Using Synseal's profiles, Crystal is able to meet the most stringent industry standards and offer our customers a wide range of important accreditations.

  • BS EN14351-1:2006 + A1:2010: Performance charateristics of PVC-U windows and doors. Click here to view certificate.
  • BS6375 Parts 1 & 2: Weather performance of PVC-U windows and doors (air permeability, water tightness and wind resistance and operation and strength characteristics). Click here to view certificate.

  • PAS24:2012: Enhanced security performance requirements for doorsets and windows. Click here to view certificate.
  • BS EN 12608: PVC-U Profiles for the Fabrication of Windows and Doors. Click here to view certificate.
  • ISO 9001/2000: Quality Management System.
  • ISO 14001/2004: The manufacture and supply of PVC extrusions and gaskets windows, doors and conservatories, including foils of PVC. Supply of aluminium profiles for the construction industry. Also, warehousing and delivery of the above.Click here to view certificate.
  • BBA Agrement Certificate 09/4679.Click here to view certificate.


Secured by Design

Crystal's range of windows and doors have been accredited by Secured by Design for enhanced security. Secured by Design is the official UK police flagship initiative which supports the principle of 'designing out crime' and has been proven to reduce the crime risk by up to 75%. Click here to view certificate.


Crystal has also attained CMS marks for both EN1279 and EN 1435. Click the icons below to find out more.

Crystal Direct


Crystal Direct