Sash Windows

Sash windows keep your home warm and secure while preserving its period charm. Available in wood or uPVC, our double glazed sash windows are made to measure and come with an A or A+ rated energy rating as standard.

Customise the look of your new windows with a choice of colours, finishes, handles and glazing options – including decorative Georgian or Victorian bars for that heritage feel.

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  • White Wooden Sash Window in Open Position
    White wooden sash window in open position
  • White uPVC Sash Window in Tilt Position
    White uPVC sash and tilt window in open position
  • White uPVC Sash Window in Dining Room
    White uPVC sash window in dining room interior
  • White uPVC sash window in garden in open position
    White uPVC sash window in open position in garden setting
  • White uPVC tilt and slide sash window exterior
    Wite uPVC tilt and slide sash window exterior
  • White wooden sliding sash window close up
    White wooden sliding sash window close up
  • _0000171
    White uPVC tilt and slide sash windows in kitchen interior
  • White wooden sliding sash windows at front of house
    White wooden sliding sash windows at front of house

Sash windows are made up of two glazed panels called ‘sashes’ and are either single or double-hung. Moving up and down on a vertical slider, single-hung sashes have only one moving panel, while double-hung means both sashes move. Our sash windows can be tilted open, allowing for easy maintenance and more ventilation.

Explore our Sash Window Materials

Reasons to Choose Sash Windows

  1. Warmer Home, Lower Bills

    Sash windows help keep the heat in your home with thermal inserts to stop warm air escaping, and high-performance pile weather seals to reduce draughts.

  2. Perfect for Conservation Areas

    Customisable features like Georgian bars, decorative horns and heritage-style window furniture mean our sash windows are easily tailored for homes in conservation areas.

  3. Open with Ease

    Perfectly counterbalanced through a system of hidden runners and springs, the internal open and close mechanism makes operation smooth and easy.

  4. Modern Security Features

    Key operated cam locks and limit stops are standard on our sliding sash windows. Security bars and reinforced sashes further prevent intruders.

  5. Add Value to Your Home

    Modern double glazed sash windows increase the energy performance of your home and its looks, making them a good long-term investment.

Dark woodgrain uPVC sash window with matching front door interior

Working with the Best Industry Bodies to Install the Best Sash Windows

  • BFRC logo


    The British Fenestration Rating Council (BFRC) verifies the energy performance of windows and doors in the UK. Installing BFRC rated energy-efficient windows will help save money on your energy bills.

  • bsienhancedsecurityofwindows2x

    BSI Kitemark

    The BSI Kitemark™ is one of the most recognised symbols of high quality products and safety standards. Anglian has 10 Kitemark accreditations, with six for windows alone.

  • BSEN12608 Windows and Doors accreditation


    British Standard BSEN12608:2003 Licence No KM 12876 - For colour fastness, impact resistance and corner strength uPVC frames.

  • FENSA logo


    The Fenestration Self-Assessment Scheme (FENSA) ensures replacement window and door installations comply with building regulations for England and Wales. You receive a FENSA certificate to keep as proof of compliance.

  • Glass and Glazing Federation logo


    Anglian is a leading member of the Glass and Glazing Federation (GGF). The GGF is the most influential Trade Federation in the industry, recognised by government for their in-house technical expertise, which helps influence key legislation within our sector.

  • Made in Britain logo

    Made in Britain

    The ‘Made in Britain’ marque on all our products means they are made from start to finish in a British factory by British craftspeople.

  • Recovinyl Plus logo

    Recovinyl Plus

    Recovinyl is an initiative advancing the sustainable development of the European PVC industry by improving production processes, minimise emissions, develop recycling technology and boost the collection and recycling of waste.

  • TrustMark

    TrustMark is a not-for-profit organisation operating a quality mark framework in the repair, maintenance and improvement sector. Registration with Trustmark demonstrates commitment to customer service, high standards and continual improvement.

