Calcining Kilns and attached abutment at Tondu Ironworks is a Grade II* listed building in the Bridgend local planning authority area, Wales. First listed on 9 November 1998. Industrial.

Calcining Kilns and attached abutment at Tondu Ironworks

WRENN ID
upper-storey-wind
Grade
II*
Local Planning Authority
Bridgend
Constituency
Bridgend MP: Chris Elmore (Lab)
Country
Wales
Date first listed
9 November 1998
Type
Industrial
Address
Calcining Kilns and attached abutment at Tondu Ironworks, Ynysawdre
OS grid reference
SS 891 844
Coordinates
51.54815, -3.60018
Source
Cadw listing

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

Description

The Calcining Kilns at Tondu Ironworks, which are listed as Grade II*, consist of a bank of seven kilns that are connected at the back to a ramped approach bank used for charging the kilns. The kilns are constructed from coursed stone rubble, with some areas featuring dressed stone and yellow brick dressings, along with patches of red brick. At ground level, there are semi-circular openings that are framed by two rows of brick voussoirs. The funnel-shaped chambers inside have brick arched vaults and stone walls. The corner of the bank showcases dressed quoins, and there is a protruding course of dressed stone above the openings. On the left side and at the rear, there is a plinth and a blocked stone and brick arch. The attached ramp, which is buttressed, is heavily overgrown with vegetation, making its features difficult to identify.

Local climate

Calcining Kilns and attached abutment at Tondu Ironworks sits in one of the wettest parts of the UK, with an average of 1,190 mm of rain a year. This makes it wetter than 91% 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 18 freeze-thaw cycles a year, fewer than 83% of listed buildings. Of these, 6 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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