Attlebridge, Norfolk

Full survey, design, manufacture and installation of an apex-shaped glass extension framed with specially made structural steel ‘T’ sections jointed together, with ‘frameless’ sliding doors on a flush threshold and an electric rooflight for ventilation. The external timber cladding is carried on thermally broken brackets to avoid cold bridging.

Products used: ‘Cortizo’ sliding doors; ‘Lonsdale’ electric rooflight; structural glass double-glazed units; Dow Corning 993 structural silicone.