Restorative remediation: Global HSE Group outlines Injectaclad cavity barrier repair method
Iain Hoey
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Global HSE Group examines Injectaclad, its installation process, applications and key benefits for restoring cavity fire barriers
A building with significant defects in its external wall fire safety systems present serious risks to both the structure and the people inside.
For example, a structure with missing or defective cavity barriers can experience rapid fire spread within wall cavities, causing devastating consequences for businesses, property owners and residents, while also posing a serious threat to critical infrastructure and occupant safety.
For the responsible stakeholders, amending buildings to become safe can be both costly and disruptive, with many projects requiring a full-scale removal of the external façade which often leads to disruption.
One solution available that enables non-intrusive works is Injectaclad, a remediation system for missing or defective cavity fire barriers to be retrospectively installed using a pumped system.
How it works
Injectaclad, for which Global HSE Group is a QA-approved installation contractor, is installed through small access openings created along the required compartment lines.
These can run vertically, horizontally, or around features such as windows and doors.
The openings are typically formed at approximately two-metre intervals horizontally and generally at floor levels for vertical installations.
At these locations, 4mm stainless steel InjectaPins are inserted into pre-drilled 6mm holes within the cavity.
A cylindrical acrylic mesh sleeve, known as InjectaMesh, is then positioned on the pins to establish and maintain the required compartment line.
Once the mesh and pins are in place, Injectaclad SS17 is pumped into the InjectaMesh.
The material expands to fill the cavity void, forming a continuous cavity barrier that reinstates the intended fire compartmentation within the external wall system.
The system, which can be used on a variety of buildings, including high-rise, commercial and residential, works by creating a fire-stopping barrier inside hidden wall cavities without removing the external façade.
By filling the cavity at specific compartment lines with a pumped, fire-resistant material, Injectaclad helps prevent the spread of fire and smoke through the building’s external wall system.
Once fitted, it has been tested to have a working life of 50 years, offers up to 120 minutes of fire resistance and is designed in accordance with fire safety regulations such as BS EN 1366-4 and BS 8414-1 &1366 part 4.
Visit www.globalpassivefire.co.uk/our-services/injectaclad-cavity-barrier/ for more information.
