Wall Stabilisation with Helical Ties & Lime Grout

This week, following the approval of our repair design and restoration techniques, work started on the permanent stabilisation of the fragile stone walls at Rosemount Cottage. Having stood on the Bowcliffe Hall estate which dates from the early 1800’s the stone walls of Rosemount Cottage  were in urgent need of repair. Stone ties had failed and the inner and outer leafs separated, the rubble fill core had also become hollow and suffered from wash out. The entire historic building was now in danger of imminent collapse!

A major concern was that due to the fragile nature of the walls, the actual repair works could cause further damage and potential collapse of the structure. A facade restraining scaffold was erected to allow the repair and alteration works to take place, we then installed helical bars to tie the two leafs together. The helical bars were a carefully selected mixture of drive fix and masonry grouted ties; specialist drilling techniques were used to install the ties preventing further damage. The walls were further stabilised by grouting using hydraulic lime grout for the rubble core and a lightweight lime grout for large flue voids.

The restoration and repair scheme for the cottage also includes lintel replacements, the creation of helical masonry beams, crack stitching, repointing and stone repairs.