Masonry repair and remedial wall ties to high-rise buildings, London University

The Requirement

A new external insulated render system was to be installed to increase the efficiency of the old university buildings.
The existing cavity wall did not have enough cavity wall ties to withstand the additional load of the new render system.
The outer leaf was also cracked due to thermal movement of the blockwork.

A wall tie and structural inspection was carried out to determine a suitable solution.
We installed several thousands of helical remedial wall ties and hundreds of helical bar crack stitches to secure the two-leaf masonry and reintroduce the structural integrity of the masonry via the crack stitches.
The project was carried out in two phases due to complicated scaffold access. All cavity wall ties and crack stitches were installed on time and to budget.

Case study reference: 09437

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