Delivers improved efficiency and sustainability

 Cav-Crystal is the vital component for new build developments for sealing cavities around openings in walls - choose Cav-Crystal.

This BBA accredited system provides a rigid template for brickwork, optimises time spent on site, and boosts the productivity of window installers and bricklayers.

Cav-Crystal requires no tools, adhesives or screws as the system simply clicks together. Manufactured entirely from recycled PVC-U, our cavity closers are the perfect choice for every new build project and assist compliance with the Code for Sustainable Homes.

Crystal offers a project specific take off service for builders, architects and developers. We help you streamline operations and further saving you time and money. Simply send us your window and door schedule and we will calculate the size of the cavity closers required for your project.

Cavity closers features and benefits

  • Uses a reusable bracket and brace system
  • Manufactured from 100% recycled PVC-U
  • Tough and robust design
  • Suitable for cavities up to 100mm
  • Quick and easy to fabricate and cut
  • No adhesives required
  • Fully approved by the BBA
  • Compatible with most window systems
  • Windows can be fitted internally or externally
  • Helps comply with HSE working at height guidelines
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Crystal Direct cavity closers boast
huge benefits


  • Warranty

    Cavity closers come with a 10 years manufacturer's warranty


  • Energy efficiency

    Manufactured from energy efficient PVC-U


  • Quality

    Manufactured to the highest quality standards and BBA accredited


  • Recycling

    Manufactured from 100% recycled PVC-U

Crystal directAccreditations

To find your local supplier use the search box below to get
a list of Crystal approved and Platinum partner
supplier locations
within your area.