Llwydiarth Saw Mill is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 22 October 1986. Industrial building.

Llwydiarth Saw Mill

WRENN ID
carved-entrance-violet
Grade
II
Local Planning Authority
Powys
Constituency
Montgomeryshire and Glyndwr MP: Steve Witherden (Lab)
Country
Wales
Date first listed
22 October 1986
Type
Industrial building
Address
Llwydiarth Saw Mill, Banwy
OS grid reference
SJ 020 154
Coordinates
52.72801, -3.45117
Source
Cadw listing

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

Description

Llwydiarth Saw Mill is a two-storey timber-framed structure, primarily weather-boarded, with a slate roof that runs east to west. The front (north) features a quasi-axe-dressed stone ground storey with boarded openings. Approximately half of the front is weatherboarded, while the other half is clad in corrugated iron. The roof is in poor condition, particularly at the west end. The later north and south wings have been removed.

On the east gable end, there is a small two-light window, and a larger opening is found in the west gable end, where the weatherboarding is only minimally present. The south wall, which was not re-inspected in 2002, is reported to consist of two storeys of stonework with timber lintels and strappings over blocked openings.

A timber turbine-house located at the south-east corner has collapsed. It was reported in 1986 to have housed a turbine by Gilbert and Gilkes, numbered 1871 and purchased in 1907, which was still in place at that time.

Although not inspected during the resurvey, the mill is said to retain an industrial-style king-post roof and a fine timber floor, which is propped, with massive longitudinal timbers flanking the saw-pit. The mill also features a fine timber frame supporting a rare vertical frame saw. Additionally, there are drive shafts from the turbine house and a pulley mechanism for the frame-saw on the lower floor.

Local climate

Llwydiarth Saw Mill 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 80% of listed buildings.

It experiences an average of 48 freeze-thaw cycles a year, more than 90% of listed buildings. Of these, 28 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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