Arches at former Ynysgedwen Iron Works is a Grade II listed building in the Powys local planning authority area, Wales. First listed on 26 March 1992. Iron works.
Arches at former Ynysgedwen Iron Works
- WRENN ID
- tangled-bailey-brook
- Grade
- II
- Local Planning Authority
- Powys
- Constituency
- Brecon, Radnor and Cwm Tawe MP: David Chadwick (LD)
- Country
- Wales
- Date first listed
- 26 March 1992
- Type
- Iron works
- Address
- Arches at former Ynysgedwen Iron Works, Ynyscedwen, Swansea, Ystradgynlais
- OS grid reference
- SN 783 092
- Coordinates
- 51.7683, -3.7643
- Source
- Cadw listing
Description
The Arches at the former Ynysgedwen Iron Works are two parallel arcades made of yellow brick, each featuring six large arches supported by seven rectangular piers. Each pier has two flush bands of large terracotta blocks, chamfered plinths, moulded brick bands, and capitals. The arches are constructed with a moulded brick outer ring made of header bricks arranged in three rings. The flat coping at the wall-plate level, which has replaced the original moulded brick, stands approximately 9 to 10 meters high. The moulded yellow brick details include a bull-nosed band on the columns and arch ring, as well as more intricate capitals on the piers. Iron brackets that once held the roof trusses are visible on the insides of the arches, though they have been cut back to the wall face.
Local climate
Arches at former Ynysgedwen Iron Works sits in one of the wettest parts of the UK, with an average of 1,490 mm of rain a year. This makes it wetter than 98% 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 43 freeze-thaw cycles a year, more than 81% of listed buildings. Of these, 21 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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