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Double Glazed uPVC Sash Windows

If you’re in the market for new sash windows, you’ve come to the right place. Sash windows are a classic and elegant choice for any home, and they can add a touch of traditional charm to any room. Whether you’re looking for a modern twist on this timeless design or you want to stick to the traditional style, there are plenty of options to choose from. From materials to colours to hardware, you can customise your sash windows to perfectly fit your home’s aesthetic. Plus, with their energy-efficient design, sash windows can help you save on your energy bills while still enjoying plenty of natural light. So if you’re considering sash windows for your home, be sure to explore all the options available to find the perfect fit for your home.

At Colin’s Sash Windows, we are committed to help you with the best suitable windows to give your house a new look. Our uPVC sliding sash windows are manufactured in the UK, supplied nationwide and exported worldwide. Unlike many suppliers, we always give the best price possible to all customers first time – homeowners or trade.

upvc sash window white
Edwardian Sash Windows
Designed to replicate traditional timber sash windows whilst incorporating the benefits of uPVC. Our sash windows operate like traditional box sash windows – both the top and bottom sashes slide up and down as standard, and most of them tilt inwards for easy cleaning. They are also double glazed, A energy rated. All our sliding sash windows are made-to-measure and delivered to your property ‘ready to fit’. Since they come with a 10-year warranty, you don’t have to worry about your investment.

Why Choose Sash Windows?

Sash windows are a timeless and elegant choice for any home. Their classic design adds charm and character, while their functionality allows for easy ventilation and cleaning. With their traditional look and modern features, sash windows are a perfect blend of style and practicality for any homeowner.

Since 2014 we’ve become the market leaders for uPVC Sliding Sash Windows! You won’t be disappointed by our competitive prices. Check our measuring guide, get your sizes and ask for your sash windows online quote!

Tradition With Technology

Our sliding sash windows are manufactured using the SPECTUS uPVC profile designed to truly emulate traditional heritage frames. Featuring woolpile strips that provide an excellent seal against weather, air and debris infiltration. ‘Low E’ glass together with a warm edge spacer bar provide exceptional heat retention, and a superior ‘A’ energy rating. An innovative dedicated weather bar add another level of defense against rainwater – an extra feature unique to this type of window. Designed with not only elegance and authenticity in mind, but security too. The sliding sash windows are multi-chambered and reinforced to prevent deflection through different climates.

Our vertical sliding sash windows ensure that your home retains its character and charm. You can choose from a wide range of styles (including the Georgian sash windows style) features and hardware options to complement your home.

  • Custom made
  • Low maintenance – no sanding or painting
  • Easy clean facility
  • Safe and secure
  • Weather resistant
  • Energy efficiency – A rated
  • Authentic woodgrain effect available
  • 10-year guarantee
  • Made in UK, delivered nationwide

How to order? Check our blog here.

Enhanced uPVC Sash Window for Your Home

White uPVC

White uPVC Sash Window
£270 – £350  + VAT
800 mm <–> 2100 mm
375 mm <–> 1200 mm

FROM £270 + VAT

  • Double glazed – argon gas filled, Low E glass
  • White furniture
  • ‘A’ energy rated, 1.4 U-Value
  • Warm edge spacer bars
  • No sash horns
  • Trickle vents
  • Toughened glass on the bottom sash
  • 150mm stub cill
  • Fast UK delivery from 3 weeks
  • Small delivery charge applicable for orders less than 4 windows or if you are based in Ireland

* Any other feature is extra charged. Bigger sizes (up to 1500mm wide and 2600mm high) available for a small extra charge as well. 

Woodgrain uPVC

Woodgrain color uPVC Sash Window
£337 – £417 +VAT
800 mm <–> 2100 mm
375 mm <–> 1200 mm

Add any of the below features for more authentic heritage look:

Slim Midrail
£50 +VAT
Slim midrail
Run through sash horns
£25 +VAT
Run through horns
Mechanical joints
£100 +VAT
Mechanical joints

* Seamless welding and Mechanical joints available on woodgrain only 

Standard Woodgrain Collection

  • White sash color
  • Anthracite Grey sash color
    Anthracite Grey
  • Cream sash color

Dual Foils Collection

  • Agate Grey / Heritage White
  • Anhtracite Grey / Heritage White

Special Woodgrain Collection

  • Chartwell Green sash color
    Chartwell Green
  • Agate Grey colour
    Agate Grey
  • Irish Oak sash color
    Irish Oak
  • Black Brown sash color
    Black Brown
  • Golden Oak sash color
    Golden Oak
  • Rosewood sash color

Choose from a wide range of colours. As standard our sash windows come in a smooth white finish but you can also have them sprayed in any RAL colour.

