TOP

Sliding Sash Windows

Double glazed sash windows

Sash Windows

Energy Efficient Sliding Sash Windows

  • Authentic period design
  • Smooth running mechanisms
  • Eliminates draughts
  • Traditional wood or modern uPVC
GET A FREE QUOTE

Double Glazed Sash Windows From Everest

Sliding sash windows are a classic style of window mostly found in period homes, but also in some contemporary homes. With traditional style and modern technology, wooden sash windows are the ideal choice for conservation areas. Everest uPVC sash windows maintain the authentic appearance of timber, but without the maintenance and are available in woodgrain finishes which look as good as real wood. Our uPVC sash windows are A rated for energy efficiency and include a tilt function for easy cleaning, a perfect combination of performance and practicality.

Our sash window materials

Everest offers sliding sash windows in traditional timber or low-maintenance uPVC.

An Everest timber sliding sash window

Timber Sash Windows →

A timber sash window is the most authentic option when replacing wooden windows. Everest timber windows are available in Softwood (European Pine) or Hardwood (African Sapele), both responsibly sourced. Expertly handcrafted our wood is laminated and engineered for layers to specially bond together adding strength and rigidity. For even further durability our softwood is finger jointed to eradicate knots and resist twisting.

  • Engineered wood to stop rattling
  • Softwood or hardwood options
  • Smooth running - traditional sash cords or modern spiral balance
Everest white uPVC sash windows

uPVC Sash Windows →

uPVC sash windows perfectly combine modern technology with traditional styling. Using an innovative spiral balance mechanism, they operate in the same way and maintain the authentic appearance as a wooden sash window. However, uPVC requires little maintenance, no painting and Everest uPVC sash windows include a tilt function which allows both sashes to tilt inwards for easy cleaning. So, uPVC can offer a great alternative, even if it’s just for the rear of a property when the front must be timber.

  • Excellent value
  • Spiral balance running mechanism to enable a greater glass area
  • Woodgrain uPVC option – you can't tell the difference

Customise your Sash Windows

Everest sash windows are made completely bespoke for you, with a wide range of options and colours to choose from.


Sash window colours

Our windows are available in a beautiful range of colours including uPVC woodgrain finishes, which look like real wood, but without any of the maintenance issues.


The single colour frames are the same colour inside and outside. On dual colour options the frame is white inside with a second shade on the exterior, in keeping with both the character of your property and inside décor.


uPVC colours

White

White

White Woodgrain

White Woodgrain

Dual Cream

Dual Cream

Dual Sage Green

Dual Sage Green

Dual Anthracite Grey

Dual Anthracite Grey

Dual Dark Woodgrain

Dual Dark Woodgrain

Dual Golden Oak

Dual Golden Oak


Timber colours

White

White RAL 9003

Ivory

Ivory RAL 1013

Anthracite Grey

Anthracite Grey RAL 7016

Olive Green

Olive Green RAL 6011

Fir Green

Fir Green RAL 6009

Eucalyptus

Eucalyptus RAL 6034

Dark Woodgrain

Dark Woodgrain Stain

Golden Oak Stain

Golden Oak Stain

Black Stain

Black Stain

Ebony

Ebony

Sash window furniture

For the perfect finishing touch, we offer classic sash window furniture such as sash lifts and fitch locks, all offering flawless operation and outstanding quality.


uPVC hardware

uPVC Fitch Lock

Fitch Lock

uPVC Lift Hook

Lift Hook

uPVC Easy Clean Latch

Easy Clean Latch

uPVC Restrictor

Sash Restrictor


Gold

Gold

Chrome

Chrome

White

White


Timber hardware

Timber Fitch Lock

Fitch Lock

Timber Lift Hook

Lift Hook

Timber Sash Restrictor

Sash Restrictor

Timber Sash Pull Handle

Sash Pull Handle


Gold

Gold

Chrome

Chrome

Sash window glazing

All our sash windows come with a double glazed Low-E glass as standard, but we also offer a range of glass options to improve energy efficiency, add aesthetics or provide privacy.

