Ysguborwen is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 18 November 1980. Barn.

Ysguborwen

WRENN ID
frozen-cloister-curlew
Grade
II
Local Planning Authority
Brecon Beacons National Park
Constituency
Monmouthshire MP: Catherine Fookes (Lab)
Country
Wales
Date first listed
18 November 1980
Type
Barn
Address
Ysguborwen, Mamhilad, Pontypool, Goetre Fawr, Monmouthshire
OS grid reference
SO 301 032
Coordinates
51.72329, -3.01309
Source
Cadw listing

Also on this page: flood risk · radon risk · weather exposure · detailed attributes ↓

Description

Ysguborwen is a barn built from local sandstone rubble, featuring some dressed quoins and topped with a Welsh slate roof. The west wall includes two slit vents on either side of the cart entry, which has been infilled with modern glazing, and there is a small hood on brackets above. The roof is plain and steeply pitched, with a tall metal stove pipe. The east wall is similar, but it has an additional window on the lower level to the left and only one vent on each side. The north gable features a glazed taking-in door leading to the hayloft. The south gable is mostly obscured by a modern single bay extension, which has a casement window on each floor of the west wall and another in the gable end, while the east wall remains blind. The triangular vents noted by Fox and Raglan are mostly hidden.

The barn consists of five bays and is supported by four massive A-frame trusses, with the outer trusses being upper crucks that extend well down into the walls. The principals are halved and pegged at the apex. There are three tiers of purlins, some of which have been replaced, and the secondary rafters and roof covering were updated in 1993. The interior has been largely modernized, and the original threshing floor is no longer present.

Local climate

Ysguborwen receives an average of 940 mm of rain a year. This makes it wetter than 73% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 72% of listed buildings.

It experiences an average of 41 freeze-thaw cycles a year, more than 79% of listed buildings. Of these, 19 follow at least 1 mm of rain in the preceding 48 hours. Average temperatures at this location have risen by 0.3°C per decade since 1991.

Averages for 1991–2020; temperature trend 1991–2025. Figures describe the wider area (a grid cell of roughly 10 km), not the individual site. Contains modified Copernicus Climate Change Service information 2026.

More on this building

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