The main element of the new building is a 17 x 11 x 7m display space, flanked on three sides by lower, ancillary spaces and lit by three rooflights and a full-height window on the south wall. The display space has a 'table' structure - two rows of four 300 x 300mm cast-in situ concrete columns supporting a concrete roof with a ribbed soffit - enclosed within block walls clad with cedar boarding and insulated acrylic render.
The structure is braced with a 200mm-thick x 975mm-deep concrete ring beam.
Apart from the window and the glazed main entrance on the south wall, the south and east walls are additionally clad with a series of vertical 150 x 50mm timber fins set at random spacing to respond to the woodland setting. The fins are made of Thermowood, a timber product which is heattreated to improve durability.
The fin-support system is a series of 200 x 250mm steel plates with projecting T-shaped steel brackets welded to them and bolted to the concrete ring beam. The brackets support a continuous 205mm-deep T-shaped steel beam.
Each fin is 3,600mm high with a 50mm steel T-shaped stiffener set into the rear edge.
At the base, the stiffener extends beyond the fin into the gravel base to stabilise it laterally.
At the top, a slotted steel plate is welded to the stiffener, so the fins can be slotted over the T-shaped beam at random.