Priory Barn features in Build It News South East
Event: Build It Live South East
Dates: 3-4 February 2018
Location: Kent Event Centre
Featured Project: Priory Barn, Lewes, East Sussex
Our new build house Priory Barn in Lewes has been featured in the Build It News South East magazine. The magazine provides further information on this weekends show in Kent.
For further details on both the magazine and the show please click here.
This new 121m2 three-bedroom, two-storey dwelling replaced a single storey storage structure on an extremely tight and ancient site in Lewes, East Sussex with demanding technical and planning constraints. It was carried out for repeat clients but unlike their previous briefs, this project was carried out as a speculative development and so the financial parameters were also heavily constricted. The result is a very compact design with some innovative features to overcome the front and rear facing overlooking issues and excellent attention to detail. Despite its compactness, it has been complimented for the light and open feel and by making the new footprint smaller than the original, a discrete rear garden space was created. Thanks to the enlightened approach of the Clients, the integrated photovoltaic roof was kept in the build and along with a thermally efficient envelope this should help afford the future occupants something close to cost neutral energy bills and near carbon neutral performance.
BBM’s approach to the energy strategy was to exploit the ‘solar aperture’, which for a tight urban plot was surprisingly open. An early decision was to rotate the ridge line 90º to that of the original structure to suit a photovoltaic roof (rated 2.4kW peak). Unusually for a speculative residential project the PV BBM managed to retain an ‘integrated’ system which was far more suited to the visually sensitive setting off Southover High Street. Passive solar gains were also built-in by including generously sized glazing on the southern façade. To protect against overheating the first floor ribbon windows were set back within a deep reveal to catch the low angle winter sun but provide shade from the high angle summer sun. A pergola does a similar job for the ground floor windows.
Knowing that this was a speculative project, BBM had to work hard on the external envelope to deliver a thermally efficient solution for a commercially realistic build rate. The following u-values were achieved for the key elements: Ground bearing slab: 0.11 W/m2K, External walls: 0.15 W/m2K and Roof: 0.11 W/m2K.