  • +
    Double Glazing
    Double Glazing

    Double Glazing
    Double-glazed windows comprise of two panes of glass that are separated by a spacer bar. The layer of air or gas sandwiched between the panes provides an insulation barrier against noise and heat loss, helping you to maintain a warmer, quieter home.
    Read more >

  • +
    Obscure Glass
    Obscure Glass

    Obscure
    A range of patterns available with different levels of privacy to suit your needs. Ideal for bathrooms bedrooms or anywhere else you want privacy.
    Read more >

  • +
    Decorative Glass
    Decorative Glass

    Decorative Glass
    Manufactured in a variety of ways to give a wide choice of patterns, textures and colours, decorative glass effects can be created on double glazing window panels by silvering, tinting, acid-etching or applying ceramic paints. ecorative glass looks beautiful in top hung fan lights (the top sashes of casement windows), as well as feature windows in halls and stairwells.

  • +
    Toughened Glass
    Toughened Glass

    Toughened
    Designed and toughened to shatter into fragments if shattered for enhanced safety. Regulations dictate when this must be used but can be installed anywhere. Safety glass required below or partly below 1500mm for doors and side-panels within or partly within 300mm of a door and below or partly below 800mm for windows.
    Read more >

  • +
    Security Laminated Glass
    Security Laminated Glass

    Security Laminated Glass
    Everest’s 6.4mm & 6.8mm laminated security glass surpasses every security standard on glass with an extra layer of laminate for added security. Laminated glass offers significant performance benefits over non-laminated glass. The layer inthe centre is made from PVB, polyvinyl butyral.
    Read more >

  • +
    Leaded Glass
    Leaded Glass

    Leaded
    Stylish strips of lead are a purely visual benefit that can be added to your window in order to make it more aesthetically pleasing. There are a range of leaded glass options that suit both modern and traditional houses, including square and diamond designs.

  • +
    Georgian Bars
    Internal Georgian Bars

    Georgian Bars
    The perfect solution for traditional or conservation properties, Georgian bars visually divide the glazing units into smaller panes of glass.

    Everest Internal Georgian bars (only available on uPVC sash) are fitted within the sealed unit, between the panes of glass for easy cleaning.

    External Georgian bars are fitted to the outside of the glazed unit, standing proud of the glass for a touch of authenticity.

Sash window extras


Sash horns

On the underside of the top sash section, there is an optional component known as a horn. There are two types available: plant on horns and through horns. Through horns offer a richer more authentic aesthetic with the bottom section ‘butting’ against the side sections.

No horn

No Horn

Through horn

Through Horn

Plant-on horn

Plant-On Horn (uPVC only)


Opening mechanism

The opening mechanisms on our timber sash windows are hidden, giving a smooth, tidy appearance. Whether you select authentic cords and weights or opt for the modern twist with spiral balances, the innovative design ensures the window opens smoothly.

Spiral balance

Spiral Balance

Cords and weights

Cords & Weights


Bay configuration

A bay window is an arrangement of three or more individual window units. A bay window adds a projection to the wall which can be stood in, adding a stylish look from the outside and a great place to sit and relax on the inside.


Read more >

Sash Windows gallery

Look at how some of our customers transformed their homes with new sliding sash windows.

Everest sash window in white

Click to enlarge

Sash windows – a traditional look without the traditional drawbacks

Whether your home is Edwardian, Victorian or Georgian, sash windows are the natural choice for most period properties. They can also add a lovely traditional edge to more modern properties. Available in both uPVC and timber, our advanced sash windows are made to measure, so no worries about sticking, jamming or wobbling.

GET A FREE QUOTE >

Traditional, durable and energy efficient

Everest timber sash windows offer the ideal balance of traditional wooden sash windows combined with the durability, energy efficiency and reliability that comes with buying Everest windows and doors. Precision-crafted for a perfect fit, they also come with a 30 year guarantee to give you peace of mind that they'll last for decades.

