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Park Avenue South, London by Studio Octopi

[VIDEO + DESIGN DETAILS] This kitchen extension – clad in black zinc, with standing seams tracing a path across the roof – was defined by the geometry of the main house

Two solid doors lead onto granite terraces – the larger door weighs 300kg. The open-plan space is divided by a long work bench clad in mitred Assaluto Nero granite. A step down into the kitchen allows this bench to form a counter top and cantilevered table. The white ash floorboards and white facets of the ceiling form a bright lining to the dark outer-shell. The planes of the extension shift and tilt, alternating with triangular roof lights that frame views of the trees and chimney-pots beyond.
Cost: £246,000

 

Architect’s description of roof detail

This extension uses a lightweight steel frame to form a faceted surface for the glass and zinc roof. The setting-out of the steel frame was immensely complex, given the angles and twists of every beam. By digitising a simple plywood model we produced detailed setting-out drawings for Famella, the main contractor. The secondary timber structure allows for the roof and walls to be ‘super-insulated’, offsetting the large area of glazing. All double glazed units have low e-coating, to provide an element of solar shading. Internally, a tertiary timber structure was used to set out internal plasterboard ceilings. With Roles Broderick Roofing and Famella, we modified traditional zinc details to allow standing seams to track up the walls and across the pitch and fall of the roof. Careful detailing at the heads and sills of the doors enabled us to incorporate drip details within the face of the cladding, allowing doors to sit flush with the external walls. Specifying VM Zinc removed the need for a ventilation zone- the zinc tucks over the aluminium glazing support angles. The matt black spacer within the glazing unit was then lined through with the internal finishes.

James Lowe, director, Studio Octopi

 

 

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