Liniar Patio Doors

Enhance your home with our revolutionary uPVC patio doors, offering low profile thresholds to cater for the needs of today’s homeowner.

Liniar Refine Flush Sash

Our Refine Flush Sash windows, not only look beautiful but are also the UK’s first Secured by Design – fully mechanically jointed Flush Sash window. Based on traditional timber window styles with 21st century features and benefits, they offer the very highest levels of security and thermal performance.

Key Details

  • Mechanically Jointed

    We offer two options – a
    mechanically jointed frame with welded sash or a fully mechanically jointed

  • Secured by Design

    Our Refine windows are fully
    Secured by Design accredited – the only flush sash windows in the UK to achieve

  • Perfectly Designed

    50mm x 62mm single rebated sash
    design sits snugly in the 70mm outer frame.

  • Multi-Chambered

    Manufactured using
    multi-chambered uPVC Liniar profile for optimum thermal efficiency.

  • Tailored to You

    Customise our Flush Sash windows
    with key-locking monkey tail handles and dummy stays.

  • Yale Locking

    Yale Shootbolt locking windows
    are covered by a money-back promise in the event of a break-in.

  • Low Maintenance

    The traditional look of timber
    without the maintenance. You’ll never need to sand, treat or paint them.

  • Product Features

    Inspired by traditional timber
    joinery, Refine windows are perfectly suited to heritage style applications.
    However, select anthracite grey and the look will be transformed perfectly into
    a contemporary modern application.

Features & Benefits

A substantial colour range, most available within 7 days, and our acclaimed four-step hand finishing process make the Refine Flush Sash windows an exciting prospect for the homeowner. Beautifully designed and perfectly finished.

Windows that pass the test

You and your home are valuable and at ColdSeal we take
this very seriously. That’s why we offer Yale locking on our window products as they are one of the
most recognised and respected names in home security.

Window and door colours

Colour Options

The right colour to suit your home. Choose from traditional white PVCu to striking Anteak Teak to make a home look stylish, modern and chic.

Colours available

Agate Grey
Anthracite Woodgrain
Antique Teak
Basalt Grey
Black Woodgrain
Chartwell Green
Agate Grey
Anthracite Woodgrain
Antique Teak
Basalt Grey
Black Woodgrain
Chartwell Green
Window and door glass supplier


Sometimes you need to protect your privacy, which is why we offer a range of obscure glass.

Glass styles available

uPVC Window handles

Hardware choice doors

Our hardware has been selected to perfectly complement our doors and with partners such as Yale and Mila, we can provide the perfect combination.

Our range

Designed to meet the high standards and security that homeowners have come to expect for their home

Be inspired

Our window and door products can bring any house to life, from our
innovative Refine sash with no welds to our range of high-quality composite entrance doors. We aim to
inspire any homeowner to find the product to suit their needs.


Book a free home survey

If you like the look of our products & want to take the next step in transforming your home? A good place to start is to book free home survey

Schedule Now

Design your windows or doors

Try our simple tool and find the perfect window or door for your property. Choose the colour, handles, and accessories at the touch of a button.