Barn in Grounds of Blaen Marlais is a Grade II listed building in the Pembrokeshire local planning authority area, Wales. First listed on 17 May 1988. Barn.

Barn in Grounds of Blaen Marlais

WRENN ID
dusk-screen-stoat
Grade
II
Local Planning Authority
Pembrokeshire
Constituency
Mid and South Pembrokeshire MP: Henry Tufnell (Lab)
Country
Wales
Date first listed
17 May 1988
Type
Barn
Address
Barn in Grounds of Blaen Marlais, Narberth
OS grid reference
SN 109 159
Coordinates
51.81059, -4.74312
Source
Cadw listing

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

Description

This is a probable early 19th-century barn located in the grounds of Blaen Marlais. It features a single storage bay with a threshing floor at one end. The walls are made of rubble stone and are whitewashed. The roof is modern slate and has a moderate pitch. There are broad doorways leading to the threshing floor, with timber lintels, although the northern door is blocked. The side walls of the storage bay have single deep ventilation slits, and there are pigeon boxes on the west gable end.

Local climate

Barn in Grounds of Blaen Marlais sits in one of the wettest parts of the UK, with an average of 1,170 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 95% of listed buildings.

It experiences an average of 13 freeze-thaw cycles a year, fewer than 88% of listed buildings. Of these, 5 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
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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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