Aluminium Casement Window

A minimalistic and contemporary edge. The AluK 58BW ST HI aluminium casement window.

The perfect aluminium casement window

Featuring industry leading build quality, the AluK 58BW ST HI aluminium windows are an ideal replacement for existing steel windows. In addition to impressive high thermal and acoustic performance, the design also replicates the minimal sight lines associated with steel windows, whilst providing superior performance and security

The AluK 58BW ST HI Casement Window offers clean lines and advanced functionality, whether you are working on a new build project or seeking stylish replacements for old windows.

We’re able to combine this with the ultimate in thermal performance achieving U-values as low as 1.1 W/m² K triple-glazed.

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Choose from three different options:

from Emplas are available in a choice of chamfered, sculptured or flush casement options.


A more ornate design replicating period steel window installations


A simple design with an angled fall away from the glass line


A cleaner and contemporary design, creating a minimalist contemporary appearance

Why choose the AluK 58BW ST HI

Durable colour

Our aluminium window and door ranges use a special flash-anodising process.

Completed ahead of powder coating this creates a protective anodised layer of aluminium oxide providing a better substrate for powder coating.

It means that our window and door range is supplied in a  finish guaranteed for 10-years. 

Standard Colour Options

Our standard colour ranges include a choice of white, anthracite grey, and black, plus dual colour anthracite grey-on-white and deep black-on-white. 

Special Colour Options

We can also offer you access to a range of textured finish options and supply any RAL colour on special order, giving your customers the flexibility to pick out the perfect shade to compliment their property.

24/7 online ordering

Want to find out more about our energy efficient window and door ranges?

AluK door and window manufacture and supply

We also supply the Unifold HI aluminium bi-folding doors, plus a complete range of AluK aluminium windows.

Become an Emplas Installer and gain access to all our great benefits plus get 15% off your first order*

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*based on a minimum spend of £1500

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