Tata Steel RoofDek D100 structural roof decking was installed as part of an exciting and innovative green convex and concave curved roof construction at the new Maplefields School in Corby, built by Graham Construction for Northamptonshire County Council.
Designed by GSS Architecture, the new £15 million environmentally-friendly special school caters for pupils with learning and behavioural challenges. It comprises two buildings the main school building and a sports hall, in addition to external play areas and a full synthetic pitch.
The schools roofs feature rainwater harvesting, high levels of thermal insulation, natural ventilation, green sedum roofs and solar thermal panels. A biofuel boiler supports an underfloor heating system. The project has also benefitted from extensive hard and soft landscaping and a habitat area.
The project is best described as three interlaced extensive sedum roofs, approximately 6000m2 in total, featuring broad curved sections, convex and concave, interspersed with aluminium standing seam roofs.
Approximately 3000m of curved fascias follow the waveform rooflines. A singleply system, with tapered insulation and elliptical upstands, is installed on two atriums.
Approximately 8,000m2 of RoofDek D100 was used on the project, in 1.2mm galvanised steel (5983m2), 1.2mm Bright White perforated liner (1663m2) and 1.2mm Bright White liner (83m2).
Structural engineering calculations required that decking lengths accepted the 75kg/m2 loads generated by the sedum roofs.
Designed to accommodate the additional loadings imposed by green roof construction, RoofDek D100 features a 700mm cover width and a 233.3mm pitch.
This provides a very strong deck and offers excellent insulation support. Its lightweight construction also minimises the load on the building structure.
A glass reinforced polyester solution was selected, to match the architects requirement for smooth fascias on the rooflines, where these were curved in elevation.
Tata Steel RoofDek D100 perforated liner was installed where an acoustic performance was required on the sports hall and plant room roofs.
Standard RoofDek D100 1.2mm galvanised steel deck was installed on all other roofs. This product lends itself to the requirements of a design curved in elevation.
Where green roofs were installed, the build-up comprised of Tata Steel RoofDek D100, a vapour control layer, followed by 160mm PU insulation, then Bauder membranes, overlaid with an extensive green roof.
View Structural Roof Decking: RoofDek® Product Entry