Hafod-Dwyryd Barn is a Grade II listed building in the Snowdonia National Park local planning authority area, Wales. First listed on 13 October 1966. Church.
Hafod-Dwyryd Barn
- WRENN ID
- grim-beam-birch
- Grade
- II
- Local Planning Authority
- Snowdonia National Park
- Constituency
- Bangor Aberconwy MP: Claire Hughes (Lab)
- Country
- Wales
- Date first listed
- 13 October 1966
- Type
- Church
- Address
- Hafod-Dwyryd Barn, Penmachno, Bro Machno, Conwy
- OS grid reference
- SH 790 498
- Coordinates
- 53.03253, -3.8053
- Source
- Cadw listing
Description
Hafod-Dwyryd Barn is a large barn constructed with roughly-coursed slate slabs set on foundations of massive roughly-dressed boulders. It features centrally-placed doorways on each long side, which have segmental heads made of narrow voussoirs and corbelled slate hoodmoulds. The barn includes two tiers of staggered ventilation slits. The roof consists of six bays supported by five collar and tie-beam trusses, although it is currently covered with modern corrugated material. To the north, there is a later addition of a low cowshed that is slightly offset from the barn's line. The cowshed has a door with a stone lintel facing west, and both structures have rubble walls and a slate roof.
Local climate
Hafod-Dwyryd Barn sits in one of the wettest parts of the UK, with an average of 1,310 mm of rain a year. This makes it wetter than 95% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 90% of listed buildings.
It experiences an average of 46 freeze-thaw cycles a year, more than 87% of listed buildings. Of these, 27 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.
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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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