The glasshouse and pergola face south-east and take the form of a gentle curve on plan, flanked by a continuous protective wall of rendered blockwork. This supports the steel structure of the glasshouse, retains the adjacent drive and provides thermal mass.
The glasshouse and pergola are supported by a series of 171 x 178mm T-shaped beams welded at the front to 89mmdiameter CHS columns, and at the back to short lozengeshaped columns that raise the roof above the rear wall.
The columns are formed of two 63mm-diameter CHSs welded together with steel plates; the shape provides the stiffness required to cope with wind loading. Each column rests on a triangular base plate, shaped to cater for the different positions of the beams.
The glasshouse roof is made of 12mm toughened glass panes - 2.4m wide - the largest standard size available. The roof, together with CHS rods welded between the front columns and the walls, provides cross-bracing.
The front wall of the glasshouse is formed of 12mm toughened glass panes fixed to angles concealed below the flagstones. They are faceted to form the curved wall and offset to introduce a tall, narrow ventilation slot between each pane. Each slot is fitted with a glass vent hinged to the adjacent column and operated electronically.