Barn at Llawr Llan is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 20 August 1991. Barn.

Barn at Llawr Llan

WRENN ID
floating-foundation-heath
Grade
II
Local Planning Authority
Powys
Constituency
Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
Country
Wales
Date first listed
20 August 1991
Type
Barn
Address
Barn at Llawr Llan, Crickadarn, Builth Wells, Erwood
OS grid reference
SO 091 422
Coordinates
52.0712, -3.32653
Source
Cadw listing

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

Description

The barn at Llawr Llan is a 19th-century structure featuring weatherboarded half-timbering with rubble stone end walls and plinths. The eastern front has an outshut addition to the right, flanked by stone piers that support double doors with a roof slightly lifted at the eaves. To the left of the double doors, there is weatherboarding with one door positioned left of centre and double doors at the extreme left, all of which are full-height. The southern gable is weatherboarded over rubble stone and includes an added weatherboarded lean-to. The northern end is constructed of rubble stone and has six vent loops.

On the western side, a tin sheet has replaced the weatherboard between the stone piers to the left of the double doors and on a short section to the right. There is also an added timber lean-to with a damaged southwest corner, while the original weatherboarded wall of the barn is visible within and to the right of the lean-to.

The barn has a six-bay roof supported by pegged tie-beam trusses with angle struts, including one truss with collar and queen struts. It features heavy construction with massive pairs of lapped purlins in the upper three bays and jowled wallposts below the tie-beams. The barn consists of four bays, with trusses on either side of the threshing floor carried on stone door piers. The truss to the north of the threshing floor, which has a collar, includes slots for timber-framing and may be a reused element. One bay to the south of the barn has a raised floor, while the upper bay contains a cart-shed with a loft.

Local climate

Barn at Llawr Llan sits in a wetter-than-average part of the UK, with an average of 1,020 mm of rain a year. This makes it wetter than 81% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 69% of listed buildings.

It experiences an average of 46 freeze-thaw cycles a year, more than 87% of listed buildings. Of these, 25 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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  • 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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  1. Cart-shed with granary and pig-sties at Llawr Llan Grade II 19 m
  2. Waggon shed at Llawr Llan Grade II 20 m
  3. Old farmhouse at Llawr Llan Farm Grade II 31 m
  4. Cowhouse and stable at Llawr Llan Grade II 34 m
  5. Privy at Llawr Llan Grade II 34 m
  6. Llawr Llan Farmhouse Grade II 43 m
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