable and unaffected by temperature cycles. It also does not corrode or degrade on contact with welding chemicals used in conjunction with many flat roofing systems.

With Phase 1 and 2 of the development now complete, this project demonstrates the versatility of Celotex’ products – and with flat roof applications well established in the UK building industry, the company’s portfolio of solutions offers specifiers and installers thermally efficient, simple and cost effective methods of insulating such rooftops.