Base of Chimney at Cwm Pit is a Grade II listed building in the Merthyr Tydfil local planning authority area, Wales. First listed on 29 July 2003. Chimney base.
Base of Chimney at Cwm Pit
- WRENN ID
- final-moat-reed
- Grade
- II
- Local Planning Authority
- Merthyr Tydfil
- Constituency
- Merthyr Tydfil and Aberdare MP: Gerald Jones (Lab)
- Country
- Wales
- Date first listed
- 29 July 2003
- Type
- Chimney base
- Address
- Base of Chimney at Cwm Pit, Blaen Canaid, Troed-Y-Rhiw
- OS grid reference
- SO 044 043
- Coordinates
- 51.72935, -3.38531
- Source
- Cadw listing
Description
The base of the chimney at Cwm Pit is constructed from exceptionally large rock-faced stone squared blocks. It rises to a heavy raised band and then steps back in three tiers of similar blocks, leading to the site of a demolished shaft. Each side features a large arched stoking hole; three of these are lined with yellow brick, although it is possible that all were originally made of masonry, as one stoking hole remains with cut stone voussoirs and no yellow brick.
Local climate
Base of Chimney at Cwm Pit sits in one of the wettest parts of the UK, with an average of 1,210 mm of rain a year. This makes it wetter than 92% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 87% of listed buildings.
It experiences an average of 44 freeze-thaw cycles a year, more than 85% of listed buildings. Of these, 22 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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