Cynon Valley main Store Building (formerly the Casting House at Gadly's Ironworks

Twin gabled ranges with long flank to furnace bank. Dark rubble facings with red and yellow brick dressings, yellow brick patching to upper gable ends and under eaves possibly consistent with re-roofing (?). Pitched slate roofs, boarded eaves and plain bargeboards. Brick-dressed oculi (blocked) to gable ends with twin brick-dressed arched openings, 3 with traceried fanlights to SE end. Small, later range makes part of NW gable end which retains one traceried fanlight.

7-bay long flank with arched small-pane window frames set into brick-faced arched recesses (formerly open). Bolted plates to spandrels.

Interiors with twin boarded roofs with metal-rod trusses, central arched arcade in stonework with brick dressings. Brackets to spandrels of windows (formerly supporting rails for travelling cranes?).