Discover the AluK 58BW HI and 58BW TBT HI — premium aluminium window systems designed for commercial projects. The 58BW HI delivers robust performance, flexible configurations, and reliable thermal and security features, while the 58BW TBT HI adds tilt-before-turn functionality for safe ventilation without compromising style or efficiency.
Commercial & TBT Windows
Robust, reliable, resilient.
Commercial & TBT Windows
Performance, Versatility & Style — Tailored for Every Project
A Fully Integrated Window System, Built for Choice
Commercial & TBT Windows:
Engineered for commercial applications, the AluK 58BW window system offers a robust, cost-effective solution for a wide range of building types. Its durable aluminium construction, flexible configurations and large size capabilities make it ideal for offices, education and high-rise projects, while strong thermal performance, weather resistance and security ensure long-term reliability.
The AluK 58BW TBT (Tilt Before Turn) window system combines sleek aluminium design with versatile functionality. Its tilt-before-turn operation allows safe, controlled ventilation, while excellent thermal efficiency, weather resistance and PAS 24 security deliver reliable performance and comfort—making it a stylish and practical choice for a wide range of projects.
Choose from three high-performance window variants engineered for efficiency, security, and architectural impact.
| Feature | 58BW ST | 58BW TBT HI Tilt-Before-Turn |
|---|---|---|
| Frame Depth | 58mm / 70mm | 58mm / 70mm |
| U-Value (Double Glazing) | 1.4 W/m²K | 1.4 W/m²K |
| Acoustic Rating | Rw 43dB | Rw 40dB |
| Glazing Thickness | 24–40mm | 28–40 mm |
| Sightlines (Frame to Vent) | 75mm | 86 mm |
| Max Size | Top Hung: 1750 x 2500
Side Hung: 838 x 1750 |
1725 x 2300 |
| Min Size | Top Hung: 300 x 350
Side Hung:300 x 300 |
380 x 575 / 480 x 375 |
| Security | PAS 24 Option Available | PAS 24 Option Available |
| Certifications | Q-Mark, SBD | Q-Mark |
FAQ
What’s the difference between the 58BW HI and ST HI versions?
The ST HI is our residential offering, giving slimline aesthetics, while the standard HI version is used predominantly for commercial projects with it’s more robust sash and increased performance specs.
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.
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