Tinhouse, Old Castle Tinplate Works

The Tinhouse is sited between the Hot Rolling Mill and the Assorting Room towards the E end of the site. Externally it is partially concealed by a later office range to the N, and by various corrugated iron sheds to the S. Its constructional form, however is clear: rough rubble walling, with corrugated asbestos and slate to roof which has distinctive ridge clerestory. 5 blocked segmentally arched openings with yellow brick heads beneath eaves in N-facing elevation; similar blocked openings in 2 tiers to S. Office range (c1960) to N is brick, but is built in what appears to be the rubble plinth of an earlier building.

The original layout survives virtually intact: 6 tinning bays to each side, each with heavy iron lintel carrying segmentally vaulted brick ceiling with central wide tapering rectangular chimney (truncated at roof level); each bay has small blocked window to either side of hearth; one bay retains parts of original pully mechanism. 2 bays in S range have been damaged by removal of chimneys; 3 bays to N partially bricked-up. Blocked segmentally arched doorway in centre of W wall formerly led to Hot Rolling Mill; sliding doors in E wall lead to Assorting Room. Light steel truss roof.