Bringing tradition into the modern age.

uPVC Flush Casement Windows

Ideal for both modern and traditional homes, these windows are a beautiful choice for all.

Product Features

Our range of Luton uPVC flush sash windows have been meticulously tested for their crime prevention qualities, offering high security standards that are due to built in features. This guarantees outstanding home security, ensuring peace of mind.

Utilising an innovative multi-chambered design, our Liniar flush sash windows work to trap heat within your home and notably increase the heat retention of your property. This allows increased comfort with reduced bills.

Specialising in protecting your property from the elements, our flush sash windows feature unique ‘flipper’ gaskets that promise to eliminate draughts and prevent water ingress. Ensure the adverse British weather doesn’t cause you a problem, today.

Our flush sash windows are flawlessly manufactured by expert craftsman to guarantee the upmost standards of quality.

Customise your Luton windows with traditional monkey tails and dummy stays for equal sightlines.

Inspired by traditional joinery, the frame and sash of these windows sit flush when closed.

uPVC Flush Sash Windows

We offer outstanding uPVC flush sash windows. They are sure to be an exceptional addition to any property.


Flush sash windows are expertly designed to loyally echo the appearance of traditional timber joinery, promising a charmingly traditional aesthetic.


All of our double glazed flush sash windows are accompanied with a comprehensive manufacturer’s guarantee, as well as an insurance backed guarantee. This allows you to enjoy a peace of mind only the highest quality can bring.

Market-Leading uPVC Flush Sash Window Profile

  • Multi-Chambered Profile for Outstanding Thermal Efficiency
  • 100% Lead-Free & Recyclable for an Eco-Friendly Design
  • A+ Energy Ratings

Contemporary Low Maintenance

Utilising premium grade uPVC, our Liniar uPVC flush sash windows promise homeowners ease of use and complete practicality. Due to the inherent nature of high quality uPVC, our flush sash windows in Luton require very little maintenance for them to maintain their pristine appearance.


Enhance your home with windows that stay beautiful with only a wipe of a cloth.

Colour Options

Obtain the perfect aesthetic for your flush sash windows with our comprehensive range of colours and finishes.


These colours include: White, Ivory, Chartwell Green, Dark Blue, Cedarwood and Golden Oak.

Refine Flush Sash Windows

We also offer the exceptional ‘Refine’ flush sash rage from Liniar. These accredited windows capture all the charm and grace of a traditional design that has been brought into the 21st century due to modern innovation.


Perfectly designed, these flush sash windows are available in two different styles. This includes either a mechanically jointed frame with welded sash, or a fully mechanically jointed option.



The Refine flush sash window is the only flush sash profile in the UK to offer you unbeatable standards of security throughout. They are also available in a wide range of colours and finishes for the ultimate addition to your home.

Glass Options

    • Benefits of Liniar

    Made In Britain

    All our Liniar windows and doors are manufactured right here in Britain. When you choose our products, you can be assured of a quality, British design.

    Energy Efficient

    Featuring a multi-chambered uPVC profile, our Liniar uPVC windows and doors offer high levels of thermal insulation. They are designed to keep heat inside the home where it belongs.

    Save Money

    Our uPVC Liniar windows and doors are very cost effective. Capable of achieving A+ energy ratings, they can help your home retain more heat and save you money on those costly energy bills over time.

    Eco-Friendly

    Our Liniar profiles are 100% lead free, meaning they are a better choice for you and your family. They are also fully recyclable, giving you an eco-friendlier home.

    Thermally Efficient

    A six-chamber uPVC profile helps you to contain and conserve more heath within your property.

    Triple Glazing

    Designed to accommodate energy saving triple glazing, our profiles are capable of achieving a U-Value of 0.8.

    Slim Sightlines

    Our Liniar windows and doors are designed with less frame and more glass, giving you enhanced light and views.

    Strong & Secure

    High security locking systems are fitted as standard for a safer and more secure home. Our windows and doors have also been independently tested and carry the PAS:24 2012 accreditation.

    Low Maintenance

    Your Liniar windows and doors will never rot, rust or need re-painting. Their profiles are made for a lasting performance.

    Colours & Finishes

    Choose from a wide range of window and door accessories, along with a beautiful range of colours and finishes.

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