Steam Engine House, Mill Number Three, New Lanark

1816; Engine House 1881. 3-storey (4 to rear), 10-bay, piend-roofed, classical former Institution for the Formation of Character with advanced, pediment-gabled 3-bay central section and advanced 2-bay former engine house with arched windows adjoining to N. Squared rubble with droved and stugged ashlar dressings. Tabbed quoin strips. Regular fenestration to front and rear of Institute with slightly raised tabbed margins and projecting cills; large, tabbed, round-arched windows to front and side (N) of former engine house.

FURTHER DESCRIPTION: central Doric portico at ground floor of Institution with coupled columns; 2-leaf timber-boarded door. Oculus to apex of pediment. Engine House with stone steps to central 2-leaf timber panelled door in round-arched architrave with fanlight. Ramped late 20th century bridge abutting former loft door to S at upper level, linking with Mill No 3.

16-pane glazing (8-pane to upper storey) in timber sash and case windows to Institution; small-pane glazing in fixed timber windows to Engine House. Wallhead stack with ashlar cope to S elevation of Institution. Graded grey slates. Cast-iron rain water goods with hoppers.

INTERIOR: originally symmetrical plan at ground floor of Institution; at first floor larger room to right occupying two thirds of the area and smaller room at left. Original cobbled floor to basement; cast-iron columns. Hall to top floor with gallery running along 3 walls, supported on cast-iron columns. Interior of Engine House originally plastered, now exposed stone; timber-lined ceiling supported on wrought iron box girders.