Barn at Great Tresenny

The barn at Great Tresenny is a substantial corn barn dating from the early 18th century. It is constructed from thinly coursed rubble stone, with slate covering the upper half of the roof and corrugated metal sheeting below. The south front features a large projecting gabled porch with a weatherboarded head and boarded double doors. To the right, there is a 19th-century outshut with a slate roof. On either side of the doors, the upper walls of the barn are adorned with tall six-light diamond mullions that have external boarded shutters, flanked by slit ventilators. The ground floor includes a single tier of three slit vents. The north elevation is similar but has smaller boarded doors leading to the threshing floor, and the mullions on each side do not have shutters. The west gable displays a datestone from 1722, inscribed with the initials T & J P, and below it is a pitching door with four vent slits in the lower wall.

Inside, the barn features a five-bay layout with a large and impressive interior space, including a wide threshing floor. The roof is supported by queen post trusses with three tiers of trenched purlins. The porch contains smaller framed trusses with angled struts that support the principals.