PVC-U Cavity Closer system from Cavalok

100% recycled PVC-U, easy-to-install component designed to save time, money – and the environment.

Cavalok's PVC-U cavity closers are the simplest, most effective components for sealing cavities around openings in masonry walls. They are an essential component for any new-build project – large or small – helping to optimise time spent on site and boost the productivity of installation teams.

For Cavalok's range of products, including the BigBlok and FlameBlok systems, please visit the Cavalok cavity closer information pages.

The unique clip-together system requires no specialist tools or adhesives for assembly, and creates an effective damp-proof barrier that offers consistent performance, every time. The cavity closer provides a rigid template for brick and block work and facilitates straightforward, rapid window installation.

Why choose Cavalok cavity closers?

Designed with sustainability in mind, the Cavalok cavity closer is manufactured entirely from recycled material and incorporates an insulation core to enhance thermal efficiency. This pre-installed polystyrene core also saves time on site, since no additional insulation is required.

Further time is saved by the simple clip-together closer assembly system, which guarantees fast and accurate installation. The cavity closer allows pre-glazed windows to be fitted very quickly, using our quick-fit spring-clip system – optimising time on site and improving productivity for installers.

Technical specifications

• Available in sizes to fit 50mm and 300mm cavities.
• Manufactured from 100% recycled PVC-U.
• FlameBlok system independently tested fire protection for up to 90 minutes.
• Pre-installed insulation core to help meet Building Regulations Part L.
• Clip-together system requires only a screwdriver for installation.
• Minimal thermal resistance path through the closer of 0.45m²KW.
• Close fit with no gaps to prevent cold-bridging, condensation and mould growth.
• Improved PVC-U brick-tie design to prevent corrosion.
• Compatible with most window systems.
• Windows can be fitted from inside or outside the building – for compliance with working at height guidelines.
• Optional ventilated head section avoids need to rout through the window frame or sash.

Find out how Eurocell gives you more…

To find out more about our extensive range of window products or to arrange an appointment with your local Area Manager, please call us free on 0800 988 3050 – or simply fill in a contact form and we’ll be in touch as soon as possible.