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A timber and glass entrance lobby

working details

The new entrance lobby is set at the corner of the T-shaped mill building. The construction - lightweight walls of cedar boarding and frameless glass - contrasts with the massive roughly-coursed stone walls of the older structure.

The pitched slate roof of the mill has been ex-tended down to cover the lobby, 'knitting' new to old. The roof terminates in a gentle curve which is covered with lead, jointed with timber rolls.

The timber frame structure of the lobby bridges the basement-level access to a small store. Floor joists are notched into the webs of two universal steel beams, one fixed to the stone wall of the mill and the other to a concrete upstand.

The walls are formed of 100 x 50mm treated-timber frames filled with mineral-fibre insulation and sheathed with 18mm ply. Vertical and horizontal battens are clad with 22mm vertical cedar boarding. On the inside, the walls are lined with beech-faced ply.

To give views in two directions from the lobby bench, the corner window is set at low level. It is detailed to appear as if frameless; the 8mm glass panes are fixed at top and bottom by cedar fascia boards which act as glazing beads, and at the sides by rebates in the cedar jambs. At the corner the glass is butt jointed and sealed with clear silicone.

The curve to the lobby roof is formed by curved rafters comprising three layers of curved beech-faced ply with the central ply layer recessed to form a slot. The rafters rest on a composite ply eaves beam. A simple galvanised box gutter is fitted with a carved overflow spout at the east end of the lobby.

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