Treforest tinplate works

The six remaining buildings on the site were constructed in the mid 19th century during which time the iron and tinplate industries were dominated by South Wales.

[3] William Crawshay II oversaw the redevelopment of the site in the 1830s during which time the surviving rolling mill building was constructed.

A major expansion to the works c. 1854 saw the addition of the tinning house which had space for 12 furnaces.

The 150 m (500 ft) long rolling mill is where bars of iron were transformed into thin sheets.

The waterwheels that powered the machines were supplied with water by iron launders connected to the leat running parallel to the west side of the building.