Project DescriptionThe Project: To repair existing cracking as a result of thermal movement and install additional movement joints to this brick built residential accommodation complex.
As was the case here, thermal movement often occurs to elevations that receive large amounts of direct sunlight throughout the day. The sunlight causes the temperature of the elevation to rise and slight expansion movement to occur. If adequately installed movement joints are not present, this can lead to cracking on the elevation.
Protectahome were selected as the contractor to undertake the remedial works that involved installing additional movement joints to the full height of the elevation and installing close to 300m of Helifix HeliBar to repair several cracks and strengthen lintels across the elevation.
6mm HeliBar was then fitted to the horizontal slots with one half of each Helibar encased in a de-bond sleeve. It is this sleeve that allows the required movement to take place following installation. Polypus Resin was used to secure the HeliBar into the masonry. The joints were then sealed using a flexible, weatherproof mastic type material to complete the installation.
To strengthen the existing lintels, a mixture of twin and single band HeliBars were installed across the full width of the elevation providing almost 300m of reinforcement. The stainless steel HeliBar was bonded into channelled out mortar beds using Helibond cementitious grout.
Using the same installation technique as the lintel repairs, 6mm HeliBar was also used to repair the existing cracking to the elevation.
All external drill holes, chases and mortar beds were repointed using matching material to leave a near invisible repair and a long term Protectahome guarantee was issued.