Designed for Specifiers

The C70S is engineered to the highest UK standards to deliver a high performance solution with impressively narrow profiles 


Slim sightlines guaranteed

A concealed coupler option gives added mullion support without compromising sightlines, while the z-adapter profile enables reversed fixed-light glazing for reduced sightlines

58BW Flush Window render

Exceptional water and air tightness

With test results of 1500Pa, the C70s offers the highest level of water tightness making it ultra-resilient to water ingress

58BW Flush Window render

Sub-cill profile for press metal

3mm-thick pressed cills can be added after window installation to avoid damage during building construction

58BW Flush Window render

Safe and certified

Secured by Design certification and PAS 24 on inward and outward opening windows for Approved Document Q projects

58BW Flush Window render

View our digital brochure

Download the Brochure

For technical details and section diagrams, download the brochure here.

Optio 58BW Flush Brochure

Request the CAD Cross Sections

Request the CAD cross sections and thermal profile, plus additional technical details.

Contact Us

Get in Touch

We would be happy to discuss how the new C70S can complement your project and can also arrange a virtual product demo with our Projects Team using MicrosoftTeams or Zoom.

Thank you for your enquiry. We’ll respond to you as soon as possible.
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Contact the Sales Team for all fabrication enquiries

+44(0) 1291 639 739

Why AluK?

With a team of 180 dedicated staff and factory space over 350,000 sq ft in size, we engineer the finest, tailored aluminium façade systems of windows, doors and curtain walling. Our expertise covers both commercial and residential, new-build and refurbishment projects, providing you with systems that deliver industry-leading style, performance and reliability.

Find out more about AluK