Former Boiler House at Dunlop Semtex Factory

Reinforced concrete construction with precast concrete panels; glazed and brickwork walling. High parabolic vaulted rectangle with two-storey gable end to road. Transverse arched ribs with panel infill, top floor jettied over continuous clerestory glazing to ground floor.

Diamond-lattice glazing over ribbed infill panels to outer gable lunette. Four large glazed openings with raised surrounds to S side elevation. Inner gable with elevated concrete railway viaduct to first floor loading doors; wide segmental arches on slender piers support ribbed cantilevered deck for railway with adjoining Y-spur (remarkable metal spiral staircase removed).

Interior of upper floor retains longitudinal concrete walls for trackway fed by gravity-feed coal bunkers. Ground floor concrete ceiling incorporates inclined feeds to central hoppers to serve boilers (now removed). Rectangular supports to ceiling and to rear openings under clerestory into single-storey extension with circular top-lighting and base of metal flue.