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Stabilising parapet walls on tower blocks

Client:	Tamworth Town Council
Location:	Tamworth
Reference No:	CS018

Defects

Following the collapse of a 3m parapet wall on one tower block elevation a survey of six blocks revealed that:

The parapet walls had insufficient wall ties
Copings were loose and were not mechanically anchored
There was some minor masonry cracking and delamination

Helifix Solution

The installer, working to a Helifix designed repair programme, used a combination of Helifix products and concealed installation techniques to rapidly and cost-effectively solve the various problems. All work was undertaken from inside the parapet which overcame any need for specialist access equipment.

DryFix remedial ties were installed to increase the tie density to meet with current regulations and connect the walls to the internal concrete frame.
Coping stones were secured to the walls by vertically installing two CemTies per coping at diagonally opposite corners.
To stitch cracked masonry adjacent to openings, stainless steel HeliBars were bonded into selected channelled-out mortar beds using HeliBond cementitious grout.
Following re-pointing and making good the walls and their coping stones were fully stabilised and all repair products were totally concealed.