Tolgus Calciner and Remains of Arsenic Labyrinth with Chimney at SW 690 430 is a Grade II listed building in the Cornwall local planning authority area, England. Calciner.
Tolgus Calciner and Remains of Arsenic Labyrinth with Chimney at SW 690 430
- WRENN ID
- waning-fireplace-moon
- Grade
- II
- Local Planning Authority
- Cornwall
- Constituency
- Camborne and Redruth MP: Perran Moon (Lab)
- Country
- England
- Type
- Calciner
- Address
- Tolgus Calciner and Remains of Arsenic Labyrinth with Chimney at SW 690 430, New Portreath Road, Redruth
- OS grid reference
- SW 690 430
- Coordinates
- 50.2421, -5.24088
- Source
- Historic England listing
Description
The Tolgus calciner and the remains of an arsenic labyrinth, along with a chimney, are located on the west side of New Portreath Road in Redruth. This structure dates back to the 19th century and was used for refining arsenic. It is built from granite blocks and rubble, topped with a slate roof. The building is square and consists of a single cell, featuring a low segmental arch at ground level on the east side, various vertical tie-straps, and a pyramidal roof. To the west, there are remains of a brick labyrinth on the rising slope, and at the top, there is a short chimney made of uncoursed rubble and brick.
Local climate
Tolgus Calciner and Remains of Arsenic Labyrinth with Chimney at SW 690 430 receives an average of 870 mm of rain a year. This makes it wetter than 62% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 86% of listed buildings.
It experiences an average of 5 freeze-thaw cycles a year, fewer than 97% of listed buildings. Of these, 2 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
- 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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