Bersham Mill including cast-iron feed pipe

Both principal phases have similar construction: rough rubble with angle quoins to lower storey, with brick above ashlar string course; dentilled eaves cornice; slate roof. 2 storeyed, 5-window range to W elevation (largely a single building phase of 1828 but incorporating parts of the earlier foundry building towards the S), which has double doors towards the left, with steeply arched cambered brick heads. The windows all have decorative cast-iron traceried glazing bars and rusticated stone lintels. The S gable end is largely a survivor from the earlier foundry building, and has doorway to left with double ring cambered head, and inserted window alongside, wider than the earlier single ring cambered head above it. Upper window is also an enlargement and the head and jambs of the earlier opening remain visible. The E wall exhibits both phases of construction, with a straight-joint roughly half-way along its length indicating the junction of the 2 phases. Blocked doorway towards the left, with 4-light window alongside beneath cambered relieving arch. Squared blocked window above.

The building comprises a wheel chamber to the N, the rest a single 2-storeyed space of 7 bays with king-post roof trusses. The cast-iron and wood wheel with a 6.41m diameter is fed by a cast-iron pipe and penstock tank; the gearing survives in the lower storey immediately S of the wheel chamber, and there are 4 stone beds above.