Senior Architectural Systems is positioning its PURe® aluminium window range as a ready-made compliance solution for the UK’s upcoming Future Homes Standard (FHS), which will begin shaping new-build specifications from 2028.

Published in March 2026, the FHS introduces a fundamental change in how window performance is assessed. The transition to the Home Energy Model (HEM) means that U-values must now be calculated as “whole-window” performance based on the exact installed configuration, rather than relying on generic or standardised test values. This shift is intended to better reflect real-world thermal performance in completed homes. At the same time, the regulatory benchmark becomes stricter, lowering the maximum allowable window U-value in new dwellings from 1.6 W/m²K (Part L) to 1.2 W/m²K.

Senior’s PURe® system has been developed to meet these targets using double glazing, avoiding the need for thicker frames or mandatory triple glazing in many applications. The system achieves this through its patented PUR thermal break technology, which reduces thermal bridging within aluminium profiles and improves insulation across the frame. This allows designers to achieve compliant whole-window U-values across a range of configurations, including fixed lights, casement windows, and larger façade openings.

In practical terms, this means specifiers can maintain slimmer aluminium sightlines while still meeting energy efficiency thresholds. The system is also designed to reduce heat loss at key junctions such as frame-to-glass interfaces, which are often weak points in aluminium construction.

For projects with different architectural requirements, Senior also offers the Ali VU slimline system, designed for heritage-style glazing with minimal sightlines, and SPW+, a more recent platform that expands flexibility for both double and triple-glazed specifications. These options allow architects to tailor performance against aesthetic constraints without compromising compliance.