Barn at Gwern-y-braichdwr is a Grade II listed building in the Gwynedd local planning authority area, Wales. First listed on 20 October 1966. Barn.
Barn at Gwern-y-braichdwr
- WRENN ID
- plain-vestry-moss
- Grade
- II
- Local Planning Authority
- Gwynedd
- Constituency
- Dwyfor Meirionnydd MP: Liz Saville Roberts (PC)
- Country
- Wales
- Date first listed
- 20 October 1966
- Type
- Barn
- Address
- Barn at Gwern-y-braichdwr, Cwm Main, Llandderfel
- OS grid reference
- SH 997 422
- Coordinates
- 52.96795, -3.49392
- Source
- Cadw listing
Description
The barn at Gwern-y-braichdwr is a rectangular structure built from local stone, topped with a steeply-pitched corrugated tin roof. On the east side, there are two entrances featuring modern boarded doors; the central entrance is full-height, while the one to the right is lower. The south gable is set into the slope, with a track running behind it, and includes an upper loading bay with an exposed timber lintel. There is a window on the west side, which was formerly an entrance but has since been reduced, and it also features an expressed timber lintel.
Inside, the barn has a five-bay layout with reused cruck blades that form pegged collar and tie-beam trusses. Notably, two of the tie beams have been cut and removed.
Local climate
Barn at Gwern-y-braichdwr sits in a wetter-than-average part of the UK, with an average of 1,110 mm of rain a year. This makes it wetter than 88% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 70% of listed buildings.
It experiences an average of 51 freeze-thaw cycles a year, more than 93% of listed buildings. Of these, 31 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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