Liniar uPVC Casement Windows Profile liniar casement window close up close up of liniar wood effect bay window liniar wood effect casement windows
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Liniar Casement Windows

Slimline casement windows from Liniar are designed to maximise natural light intake. Available with a sculptured or chamfered design, they are suitable for a wide range of installation projects from contemporary new builds to traditional property renovations.

  • A+ energy efficiency rating
  • U-values of 0.8 W/m²K (triple glazed)
  • Fully recyclable uPVC
  • Weatherproof system
  • 100% British made
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Product features

Design features

Liniar casement windows incorporate a patented bubble gasket into their design. The gasket is welded to the frame during manufacturing to create a continuous seal all the way round. This ensures that the window is fully water resistant and draught proof. Liniar casement windows are also available with a wide selection of customisation options. This includes optional child restrictors, a choice of coloured foils, and a selection of hardware options.

Product options

  • Double or triple glazing
  • Astragal bars and sash horns
  • Range of attractive hardware
  • A+ energy efficiency
  • Multi-chambered profiles
  • Patented bubble gaskets
  • Optional child restrictors
  • Sculptured and chamfered finishes




Casement Top Hung



Casement Side Hung



Resurgence Top Hung



Resurgence Side Hung





Suitable for modern and traditional installations

Liniar uPVC casement windows can be specified with either a sculptured or a chamfered finish. Both frame styles are aesthetically attractive and will enhance the appearance of any property. Liniar casements are a versatile window solution suitable for installations in both modern and traditional properties. They are an excellent addition to any installer’s product portfolio and can be supplied in larger orders to fulfil bigger commercial and residential upgrade projects. With Liniar windows, you can offer your customers outstanding performance every time.

liniar cream casement window

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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