Barn at Upper Trerew

The barn at Upper Trerew is a large medieval structure, approximately 23 meters long. The gables and lower sections of the long walls are built from rubble stone, with some brick detailing. The upper parts of each long wall feature timber framing; on the south side, the timber panels are mostly exposed, while some are covered with weatherboarding. The north side has timber framing clad in corrugated metal, and the roof is also made of corrugated metal.

The north elevation includes a massive oak doorway with a depressed four-centred arch leading to a former ox-house. There is a broad entry to the threshing floor in the center, which has a flat canopy and boarded double doors. The long wall to the right has a single-storey lean-to with a slate roof that obscures a six-light diamond mullion window that once lit the lower cowhouse. The rendered north wall of the lean-to features boarded half-doors at each end and a horizontal two-pane window in the center. The lower end has a west gable with a vent slit in the gable-head.

The ground floor cowhouse includes a central square two-light mullion window with a cambered brick arch and internal shutters, flanked by similarly arched doorways with boarded doors. The opposing east gable has a square pitching loft doorway.

The barn functions as a corn barn with seven bays. It has 20th-century tie beam roof trusses that flank the threshing floor, featuring raking queen struts and two tiers of purlins. At the upper end, the lower part of a large medieval cruck-framed gable truss remains, although the blades of the crucks have been sawn off above the tie-beam, with two tiers of panels still visible below. To the east of the threshing floor, the stone side walls rise to about 1 meter and are composed of two tiers of large square timber-framed panels. The south side has framed walls with angle-braces from the sill to the wall plate. To the west of the threshing floor, the stone side walls are taller, reaching about 2 meters with a single row of panels. The stone-flagged threshing floor is flanked on the west side by a transverse oak partition with a central doorway leading to the lower lofted cowhouse. At the upper end, the former ox-house is lofted, featuring two transverse ceiling beams that are chamfered with straight cut stops.