Built to the highest UK standards, the 58BW Window System delivers a high performance and cost-effective solution with impressively narrow profiles. Equally at home on residential and commercial projects, the system is available in a number of formats including Top Hung, Side Hung and French Casement.

The system’s clean lines and advanced functionality meet the demands of almost every modern building construction. Its competitive pricing also makes it a highly popular choice with specifiers both in the UK and around the globe. In addition to being certified under Secured By Design and tested to PAS 24, the 58BW also holds a Green Guide ‘A’ rating.

Design Features

Certified under the Secured By Design scheme

Tested to PAS 24

Integrated deep head profiles for ease of trickle ventilation

Unique polyamide thermal break design to improve thermal performance

Casement system sightlines to match the Tilt Before-Turn window sightlines

Reverse rebate option for internal glazing throughout


Available in two frame depths: 58mm or 70mm

Supports both open-in and open-out projects

Internally or externally glazed to accommodate low and high-rise projects

Glazing 24mm–40mm

Available in the following configurations: Top Hung, Side Hung, Bottom Hung, Fixed Light, Multi-light and French Casement

Available for Lifetime Homes (LFT)

Dedicated fixing straps for ease of installation

Designed with a Euro Groove to accommodate standard locking hardware

Smoke vent certification compliance to EN12101-2:2003 Annex G

Available in single or dual colour polyester powder coating, texture and anodised finishes