GET A FREE QUOTE >

Everest sash window in white

Click to enlarge

Everest sash window in white

Click to enlarge

White Everest Sash Window

Click to enlarge

Double glazed wooden sash windows to keep you warm

Everest's superior double glazing, advanced locking mechanisms and weather resistant seals mean your Everest timber sash windows will keep the warmth in and the cold out, as well as reducing the noise from outside.

GET A FREE QUOTE >

Easy does it

These are vertical sliding sash windows made from uPVC. As well as sliding, they tilt for easy cleaning, although uPVC has the advantage of needing little or no maintenance. The frames are also guaranteed for life against fading or discolouration.

Project: Hampton Court
Garden by: David Domoney
Photographer: Richard Lee

GET A FREE QUOTE >

Everest sash window close up

Click to enlarge

Uniquely low rated

Our uPVC sash windows all feature A rated double glazing to keep your home warmer and you also get a nice warm feeling from the much lower energy bills associated with them. Perfect!

Project: Hampton Court
Garden by: David Domoney
Photographer: Richard Lee

GET A FREE QUOTE >

Everest sash window inside

Click to enlarge

Everest sash window close up

Click to enlarge

Flexible from top to bottom

One of the beauties of sash windows is the flexibility they deliver, allowing either the top or bottom section to be opened, or both at once. As with all of our timber windows, a beautiful bespoke design like this can be installed within as little as six weeks.

Project: Henley House
Styled by: Ann Broad

GET A FREE QUOTE >

Green wooden Everest sash window

Click to enlarge

Even our guarantees look good

This is a timber sliding sash window in softwood, which comes in a wide variety of colour finishes. We also offer hardwood options, complete with a choice of stained finishes. All of our timber sash windows have a 30-year guarantee against rot and fungus, plus a 10-year guarantee on the whole window and installation.

Project: Henley House
Styled by: Ann Broad

GET A FREE QUOTE >

Safe and secure

Here you can see the ring pulls and key-lockable traditional style fitch locks. These are in chrome, but different options are available. Like all of our windows, these are securely beaded to prevent the glass being removed from the outside.

Project: Henley House
Styled by: Ann Broad

GET A FREE QUOTE >

Green wooden Everest sash window

Click to enlarge

Green wooden Everest sash window

Click to enlarge

Brown timber Everest sash window

Click to enlarge

Natural warmth, plus a little help from us

This is a hardwood timber sash window, with a beautiful stained finish. The timber frames naturally retain heat, while the 20mm gaps between the panes of the double glazing keep out the cold and draughts.

Project: Marlow House
Styled by: Ann Broad

GET A FREE QUOTE >

Extra touches that add so much

Here you can see the wonderful richness of the mellow teak stain, just one of the finishes you can opt for. The main picture shows the decorative horn design in the corners, while the pictures on the right show the durable and effective cords and weights system.

Project: Marlow House
Styled by: Ann Broad

GET A FREE QUOTE >

Brown timber Everest sash window

Click to enlarge

Brown timber Everest sash window

Click to enlarge

Summer sale - up to 15% off across the Everest product range*

*Plus with Triple Glazing as Standard on our uPVC windows and Signature composite doors - Terms & conditions apply.

FIND OUT MORE

The benefits of Sash Windows


Authentic, practical design

Both our timber and uPVC windows are authentic to the traditional sash design, which has been popular for centuries. We have kept with the characteristic deep bottom rail, Georgian bars, central transom and fitch lock. Sliding sash windows can be opened at either the top or bottom for ventilation and to keep your home secure, a restrictor can be engaged to give ventilation without needing to open your window completely. For practicality both sashes on uPVC can be tilted inwards for easy cleaning.

