Designed to deliver a balance of contemporary style and high-performance engineering, the AluK 58BW Flush HI window system provides a sleek solution for both new-build and refurbishment projects. It’s flush finish and slim sightlines create a clean, modern appearance, while maintaining strong thermal efficiency, weather resistance and security—making it an ideal choice for architects, fabricators and developers alike.
Flush Casement
Performance, Versatility & Style — Tailored for Every Project
Flush Casement
Performance, Versatility & Style — Tailored for Every Project
Clean lines. Proven performance. Complete design freedom.
Technical Specification
| Feature | 58BW ST HI |
|---|---|
| Frame Depth | 58mm / 70mm |
| U-Value (Double Glazing) | 1.4 W/m²K |
| Acoustic Rating | Rw 43dB |
| Glazing Thickness | 24–32mm |
| Sightlines (Frame to Vent) | 66mm |
| Top Hung Max Size | 1436 x 1336 |
| Side Hung Max Size | 736 x 1436 |
| Security | PAS 24 Option Available |
| Certifications | Q-Mark, SBD |
FAQ
What’s the difference between the standard and flush casements?
With our flush window, the flat sash is inline with the outerframe, creating a seamless look. For our standard casement windows, the sash sits on top of the frame, and you can select between either a chamfered, flat or stepped sash.
Can I use these windows in high-rise applications?
Yes. All versions are designed for low and high-rise suitability, with internal or external glazing options and pressure-tested up to Class E2400 wind resistance.
Are these windows compliant with building regulations?
Yes. With U-values from 1.2 W/m²K (triple glazed) and Green Guide A ratings, the range is compliant with Part L thermal performance standards.
Is flush design available on all models?
No. The flush finish is specific to the 58BW HI Flush Casement model, designed for sleek, modern homes with a minimalist profile.
Can these windows be colour-matched to my project?
Absolutely. All models are available in single or dual colours, including anodised finishes, to suit virtually any design palette.
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