Blast Furnaces is a Grade I listed building in the Torfaen local planning authority area, Wales. First listed on 9 February 1995. House.
Blast Furnaces
- WRENN ID
- fallen-gallery-ivy
- Grade
- I
- Local Planning Authority
- Torfaen
- Constituency
- Torfaen MP: Nick Thomas-Symonds (Lab)
- Country
- Wales
- Date first listed
- 9 February 1995
- Type
- House
- Address
- Blast Furnaces, Blaenafon Ironworks, Blaenavon
- OS grid reference
- SO 249 093
- Coordinates
- 51.77739, -3.08906
- Source
- Cadw listing
Description
The blast furnaces are significant structures built of stone and brick, arranged on a square plan. Their ashlar stone elevations taper towards the top, and while they have lost some height, they remain just below their original dimensions. The side elevations feature small, intact tuyere arches.
Furnace No 2 includes several tie bars in the upper sections of its front and side elevations. It retains its original stone casing and cast house, which is listed separately.
Furnace No 4 has a large hearth opening, or tymp, created with an outer semi-circular brick-lined arch and an inner segmental brick-lined arch. Above the top of the arch, the facing stone of the outer furnace shell has been removed, revealing the stone core and the conical refractory brick lining.
Furnace No 5 shares the same design as Furnace No 4, although its hearth opening arch is in poorer condition.
Local climate
Blast Furnaces sits in a wetter-than-average part of the UK, with an average of 1,040 mm of rain a year. This makes it wetter than 83% of listed buildings in the UK. Its exposure to wind-driven rain is greater than that of 75% of listed buildings.
It experiences an average of 48 freeze-thaw cycles a year, more than 89% of listed buildings. Of these, 24 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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