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.

Spectus Sliding Sash

Maintain a traditional look for your home with our elegant uPVC vertical Sliding Sash windows.

Key Details

  • Sash Horns

    Our optional, decorative sash horns
    enhance the traditional look of your uPVC Sliding Sash windows.

  • Spring Balanced Mechanism

    The Spring spiral balances counteract
    the weight of the Sliding Sash for smooth and effortless operation.

  • Concealed Gaskets

    Our low-level PCE gaskets provide
    protection from the elements whilst remaining out of view.

  • Keeping Children Safe

    Our restrictors can be fitted to stop
    the bottom sash sliding fully, keeping your children safe.

  • High Security

    Our uPVC vertical Sliding Sash
    windows are available with high security cam locks for your peace of mind and added

  • Tilt Function

    The built in pivot bar enables sashes
    to tilt inwards for easier cleaning or extra ventilation at the push of a

  • Product Features

    Our EnergyPlus range of
    multi-chambered profiles as standard, achieve the highest possible BFRC Window
    Energy Ratings in the industry.

Features & Benefits

Every window hand-finished, they undergo a rigorous process by a skilled technician. Environmentally Friendly Liniar sliding sash windows are totally lead free and 100% recyclable, thereby reducing environmental damage and meeting EU and UK legislation ahead of time.

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.