A timber sliding sash window painted white with gold lift hook

A white wooden sash window slightly open

Innovative, smooth running mechanisms

There are two types of opening mechanism available on sliding sash windows. Our uPVC sash windows are fitted with a modern weighted spring design called spiral balance, whilst on timber, you can choose between the authentic cords and weights, designed to balance the weight of the sash or the spiral balance opening mechanism. Both have been precisely engineered to ensure smooth running and easy finger touch opening, making Everest sliding sash windows effortless to open.

High-quality Sash Windows, guaranteed

  • 10 year guarantee on window including installation
  • 30 year guarantee against rot & fungus on timber windows

VIEW ALL GUARANTEES

White uPVC sash windows in a bathroom

Commonly Asked Questions

  • +
    Can you have double glazed sash windows?
    Double glazed sash windows are an ideal choice for conservation areas or for those who wish to maintain the look and feel of a period property. You can opt for an authentic timber sash look or a maintenance free uPVC option available in woodgrain finishes.
  • +
    What is the sash part of the window?
    The window sash is the part of a window that opens and holds the glass and framework around the glass to keep it in place. Window sashes are extremely important to the overall construction and stability of the window. It is imperative that vinyl window sashes are multi-chambered and reinforced to prevent distortion. If a window sash is distorted, then this could cause issues with leakage and locking of the window itself.
  • +
    How does a sash window work?
    Sash windows are comprised of one or two vertically sliding sashes. To enable the window to remain open a series of clever counterweights connected via a sash cord or a big spring called a spiral balance hold the window open. The sash cord runs over the top of a pulley along the top rail.
  • +
    What is the difference between sash and casement windows?
    The most important difference is that sash windows open vertically and casement windows normally open out or in like doors. Sash windows are the traditional window design and at Everest we feel have a classic timeless style that look great in old and new houses alike. A casement window is a modern variant being more practical and offering benefits such as better security as the lock is constructed within the frame and ease of cleaning. Sash windows are more complex in construction and can require some maintenance unlike casement which is very much fit and leave.
  • +
    Can I replace my sash windows with casement windows?
    Before you look to replace sash windows with casement windows it is important you check with your local authority. In some instances, for example if you live in a conservation area or a listed building, it may not be possible to place your sash windows with a modern casement window design or you may need to apply for planning permission. You will also need to consider your local area, to ensure that any change you make is in keeping with your neighbours. Additionally, it is worth considering if replacing your sash windows with casement windows would make the property less desirable for future owners.

    Read more: Do you need planning permission for windows...
A home fitted with uPVC sliding sash windows
Case Study

Sash uPVC Windows

5 star rating 5 out of 5 on TrustPilot

We love the authentic looking wood grain effect and we’re so pleased that we chose silver furniture, as we feel it adds a vintage feel to the sash windows at the front of the house. Mrs F, West Sussex

VIEW CASE STUDIES

Everest Window Reviews

Trustpilot

Advice and inspiration

Do I need planning permission for windows


Planning permission

Discover if you need planning permission for replacing your old windows.


READ MORE

Window design ideas


Window design ideas

A selection of window designs to give you inspiration for your home.


READ MORE

How to choose replacement windows


Replacement windows

Everything you need to know about replacing your old windows.


READ MORE

Start Your Project Today...

Book your free quotation appointment with one of our local expert consultants who will:


  • Provide an accurate, no-obligation quote
  • Offer ideas and practical solutions
  • Show you samples of our products
  • Take all necessary measurements

Sorry, something you've entered isn't correct. Please check the form.

    GET A FREE QUOTE

     

    By providing your details above you agree to be contacted under the terms of our privacy policy.

    Made in Britain

    Made in Britain is an initiative set up to highlight the importance of products being manufactured in Britain.

    BSI

    Certified to ISO 9001, the most recognised quality management standard from The British Standards Institute.

    Secured by Design

    Secured by Design is a UK police initiative promoting products that help reduce crime.

    FENSA

    FENSA have accredited Everest's installation of replacement windows, doors and rooflights in existing dwellings.

    Trustmark

    Trustmark is a goverment edorsed not-for-profit organisation that operates through more than 30 scheme operators