CRUMBLING 300-year-old walling at the heart of Wentworth Castle Gardens has been rebuilt following a painstaking restoration period.
The battlements are a prominent feature of the site, spread over 300 metres from the gardens of Stainborough Hall through to Stainborough Castle.
Thomas Wentworth built the wall - with bastions and archways - during the winter of 1738 but died a few months later.
It means the battlements were possibly his last building project but large sections collapsed in November 2023 due to pressure caused by mature trees.
After plans were submitted to Barnsley Council’s planning board to repair it, specialist firm Donald Insall Associates undertook the work when the green light was given.
A report, which documents the painstaking process of restoring such a historic aspect of the site, was released this week.
It said: “The conservation and repair works undertaken have been completed using traditional materials and techniques, with careful attention paid to the historic character and structural integrity of the battlements.
“Each intervention was informed by detailed condition surveys and adapted responsively to findings on site, ensuring that all repairs were sympathetic to the original construction and fabric.
“The collapse was attributed to pressure exerted by nearby mature trees and waterlogged ground, exacerbated by cementitious pointing which had trapped moisture within the structure.
“The solution incorporated soil nails for stabilisation and to restrain the newly rebuilt dry-stone masonry wall atop the existing bedrock.
“This approach mirrored a previous intervention undertaken circa
1970 on an adjacent section.
“Debris from the collapse was carefully removed and sorted prior to
commencement of works.
“Following clearance, an inspection by the contractor and structural engineer revealed that the original wall had been constructed directly onto bedrock, which in places was insufficient to bear the required
loads.
“A concrete kerb was therefore installed at the base of the affected section to provide a stable and continuous foundation.
“This kerb was positioned below ground level and remains concealed, preserving the visual and historic character of the battlements.
“Merlons were rebuilt and all-new works were carried out using lime mortar and matching stone, in keeping with the traditional materials and character of the battlements
“The south bastion had deteriorated significantly, exhibiting eroded stonework, missing merlons and coping stones, cementitious mortar, and areas of displaced or fallen masonry.
“The remedial works comprised the replacement of damaged stones,
which were carefully tooled to match the existing fabric.
“Merlons were repaired and reinstated, and existing coping stones were reset.
“Crenellations were reinstated to reflect the original size, style and
proportions of the historic merlons and embrasures.
“A cracked junction between the bastion and adjoining walling was rebuilt.
“Missing stonework was reinstated using matching stone and lime mortar, while all elevations were cleared of vegetation, and open joints were repointed in lime mortar.”
Wentworth Castle - South Yorkshire’s only Grade I-listed park and gardens - is now looked after by Barnsley Council, the National Trust and Northern College.
A National Trust spokesperson added: “The battlement walls have been rebuilt and the fencing has now been removed on castle approach.
“Over the last few years, we have undertaken a programme of work to improve the condition of built structures around this historic site.
“This has included the 18th century battlement walls which have been rebuilt using reclaimed stone.”
