Following the success of earlier schemes at Feltwell, Burwell, Langham and Sedgeford, we were invited by Hastoe Housing Association to negotiate a further three schemes at Bressingham, Saham Toney and Great Moulton.
Before we could reach a conclusion on the third scheme at Great Moulton the market had changed and Hastoe Housing decided to go for competitive tendering.
Following the return of the tenders Hastoe Housing returned to the negotiating table to complete a deal with us.
All three schemes required Code of Sustainability Level 4 and although the original design was timber frame, we proposed and negotiated what had become our “preferred method of construction”, super insulated masonry (SIM) walls. For these three schemes the SIM walls consisted of 190mm thermalite blocks with a through colour Relius external render on 150mm Neopor insulation.
Post construction cost analysis has shown that the actual saving was 15% lower than the original tender price using timber frame.
In addition the project was complete in less time than the projected timber frame scheme and it is expected that longer term savings are achievable in lower repairs and maintenance costs.
The Bressingham development consisted of ten dwellings a mixture of semi-detached and terraced properties including two bungalows. There were ten units at Saham Toney and a further five at Great Moulton all built in a similar style and construction. Some elevations were enhanced with Eternit boarding.
At Bressingham the project had the benefit of storm water harvesting serving the w.c.’s, washing machines and outside taps. All three sites had ground source heat pumps served from individual 90m deep boreholes.
The change from what is now a familiar form of construction in timber frame to solid single skin blockwork meant there was an element of re-training and change in philosophy. This was achieved on the first scheme. The severe weather at the beginning of 2010 meant there was some managed delay but the schemes were completed within programme and
within a very stringent budget.