Glanffrwd Mill

Glanffrwd Mill is a two-storey building with a three-window facade, constructed from rubble stone with larger quoins and brick dressings, topped by a renewed slate roof. The south front features camber-headed windows with two-light small-pane casements that have been renewed in their original openings, along with double boarded doors to the left. The rear wall, which overlooks the bank of Ffrwd Cynon, has fixed windows in earlier openings, situated below a line of projecting drains at ground-floor level.

A detached waterwheel is located at the right-hand (eastern) gable end, where there is a single two-light first-floor window similar to those on the front, replacing a former first-floor doorway. The wheel is housed within a rebuilt stone-lined wheelpit and is a cast iron overshot wheel made by Ellis Brothers of Aberystwyth, restored by the Outlane Engineering Company of Huddersfield. The left-hand (western) gable end features an external stone stairway added in the late 20th century using re-used materials, leading to a first-floor doorway, which is a modern insertion made with salvaged bricks for the cambered head.

Most of the interior details are restorations. The ground floor has a flagstone floor that replaces the original cobbles, with line shafting for the machinery installed beneath; this was a change made during restoration, as the original line shafting was overhead. The new line shafting incorporates pulley wheels salvaged from scrap yards. The first floor has new floorboards and joists, accessed by a modern dog-leg stairway. The upper storey features a three-bay roof with sawn collar-beam trusses, and the underside of the roof is plastered. All windows are fitted with fielded-panel shutters.

The mill contains machinery on both floors. The ground floor houses carding machinery, including a picker cast by Rhodes & Son of Hope Foundry, Leeds, along with a scriber and a condenser, all made around 1860 and acquired for the mill in 1884. This machinery has been restored. On the upper storey, there is a loom for weaving rugs of unknown origin and a spinning jack that was brought from a woollen mill in Aberarth.