The brief
The roof had been replaced during local-authority work in the 1970s using a covering that was not appropriate to the character of the listed terrace. The client needed a durable new roof that restored the natural material and traditional appearance while addressing defects concealed within the existing build-up.
Because Lonsdale Square is Grade II* listed, the solution could not be treated as a routine strip and recover. The material, roof profile and associated details needed to be justified and agreed before work progressed.
Consent and careful opening-up
ER Group London helped secure the required listed building and planning approvals for the replacement. Once the man-made slate was removed, the team inspected the exposed roof and completed the necessary structural remedials rather than covering over defects.
The roof build-up was then upgraded with new insulation before being re-slated in natural Welsh slate. Leadwork was renewed in line with the applicable specification and Lead Sheet Association guidance, and the parapets were repaired as part of the wider weathering strategy.
The result
The completed roof reinstated a material and finish appropriate to the listed terrace while improving the performance of the underlying build-up. Just as importantly, the project followed an approved path from investigation and consent through to completion, with the hidden remedial work treated as part of the roof rather than an unexpected extra to be ignored.
Project imagery
Lonsdale Square roof replacement
