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.