Barn at Abercynafon is a Grade II listed building in the Brecon Beacons National Park local planning authority area, Wales. First listed on 17 December 1998. Barn.
Barn at Abercynafon
- WRENN ID
- riven-gravel-scarlet
- Grade
- II
- Local Planning Authority
- Brecon Beacons National Park
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 17 December 1998
- Type
- Barn
- Address
- Barn at Abercynafon, Glyn Collwn, Talybont-On-Usk, Powys
- OS grid reference
- SO 080 174
- Coordinates
- 51.84836, -3.33613
- Source
- Cadw listing
Description
The barn at Abercynafon is a five-bay structure built of stone rubble, originally featuring a Welsh slate roof. It includes a separate stable bay at one end. The barn has two long ventilation slits on each side of the double boarded opposing doors, with the inner side having a hood. There are high slits under the eaves leading to the end bay, which was formerly a loft, as well as a small round-arched opening below and a door with a stone lintel.
Inside, the barn has pegged collar and tie roof trusses and three rows of trenched purlins. The remains of a threshing floor can be seen, with sharp arises to the ventilation slits that have timber lintels across each pair. Small ventilators are present at the gable end. The stable in the end bay has three bays with mangers still in place, and there are voussoirs above the cambered arched opening.
Local climate
Barn at Abercynafon sits in one of the wettest parts of the UK, with an average of 1,200 mm of rain a year. This makes it wetter than 91% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 80% of listed buildings.
It experiences an average of 54 freeze-thaw cycles a year, more than 95% of listed buildings. Of these, 30 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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- No EPC on record for this property
- No sale records on file
- No related consent applications matched
- Detailed attributes — period, style, materials, features
- Flood risk assessment
- Radon risk assessment
- Weather exposure and heating demand — rain and frost month by month and year by year, wind direction, solar and humidity
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