Fitted aluk aluminium windows
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58BW HI Flush Windows

AluK flush aluminium windows create a stylish minimalist aesthetic to suit all glazing projects. With super-slim sightlines and advanced weather protection, they are the go-to window system for many professional glazing installers. Available in a wide variety of bespoke configurations, they can be custom designed to meet all your customer’s design specifications.

  • Weather tight double rebate
  • 65mm ultra-slim sightlines
  • Multi-point locking systems
  • Smoke vent compliant
  • Dual colour options
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Product features

Design features

58BW HI flush windows are a sleek and stylish aluminium window system. They are suitable for installation in contemporary new-builds and refurbishment projects. Their flush shadow line can feature a choice of a flat, putty line, or stepped edge vent to suit a variety of property types. While friction stays on the side hung model ensure only the best protection against extreme weather conditions.

Product options

  • Window energy rating B - C
  • Slimline 53mm outer frame
  • Multi-point locking
  • Class 4 air permeability
  • Class 9A water tightness
  • PAS 24 security tested
  • Multiple configurations available
  • U-values as low as 1.2 W/m²K (triple glazing)
  • U-values as low as 1.4 W/m²K (double glazing)


System depth

Top Hung - maximum size

Top Hung - minimum size

Top Hung - weight

Side Hung - maximum size

Side Hung - minimum size

Side Hung - weight

Bottom Hung - weight

Fixed Light - weight

Slightlines - frame to vent

Slightlines - vent to mullion to vent

Slightlines - dummy sash

Glazing thickness

Size and weight limits


Width 1400mm by height 1200mm

Width 350mm by height 250mm


Width 700mm by height 1400mm

Width 300mm by height 350mm


50kg (two hinges)





24mm to 35mm



Flush aluminium windows for modern and traditional applications

AluK 58BW HI flush aluminium windows are a sleek and stylish window system suitable for both contemporary and traditional property installations. Their sleek flush appearance creates a uniform aesthetic to a building’s exterior façade that is both attractive and helps to boost weather protection. They feature high security multi-point locking systems as standard and can be specified with either high performing double glazing or acoustic insulating triple glazing. With a range of configurations available, they are an excellent addition to any installer’s product portfolio.

Fitted aluk aluminium windows

Frequently Asked Questions

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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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