Barn at Nantllanerch 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 Nantllanerch
- WRENN ID
- haunted-entrance-furze
- 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 Nantllanerch, Cwm Clydach, Talybont-On-Usk, Powys
- OS grid reference
- SO 083 211
- Coordinates
- 51.88154, -3.33324
- Source
- Cadw listing
Description
The barn at Nantllanerch is constructed of stone rubble and features a Welsh slate roof. It has lean-tos on the right side of the courtyard front, on the left gable end, on the right side of the farmyard front, and a wing extending from the left farmyard front, with some areas covered by corrugated roofs. The barn includes central double doors with a hood, one ventilation slit, and other small rectangular openings. There is a loft opening with timber mullions on the left gable end and a pitching door on the right gable end, along with a datestone located below. Inside, the threshing floor is made of flags and stone kerbs, and there is a stepped-down bay that leads downhill. The roof is supported by pegged collar and tie trusses.
Local climate
Barn at Nantllanerch sits in one of the wettest parts of the UK, with an average of 1,180 mm of rain a year. This makes it wetter than 90% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 78% of listed buildings.
It experiences an average of 57 freeze-thaw cycles a year, more than 96% of listed buildings. Of these, 32 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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