Compare Sash Window Energy Ratings

B Rated
A Rated
A+ Rated
uPVC Sash
Wooden Sash

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10-year Guarantee

A 10-year parts and labour guarantee is included in your Anglian double glazing price.

Made in Britain

Made in Britain

Our products are made from start to finish in a British factory by skilled craftspeople.

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Price Match

If you find cheaper like for like uPVC windows elsewhere, we'll match the price.

Sash Window Design Options

Cream timber sash windows from Anglian Windows

Sash Window Colours

Design your sash windows to suit you with a splash of colour. Anglian uPVC sash windows come in a range of 8 handpicked traditional and contemporary window colours and either a paint or woodgrain finish. Our timber sash windows come with a huge choice of over 200+ RAL colours.

Sash Windows Locks and window furniture

Sash Window Furniture

Complete the look of your sash windows with luxury handles, locks, sash pulls, knobs and horns. Available in white, chrome or gold, you'll find the perfect finish from our uPVC and timber sash window ranges.

Bathroom sliding sash window with decorative obscure glass, made by Anglian Home Improvements

Sash Window Glass

Decorative glazing for Anglian sash windows is made by hand. Imagine a stunning feature box sash window with custom coloured bevelled glass effects, or our popular Georgian leaded window bars. If you can imagine it, we can almost certainly create it.

Decide if Sash Windows are Right for your Home

See what New Doors look like on your Home

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Design your doors and windows online

  1. Style
  2. Colour
  3. Hardware
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Your Questions on Sash Windows Answered by Us

Can you double glaze existing sash windows?

It is not possible to double glaze existing single glazed sash windows. You can upgrade your existing single glazed sliding sash windows to Anglian double glazed sash windows. If you are looking to increase your window energy performance and are looking for a more affordable way to do so, then secondary glazing is a good option. Secondary glazing fits behind your existing sash windows, providing extra warmth and sound insulation.

Can you insulate sash windows?

The best way to insulate sash windows is with cost-effective secondary glazing. However, if your windows have seen better days and are draughty, it might be time to consider new double glazed A-rated uPVC sash windows to improve your window energy performance.

What are timber sash windows made from?

Timber sash windows can be made from softwood or hardwood. We have a choice of both hardwood and softwood available, made from FSC®-certified and other controlled material. The FSC® label means that wood used for timber sash windows have been responsibly sourced. The timber is weather-sealed and has a 30-year guarantee against rot and fungal attack.

How do you measure up for sash replacement windows?

To measure up for replacement sash windows, you need to measure the sash window width and height, as well as the box frame width and height (the size of the hole in which the window is set). Our sliding sash windows are custom made to fir your home, contact us to book a free remote quotation today.

Can you soundproof sash windows?

Yes, the best way to soundproof sash windows is with secondary glazing. However, brand new windows with a higher energy rating tend to also be a significant upgrade from single glazed sliding sash windows for reducing noise. If you’re not sure which option is right for you, please talk to our team and we’ll be happy to explain the differences and benefits.

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Our Accreditations and Licenses

  • British Board of Agrement accreditation for uPVC windows from Anglian Home Improvements
    The British Board of Agrement provides certification on the quality of our products.
  • BFRC logo
    The British Fenestration Ratings Council is the UK’s national system for rating energy efficient windows.
  • bsienhancedsecurityofwindows2x
  • BSEN12608 Windows and Doors accreditation
  • FENSA logo
    The Fenestration Self-Assessment Scheme ensures window installers comply with buildings regulations in England & Wales.
  • Glass and Glazing Federation logo
    Anglian is a leading member of the Glass and Glazing Federation (GGF).
  • Made in Britain logo
    Certifies products made from start to finish in a British factory by British craftspeople.
  • Recovinyl Plus logo
    PVC Industry initiative to improve manufacturing, minimise emissions and develop recycling practices
  • TrustMark is a government endorsed not-for-profit organisation that operates through more than 30 scheme operators.