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The Double Glazing Network is committed to providing consumers with the very best quality uPVC double glazing. In order to achieve this, we have devoted time, effort and expense in obtaining all of the standards and accreditations the industry has to offer. 

British Fenestration Rating Council (BFRC)

All products supplied by members of the Double Glazing Network are 100% British made by a BFRC approved manufacturer and licence holder. The Liniar window system is capable of achieving a WER (Window Energy Rating) of A+12 using a double glazed sealed unit. We are not aware of another window profile system that can match this extraordinary level of energy efficiency. Click here to visit the BFRC website.

Operating in Accordance with the British Standards Institution (BSI)

Founded in 1901, the BSI group is a non-profit distributing company which helps organisations improve their quality and performance as well as helping them become more sustainable. The BSI provide independent third-party certification of management systems, best practice standards and product testing. Liniar products are continually audited by the BSI to ensure compliance with important British, European and International Standards. Click here to visit the BSI website.

Secured by Design

The ‘Secured by Design’ Licence is the official Police security initiative backed by the Home Office Crime Reduction Unit ensuring high security standards for quality crime prevention products. We are proud to state that the Liniar product range has successfully achieved Secured by Design status. Click here to visit the Secured by Design website.

Kitemark Accreditations

The Kitemark is a registered certification mark which is owned and awarded by the BSI. The Kitemark symbol is globally recognised as a symbol of trust, integrity and quality. When you see the Kitemark symbol you can be assured that vital safety and performance requirements have been met which is why Liniar uPVC double glazing products provide a visible confirmation of quality. The Liniar range of products holds Kitemark licences 587164, 587165 and 587166. Click here to visit the BSI Kitemark website.

Energy Saving Trust

Our uPVC windows and doors are endorsed to display the ‘Energy Saving Recommended’ logo by the Energy Saving Trust. Only products that meet strict energy efficiency criteria are eligible to display this label. Click here to visit the Energy Saving Trust website.