If you want a more natural look our woodgrain colour selection is the right choice. The foiled finishes bring windows to life with a woodgrain effect that never needs painting. Dual colour finishes are also available: meaning a coloured exterior can be paired with a smooth white interior to keep its effect on the room neutral. Our special woodgrain colours are available with longer lead time.

We are now offering woodgrain sash windows windows with seamless welds making the joints almost invisible. We also offer sash windows with mechanical joints to further replicate the look of timber. Click here for details

  • White furniture
  • Black furniture
  • Antique black furniture
    Antique Black
  • Satin furniture
  • Chrome furniture
  • Graphite furniture
  • Gold furniture
  • Bronze furniture

High quality hardware is fixed to integral reinforcements for reliable and smooth opening. The optional travel restrictors stop both the top and bottom sashes from opening more that 100mm. The safety restrictor is non-locking and auto-engages when the sash slides past. They are primarily used as both a safety and security feature. The hooks and pole eyes come loose so you can decide whether you`d like them or not.

As standard, each window is supplied with white furniture including lock, pole eyes and sash pulls. With all optional finishes, you will find exactly the right match for your taste. Heritage style hardware also available.

* Note – our travel restrictors are an extra feature and only available in white, chrome, gold and satin silver

Choose between the extra features for your trade uPVC sash windows we offer while keeping the exceptional energy saving capabilities and durability of the material:

  • Astragal bars
    Astragal Bars
  • Georgian bars
    Georgian Bars
  • Run-through sash horn
    Run Through Sash Horns
  • Seamless welding
    Seamless Welding
  • Trickle vents sash windows 1
    Trickle Vents
  • Deep bottom rail
    Deep Bottom Rail
  • Obscured glass 2
    Obscured glass
  • Sill sizes
    Bigger sills
  • Arches
    Arched Sunburst Layout
  • Fire escape sash windows
    Fire escape hinges
  • PAS 24
    PAS 24
  • Frame extenders sash windows
    Frame extenders

Our vertical sliding sash windows can be manufactured to a style to suit your home. Here are a few examples of the bar layouts available. Georgian sash windows are very popular. We supply them with authentic astragal bars. For more information on Georgian windows click here. Our windows come with equal sized top and bottom sashes (50/50 split) as standard, however we are able to manufacture other split ratios at your request (minimum transom drop of 350mm).

  • Non bars window style
    Non Bars
  • Three light window style
    Three Light
  • Three offset light window style
    Three Offset Light
  • 2/5x3/5 window style
    2/5 x 3/5
  • Asymmetric window style
  • Margin window style
  • Half georgian window style
    Half Georgian
  • Georgian window style
  • Georgian variant window style
    Georgian Variant
  • Fire egress window style
    Fire Egress A
  • 1/3x2/3 window style
    1/3 x 2/3
  • Swept head window style
    Swept Head
  • True arch window style
    True Arch

White uPVC Sash Window

Spectus uPVC Profile

Frame Depth128mm
Corner DetailWelded
Meeting Rail50mm
Run-through Sash HornsOptional Extra
WoodgrainOptional Extra
Seamless WeldsOptional Extra
Deep Bottom RailOptional Extra
20mm Astragal Bar/sOptional Extra

UK Postcode Area Map Delivery

Integral blinds for your sash windows

We’re pleased to offer our sash windows with built in blinds. The double glazing has venetian blinds in between the 2 panes of glass with a magnetic slider control on the left or right side to move them up and down and open/close. They’re available in white, silver and cream colours.

Obviously they’re more expensive than traditional blinds but there are no unsightly cords to get tangled up and they don’t need to be cleaned! With our climate becoming hotter and sunnier at times they’re perfect for deflecting sunlight during the hottest part of the day. Integral blinds cost around £ per sash window (1 blind in the top sash and 1 blind in the bottom).

We offer a bigger range of colours for our normal uPVC windows including blackout blinds which are very popular in children’s bedroom windows and cinema rooms. Please take a look at our Integral Blinds page for more information.

Sash windows integral blinds


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Fax 01525 552141

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