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Cavity Closers

Cavity Closers are the simplest, most effective way to seal cavities around wall openings and provide a rigid window or door frame acceptor. In addition to creating a rigid template for bricklaying and window or door installation, they enhance thermal efficiency, create a damp-proof course and prevent cold bridging.

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Cavity Closers

Cavity Closers are the simplest, most effective way to seal cavities around wall openings and provide a rigid window or door frame acceptor. In addition to creating a rigid template for bricklaying and window or door installation, they enhance thermal efficiency, create a damp-proof course and prevent cold bridging.

Cavity Closers

CAVALOK CAVITY CLOSERS
Cavity Closers are the definitive solution to thermal bridging at openings in cavity walls. Closers need to have a thermal conductivity better than 0.45m2K/W andall Cavalok Cavity Closers exceed this requirement thanks to their integral insulating foam.

The Cavity Closer creates a thermal break, which improves the insulation performance and reduces the CO2 emissions of a building. In addition, Cavity Closers prevent condensation from forming on internal walls.

The Cavalok Cavity Closure system is designed to create window and door openings while sealing cavities between 50mm and 100mm wide. It is fully compatible will all types of building, whether masonry, steel or timber-framed.

BIGBLOK CLOSERS
The energy-efficient BigBlok cavity closure is an essential component for low U-value construction, helping your buildings to achieve higher ratings in the Code for Sustainable Homes. The closure is designed for larger cavities 125mm to 300mm wide which can accommodate more insulation.

ROBUST CONSTRUCTION DETAIL
The Robust Construction detail highlights the need to build in window frames correctly to help limit thermal bridging and air leakage. This means the brickwork cavity must be closed before the window frame can be fitted. The cavity can be closed by either using a PVCU Cavity Closer, or any other means, as long as the U-Value meets that of the Cavity Closer (minimum 0.45m2 K/W). The frames must then be built in with a minimum overlap of 30mm over the cavity - see illustration left. These details apply to all window frames including bays, together with door and entrance frames.

1. Minimum frame / closer overlap Exposure zone:
Sheltered to Severe 30mm
Very Severe - fully rebated (check reveals)

2. Proprietary closer with minimum U Value of 0.45m2K/W

3. Sealant to front and back of frames / seals

 

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As a result of the improved stability of laminated timber construction we are able to provide guarantees for ten years on our paint finish and six years on our stain finish.

NOTE: All guarantees are subject to limitations and are strictly dependent upon compliance with manufacturers' usage and maintenance instructions. These are available upon request.

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