Furness Abbey, Cumbria
Furness Abbey was founded in the 12th century and the remains that can be seen today were built on a timber raft which has begun to decay, causing movement and cracks in the Presbytery masonry. Following detailed archaeological investigation in 2012/13 trial works were carried out to explore a technique for underpinning the east end.
The agreed technique was drilling holes at regular intervals through the foundation layer followed by the cutting out with a specialist wire saw of each section and the careful removal of the material. The resultant slots are then filled in with a cementitious grout which when complete forms a new solid raft to support the Presbytery walls above. This underpinning has been combined with various structural repairs to the masonry at high level which together aims to stabilize the building for generations to come.