Moulsford Preparatory School

Moulsford Preparatory School

  • CLIENT; Moulsford School
  • STATUS; Completed Sept 2014
  • SIZE; 56 sq m (Gross internal floor area)
  • COST; £75,464 PRICE £PSM: £1,347 (Inc. Groundworks, Sedum Roof and hard landscaping)
  • ARCHITECTS; Nicholas Brown Webber


“Moulsford School with a high quality, thermally efficient, sustainable temporary building that may need to be relocated at some time in the future. It needs to have a sedum roof, blend in with the existing cedar clad buildings at the school and they would like it to be completed and ready for use by the end of the summer holidays!”

In March 2014 Timberworks Europe Ltd were contacted by Mark Webber of Nicholas Brown Webber Architects to supply Moulsford School with a high quality temporary classroom ready for use by its pupils from September 2014.


Having reviewed the plans, elevations and outline specification with our fabricators and the clients’ architects, the simple outline of the proposed structure meant that use of our modular system would deliver the most cost effective solution for the school and meet the demand of the short timescale available.

The Building

To accommodate the saturated weight of the Sedum Roof and allow for future relocation, the envelope was engineered using a bespoke SIP/Steel construction system which not only allows for the additional weight of the sedum roof but also achieves very high levels of thermal efficiency. Between the steel frame the 150mm SIP’s panels in the roof floor and walls provide u-values of 0.16w/ m2K, and the air permeability of the finished structure is estimated to be between 1 and 2 M3/m2/hr at 50pa. The building has argon filled double glazing throughout which deliver u-values of 1.2w/m2K. Externally there is a breather membrane then the final finish of stained vertical Cedar Cladding. The module was delivered fully wired, decorated and carpeted.


Planning permission for the building was granted on the 20th June 2014 and contracts signed soon after. We were ready to deliver the building in the first week of August but delivery was delayed until 19th August to accommodate summer schools. Offload was carried out using a 65t crane and the building was connected to the electricity supply and commissioned the same day. The sedum roof was installed by the 22nd August and pathways and landscaping finished a week later. All that remained was the installation of the teaching wall and furniture and everything was ready as planned for the start of the new school year. Total length of time from contracts to occupation was 10 weeks.

Energy Efficiency

As detailed above, the theoretical thermal performance of the building is exceptionally good. Being a temporary building there was no mandatory requirement for a full Energy assessment. However, having discussed the heat loss values, fenestration and likely air loss of the building with Steven O’Brien at Evergreen Living (who conducts energy assessments on all our buildings) he confidently predicted that had it been tested it is highly likely that it would have been certified with A classification. The building will be extremely cheap to run.


“We are absolutely thrilled with the building; it does everything we asked for and more. I’d be extremely happy to speak to anyone who is looking to undertake a similar project”.

John Wilder, the School Bursar and co-ordinater of the project

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