The environmentally friendly cavity closer incorporating a cavity fire barrier for unequalled fire protection

The FlameBlok cavity closer is the first fully tested fire-rated cavity closer available for cavities greater than 100mm, and the only fire-rated closer manufactured entirely from post-consumer recycled PVC-U. Wall cavities are a hidden danger area for fires, so cavity fire barriers that help to prevent fires spreading are a critical consideration.

Independently tested fire protection for up to 90 minutes
FlameBlok cavity closers create a continuous ring of fire protection around openings in cavity walls, combing cavity closer and cavity fire barrier in one product. They feature foil-encased fire insulation that reflects flames and heat and prevents moisture penetration.

FlameBlok cavity closers have been independently and rigorously tested to BSE EN 1363-1:1999 by Chiltern International Fire, achieving 90-minute integrity in masonry walls and 60-minute integrity in timber-framed walls.

Ideal fire protection for timber and steel frame
FlameBlok represents a significant improvement on using timber battens to close cavities in framed buildings, providing better thermal performance at the junction, better fire performance and enabling windows to be easily removed. What’s more, the FlameBlok cavity closer has been specially designed to meet the needs of timber frame detailing. It is also the ideal choice for commercial developments where there is a greater risk of fire.

Fully tested and approved to meet stringent standards
The new FlameBlok cavity closer not only complies with current Accredited Construction Details (ACDs), it also meets anticipated tougher new ACDs and Part L regulations on thermal performance, as well as exceeding current Part B requirements for fire barriers in non-masonry construction.

Why choose the FlameBlok cavity closer?

• High-performance passive fire protection for up to 90-minutes – helping to minimise the spread of flame
• Manufactured from 100% post-consumer recycled PVC-U and high-density fire-resistant mineral wool – for a sustainable solution
• Creates a continuous ring of fire protection around cavity wall openings
• Widest size range available in a fire-rated closer – for cavities from 50-150mm wide
• Quick and easy to fabricate and fit – no need for additional fire socks to achieve the required fire rating
• Ideal choice for timber-framed buildings or commercial developments with high fire risk – offering improved thermal performance and fire protection
• Fully approved by BBA and NHBC, and compliant with all the latest Building Regulations – for your peace of mind.