Barn Range at Wern-y-cwm

The barn range at Wern-y-cwm is a 19th-century farm building that includes a large barn and attached farm structures. It is constructed of rubble stone with a slate roof and some brick detailing. The main barn features a central threshing floor and has large gabled porches on either side. The eastern porch includes a roundel in its upper gable and a datestone inscribed 'JI 1831'. It has a wide segmental arch made of stone voussoirs for cart access, along with boarded half doors. Each side of the porch has two tiers of two slit ventilators, although these are mostly hidden by the adjoining farm buildings.

To the north of the barn is a stable, while to the south is a single-storey pigsty that has a stone-walled front yard. A full-height extension is attached to the north gable of the barn, which contains stables on the ground floor and a half-timbered loft above, now covered with vertical boarding. The rear elevation of the barn features a porch with a similar segmental arched cart entry and boarded half doors. The north wall of this porch has a blocked 17th-century three-light diamond mullion window with a dripstone. The long walls on either side have tall ventilation slits. On the left side, there are two vent slits, a blocked ground-floor doorway, and a boarded door leading to the pitching loft above. On the right, three vent slits are sheltered by a 19th-century lean-to shed.

The barn has a roof with five bays supported by trusses that include tie beams and raking queen struts, along with three tiers of purlins. The threshing floor is flagged and has a transverse stone sill wall at its lower end. Inside, a blocked ovolo mullion window can be seen in the upper north gable. A beam spanning the eastern porch has mortice holes that indicate it may have originally served as either the lintel or sill of a diamond mullion window, possibly repurposed from an earlier timber-framed house at Wern-y-cwm.