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58BW HI Casement Windows

AluK 58BW HI casement windows are one of the UK’s highest performing aluminum window systems. With clean lines and outstanding functionality, they are suitable for both traditional and modern residential properties and are also regularly specified for installations in a variety of commercial applications.

  • A Green Guide rating
  • Polyamide thermal break design
  • Integrated deep head profiles
  • Trickle vent compatible
  • 24mm – 40mm glazing options
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Product features

Design features

AluK 58BW HI casement windows are an extremely versatile window option. They are available with either a 58mm or 70mm frame depth to allow for installation in a variety of building types. They can be internally or externally glazed depending on your project requirements and can be designed to open either inwards or outwards to meet your client’s specifications. Available in a range of colours, they are a great aluminium casement window system for any glazing installer.

Product options

  • 58mm or 70mm frame depth
  • Single or dual colour anodized finishes
  • Open in or open out functionality
  • Flush, bay, chamfered, heritage, ovolo, and contemporary designs
  • Top hung, bottom hung, or side hung options
  • Fixed light, multi light and French casement compatible
  • U-values as low as 1.2 W/m²K (triple glazing)
  • U-values from 1.4 W/m²K (double glazing)
  • Multi-point locking systems
  • Also available as tilt and turn


Top Hung

Tilt Before Turn

Side Hung

Bottom Hung

Top Swing

Side Swing

Fixed Light

Frame Depth

Dual Colour Option

Multi-point Locking

Glazing Option

Glazing Thickness

Sightline (frame to vent)

Sightline (frame to mullion)

Sightline (fixed light)










Internal & External Bead

24mm to 40mm













Internal & External Bead

24mm to 40mm






Stylish aluminium casement windows for all property types

AluK 58BW HI casement windows are an extremely versatile window system suitable for all property types. Available with flush, bay, chamfered, heritage, ovolo, and contemporary designs, they can be specified for any installation from the modern to the traditional. For the best in flexibility, AluK 58BW HI casement windows can be designed as top hung, bottom hung, or side hung configurations. They are also compatible with fixed lights, multi-lights, and French casements for the ultimate in inter-product compatibility.

aluk aluminium 58BW Internal Grey Window above kitchen sink

Frequently Asked Questions

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Contact Us

What are your lead times?

Lead times can vary per product. For stock PVCu colours we work to a 10-15 working day schedule. For more up to date lead times on any specific product e-mail us at where we will be happy to help.

Are your products compliant with new building regulations?

Our Eurocell PVCu range of products are fully compatible with all new build regulations. Quantum Windows has a number of secured by design certifications to provide you with peace of mind and our quality systems in place are all aimed at producing a quality product first time, every time.

Currently, our range of Aluminium double glazed Aluk 58BW HI Windows, Aluk 58BD HI Residential doors, EdgeGLIDE+ Sliding door and Unifold HI all have a U-value of 1.4 or below and are compliant with new building regulations. Our range of compliant products is always growing, so please give us a call for the most up to date information.

Please note that you will need to specify on your enquiry if you need your product to meet the new building regulations.

Where do you deliver to?

We deliver weekly to the West Midlands, Derbyshire, Leicestershire, Warwickshire, Oxfordshire, Berkshire, Surrey, West Sussex, East Sussex, Kent, Greater London, Hertfordshire, Essex, Suffolk, Cambridgeshire, Bedfordshire, Buckinghamshire. Norfolk and of course Northamptonshire.

aspects white open bi fold doors

I have been buying windows and doors from Quantum Windows for over 25 years. I have always found the pricing very competitive and the quality has been very high. On the rare occasion a problem has arisen it has been dealt with swiftly and efficiently. The office staff are always polite, friendly and professional and we have built a strong relationship over the last 25 years. The drivers are excellent. I know them very well and they have adapted to my ways of working and are always willing to help and accommodated me.

Craig Gutteridge

“We have dealt with Quantum Windows for 13 plus years, we find the staff to be courteous and polite and any queries we may have are dealt with promptly and efficiently, nothing is too much trouble”

Jackie - Accounts Dept

W R Enterprise Glass & Glazing Ltd.

We have been buying from Quantum Windows for almost 30 years now, they offer a wide product range and the Team have excellent product knowledge which is invaluable in an ever-changing market.

All team members are friendly, helpful and efficient, orders are processed with care and quotations provided promptly. I would have no hesitation in recommending Quantum Windows.

Vicki Webb

Clearview 2000 LTD

‘We have used Quantum Windows for many years now, we have always found them to be very easy to work with, the staff are all very helpful and friendly, they are always available to offer any help should we need it, excellent product!’


Chapel Windows

Glevum and Quantum have enjoyed an excellent working relationship for a number of years, working together to provide a high quality, value for money product offering and service for the end user.

As well as delivering a high quality product, the knowledge and experience of the staff at Quantum is invaluable to a customer in a market where Building Regulations are constantly changing.

Mike Donaldson

Glevum Design & Build

As installers of both PVCu and Aluminium to the New Build market, the importance of on time delivery is totally time critical.
Over the last 20 years Quantum windows have worked closely with PGB to partner with us and deliver our offer to site.
Highly professional, and a pleasure to have worked with them so closely over the years.

Phil Martin CEO

Portico CB Ltd

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