South Barn at Old Wellbury is a Grade II listed building in the North Hertfordshire local planning authority area, England. First listed on 24 October 1988. Barn.

South Barn at Old Wellbury

WRENN ID
crooked-ledge-vermeil
Grade
II
Local Planning Authority
North Hertfordshire
Constituency
Hitchin MP: Alistair Strathern (Lab)
Country
England
Date first listed
24 October 1988
Type
Barn
Address
South Barn at Old Wellbury, Hexton Road, Offley
OS grid reference
TL 141 297
Coordinates
51.95441, -0.34101
Source
Historic England listing

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

Description

The South Barn at Old Wellbury is a barn dating from the early to mid-17th century. It features a timber frame built on a brick sill, with an exterior that is plastered and dark weatherboarded. The barn has a steeply pitched roof that is now covered with slate. It is a tall, wide-span structure with three bays, facing north, and includes a low lean-to porch in the middle. There are pitching doors located in the side bays on the south side.

Architectural details include hollow moulded chin to jowls of the posts, long curved braces leading to cambered tie-beams, and mid-bay posts with staggered mid-height rails, which are also found in the end gables. The barn features long straight tension braces from the corner posts and in the middle bay. The roof is constructed with clasped purlins, having two purlins on each slope. The upper purlin is supported by a high collar, while the lower purlin is held by a low collar in the end gables, resting on inclined queen-posts in between. The wallplates are joined with face-halved bladed scarf joints.

Local climate

South Barn at Old Wellbury sits in a drier-than-average part of the UK, with an average of 710 mm of rain a year. This makes it drier than 88% of listed buildings in the UK. Its exposure to wind-driven rain is lower than that of 81% of listed buildings.

It experiences an average of 34 freeze-thaw cycles a year, fewer than 51% of listed buildings. Of these, 16 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
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  • 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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