Unrivalled security built into the heart of every window
Keeping you safe

High security is built-in as standard across the entire Sheerline product range, with our beadless range offering the ultimate peace of mind.

Tested to Destruction

With a truly integrated design, built with security in the forefront of our research and development team’s minds, and with features such as hinge protectors being standard across all systems, you can rest assured in the security credentials of Sheerline’s systems.

In security testing the Classic system achieved an average maximum load across hinge and lock side of 729Kg (917Kg on hinge 540Kg on lock). A phenomenal result bearing in mind that 306Kg is the required pass test load for a window and 459Kg for doors. Well over twice the required level.


All Sheerline windows carry PAS24:2016 enhanced security accreditation as standard, so if you are looking for stylish aluminium windows and doors with extra peace of mind – then we have you covered.

Beadless Design

The innovative construction of the Classic window system eliminates the need for separate glazing beads – often an area of weakness in traditional window design.

Instead our patented corner jointing method securely locks the glass away within a completely sealed unit. This coupled with high security multipoint locking and unique hinge protectors creates unparalleled levels of security. No window in its class is as secure.

Secured by Design

For added peace of mind choose Sheerline aluminium windows and doors are available with a laminate glass upgrade – for Secured by Design accreditation – the official UK Police initiative ‘designing out crime’ through physical security.

Made in Britain