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A 1960s house with living accommodation at first-fl oor level has been refurbished and extended. The large, openplan living room/kitchen is 'anchored' by a free-standing fireplace and chimney. The chimney also serves a barbecue below at ground-floor level.

The chimney stack is formed of double-skin blockwork that rises from the ground-floor slab to the coping, tied into a pair of 152 x 152mm UCs. The ground-floor barbecue has a solid cast in-situ concrete upstand as its base; the formwork, of 125mm-thick softwood boards, was sandblasted to expose the natural grain. The combustion zone is a trough in the concrete upstand, with a ventilation slot at the back and a bespoke grill rack above, resting in stainless-steel angles. Fireback and throat were cast as a single concrete element, with the flue void tapering to a pipe and a 120 x 445mm stainless-steel flue rising to one side of the stack. A hinged panel gives access to the grease trap.

The concrete hearth of the first-fl oor fireplace is flush with the timber floor and the chimney cantilevers over the 675mm-high opening, supported by a 80 x 80mm RHS frame bolted to the UCs. The stainless-steel throat leads to an insulated flue pipe. At the top, the flue openings are protected from weather by an 8mm-thick black-painted steel plate, raised above the concrete coping on 150mm angle supports.

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