CONTEXT 182 : DECEMBER 2024 27 HEATING & VENTILATION the flue was connected to a coal-fired furnace in the Furnace House. It went around the perimeter of the Pavilion before exiting into the thickness of the rear wall in the north corner. Although the outlet at this point was obscured, the flue must have risen within the wall to the chimney stack that still exists above. The Pavilion’s glazed timber roof had an upper vent along the ridge and openings that could be adjusted. Along with the windows, these openings allowed for ventilation and moderation of the temperature and airflow. The Furnace House itself, the engine room of the glasshouse, is built from rubble stone with sandstone dressings and uses recycled roof timbers. The coal chute survives. The archaeological excavations revealed the original cobbled surface of the Furnace House floor and the footings from the original cast-iron furnace; they form a U-shape in the cobbles and helped to determine something of its original form and scale. A representation of the furnace now occupies this original footprint. At the time of the archaeological investigations, the Pavilion was in a semi-derelict condition, worsened by heavy snowfall which had caused the roofs to collapse in 2010. Simpson and Brown carried out a series of conservation repairs to restore the glasshouse and garden walls, including repairing the timber and glass hipped roof. Historic photographs from the 1920s showed that the roof profile had been changed. When this evidence was considered alongside that of the different moulding profiles of the principal roof timbers, it was clear that it had previously been subject to major reconstruction. Roof repairs were required as a great deal of rot was encountered. These were restricted as far as possible but significant timber The pavilion roof undergoing repairs, with Abbotsford House in the background (Photo: Simpson and Brown) Excavations of the Pavilion revealing a brick-lined flue running around the internal perimeter (Photo: Addyman Archaeology) Excavating the floor of Furnace House revealed the footings of the original furnace (Photo: Addyman Archaeology)
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