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Liniar 70mm Flush Casement Windows

Liniar 70mm flush sash casement windows combine traditional aesthetics with modern performance. If you regularly work on properties that were built in the early part of the 20th century, then Liniar 70mm flush sash windows provide the perfect style for a realistic timber effect appearance.

  • A+ energy efficiency rating
  • Patented bubble gasket
  • Sleek flush finish
  • U-values of 1.2 W/m²K (triple glazed)
  • 28mm glazing
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Product features

Design features

Liniar 70mm flush sash casement windows are a great choice for installers who regularly work on period properties and in conservation areas. They are designed to tastefully replicate the appearance of traditional timber windows and are often approved for use in areas with planning restrictions. Their frames can be mechanically jointed for an authentic timber appearance with their slim sightlines and flush finish perfectly complementing a range of traditional architectural styles.

Product options

  • Double rebated seal
  • Double or triple glazing
  • A+ energy efficiency
  • Extensive colour choice
  • Optional safety child restrictors
  • Bespoke glazing options
  • Selection of hardware choices
  • Multi-chambered profiles




50mm Flush Sash Top Hung



50mm Flush Sash Side Hung



Resurgence Top Hung



Resurgence Side Hung





Traditional appearance and modern performance

Liniar 70mm flush casement windows are the perfect combination of traditional aesthetics and modern performance. Their sleek slimline frames and flush finish tastefully replicates the appearance of traditional timber windows without the regular maintenance required of wood frames. In terms of thermal efficiency performance, they can achieve an impressive A+ energy rating to ensure that they create a warm and efficient interior living space. For installers who regularly work on traditional property upgrade projects, Liniar 70mm flush casements are an excellent option.

Liniar white casement 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.

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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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