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Cavity Closers

The high performance Duraframe cavity closer provide the perfect solution for simply and effectively sealing the cavities in any new build, residential or commercial application. Duraflex offer a comprehensive range of cavity closers and an overhead vent that provides an accurate template during construction, insulates the cavity and ensures efficient window installation. A complete New Build system to suit all construction methods, the Duraframe is fully approved by BBA and covers cavity widths from 70mm to 150mm. Available for all cavity width dimensions with a unique extension system ensuring regulation compliance. Closers can be constructed in P and T Shapes, bespoke sizes/shapes and standard or check reveal applications. 

cavity closer

Features & Benefits

The Duraframe Cavity Closers are widely used by the UK's leading housebuilders, delivering a simple and effective solution for sealing cavities to ensure efficient window installation. 

  • High performance, versatile, effective system 
  • BBA Accredited Cavity Closer System
  • Suitable for cavity widths of 75mm, 100mm, 125mm and 150mm
  • 75mm to 125mm options for check reveal


  Download Cavity Closer Data Sheet

  Download Structural Cavity Closer Data Sheet