Faster, Simpler Fabrication

The high-performance C70S window system boasts clever design features for simpler fabrication and faster installation.

Slim sightlines combined with class-leading wind and water tightness make it a smart choice for all residential, commercial and city centre projects.

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Simpler, Faster Fabrication

Simple assembly

Clip-together assembly of Sub sill, frame extenders, Z adapter, and EPDM carrier closer profile

58BW Flush Window render

Shared parts with the 58BW system

Utilise shared parts to improve stockholding

58BW Flush Window render

Choice of corner cleats

Mechanical or crimped – work with your preferred choice and build faster

58BW Flush Window render

Maintain sightlines

With reversible rebates - glaze internally or externally with adaptors – ideal for high rise projects

58BW Flush Window render

Stock offer

Available in stock on a 5-day lead time in white, grey, and black, and dual-colours

58BW Flush Window render

Watch the C70S
Fabrication Video



Fabrication video guides are available for the C70S Open-In/TBT and Open-Out windows. Contact your local Area Sales Manager to receive a digital copy.

Download the Brochure

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

Optio 58BW Flush Brochure

Request a virtual or in-person product demo

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Let Us Train You

The AluK Academy offers a wide range of courses designed to give you the knowledge, necessary skills and expertise needed to fabricate and install our aluminium systems.

Covering everything from theory and software training to regulations awareness and practical work, each course is designed to give you well-rounded insight into AluK products and the industry as a whole.

View all our training workshop dates here

Book your place on the C70S Fabrication Training Workshop.

View our 58BW workshop dates

Become a Fabricator

Increase your portfolio and profit margins by adding the C70S to your range.

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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

Register your interest

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Get in Touch!

Find out more about the C70S or contact us to find your nearest fabricator.

01291 639 739