Cold-roll Engine-house at former Kidwelly Tinplate Works

The Cold-roll Engine-house at the former Kidwelly Tinplate Works is a Grade II* listed building constructed from red brick with a slate roof. The west side features a door, three blocked large doors, and an additional door. Each gable end has a roundel. The north gable end includes an arched entry, while the south end has two cambered-headed windows. The rear wall has eight windows, four of which are blocked. There is a later 20th-century lean-to roof over the cold-roll machines located outside to the west.

Inside, the building has white rendered walls and seven steel roof trusses. It houses massive machinery made by Cole, Marchant & Morley of Bradford, Yorkshire. A horizontal tandem compound engine powers a very large 5.5-meter (18-foot) flywheel on the left, which drives 15 steel hawsers connected to three large wheels in sequence on the right. A donkey-engine starts the first wheel, which in turn drives the next three, providing the motive power for the cold-rolling process outside. Overhead gantry rails are also present.