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Sliding Sash Windows with up to 40% off in Ipswich, Essex and Suffolk

Our bespoke sliding sash windows are available in high-performance uPVC, providing authentic period charm combined with innovative modern benefits, including superior thermal capabilities, weather-resistance and home security. They can be fitted with either our advanced ECOMax double glazing or Comfort Glass, dependent on your specific requirements.

You can choose from a number of authentic woodgrain effects for classical aesthetics, or for a more unique appearance, they can be finished in 150 attractive RAL colours. To complete their custom design in the buying journey, our sash window furniture includes authentic sash lifts, fasteners and pullers in a variety of beautiful finishes.

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    White bay sliding sash window

    Super Slim

    With a width of just 35mm, our meeting rail, the slimmest on the market, delivers unrivalled aesthetics.

    Traditional Horn

    Smooth run-through sash horns with no revealing cap lines or wraparounds

    Optional Deep Cill

    Recreate the authentic timber look with a deeper cill option available

    What is a sliding sash window?

    Sliding sash windows were a common sight in Georgian and Victorian homes and consist of a movable panel that allows you to easily control the ventilation in your home. Our sliding sash windows allow you to retain the original character of your home while improving its performance. They offer a simple operation with the use of tensioned balances. Either sash can also be tilted inwards to allow for easier cleaning. Spring balances are concealed within the framework for easy adjustment and eliminating the need for cords. With traditional features such as an oval-shaped frame and classic sash horns, the authenticity is retained, and they can be approved for use in conservation areas.

    Why choose a sliding sash window?

    Slimmer than most

    Featuring a sleek 35mm midrail, our sliding sash windows are slimmer than most.

    Limitless customisation

    Designed to redefine classic sash windows, custom designs include run-through sash horns, no horn and deep cill options.

    Superior security

    Installing one of the most secure uPVC sash windows available, our sash window security features include innovative internal sash interlocks and optional laminated double glazing.

    Low maintenance

    Our uPVC sliding sash windows offer a maintenance-free design that won't rot, crack, warp, or fade throughout its lifespan (unlike real timber).

    Sustainably sourced

    As well as offering EcoMax Glass as standard, our sliding sash windows are created from 80% recycled manufacturing off cuts.

  • Colours
  • Glazing
  • Advice + Guidance
  • Colours

    Our finishes consist of popular wood effect finishes available in white, white woodgrain, cream woodgrain, light oak, Irish oak and rosewood. Or get the exact window colour you envisaged with over 150 striking RAL colours to choose from.



    White Woodgrain

    White Woodgrain



    Cream Woodgrain

    Cream Woodgrain

    Golden Oak

    Golden Oak

    Irish Oak

    Irish Oak




    Both ECOMax double glazing and Comfort Glass are available with our innovative sliding sash windows and we can also offer a range of textured and patterned glazing for added privacy or decoration. The benefits of upgrading your glazing are truly limitless - the most notable features include increased warmth, reduced energy bills & beating future energy price hikes. For complete peace of mind, we also offer toughened glazing options to enhance your home security further.

    The benefits of upgrading your glazing are truly limitless - the most notable features include increased warmth, reduced energy bills & beating future energy price hikes. For complete peace of mind, we also offer toughened glazing options to enhance your home security further.

    Advice + Guidance

    Sliding sash windows to suit period and modern homes across Essex

    Our heritage vertical sliding sash windows will effortlessly complement older properties, seamlessly blending with the elegant exterior. Yet, with our plethora of colour and finishing options, they can also add a unique character to modern properties. Whether you’re looking for classic white sash windows, timber effect uPVC sash windows or sophisticated Chartwell green sash windows, we can cater to every homeowner’s personal tastes. Our sliding sash window collection can even be designed in dual-colour options, so the outer and inner colours are different, perfectly suiting your home’s exterior and interior.

    Our sash window furniture range offers an assortment of original features, including Brighton fasteners, sash horns and sash pulls. We can also incorporate additional elements to further add to their unique design. Their genuine appearance and close eye to detail in replicating traditional joinery techniques mean they are commonly approved for listed buildings and conservation areas where building regulations restrict home improvements.

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    White uPVC sliding sash windows
    Close up of sliding sash window

    uPVC sash windows in Essex, Suffolk, and East London

    uPVC wood effect sliding sash windows are a popular choice with homeowners looking for the traditional timber appearance but wanting the latest benefits of uPVC. uPVC tends to be the most cost-effective replacement window material due to its modern manufacturing that makes it readily available.

    Ultimate Rose uPVC sash windows are exceptionally thermally efficient as they boast an innovative multi-chambered window profile that keeps the warmth inside and the cold elements out. This multi-layered structure, accompanied with a range of industry-leading security features, means they’ll protect your home from unwanted intruders. Unlike other materials, uPVC sliding sash windows boast a maintenance-free life that can last up to 35 years, so you won’t need to worry about any upkeep other than the occasional wipe down with a damp cloth. They won’t rot, warp or split, even when exposed to harsh weathers. We finish our uPVC windows in an anti-fade coating to keep them looking as good as new.

    Based on the authentic Victorian design, our elegant uPVC sash windows have the classic charm that will suit any home with their exceptional replica design. Imitating the traditional joinery techniques, and with authentic woodgrain textures and finishes, homeowners are unable to even tell uPVC wood effect sash windows apart from real timber sash windows.

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    Thermally insulating sliding sash windows

    Our uPVC sliding sash windows are manufactured to provide industry-leading A-rated thermal performances. This is attained through a number of inventive features, including our advanced double glazing that boasts low U-values, beaded frames and tightly fitted sash panels, so you can be assured it’s a draught free design. With their high-performance configurations, you’ll save money on your heating bills.

    Our ECOMax double glazing incorporates two layers of high-quality glass that encompass an argon-gas filled chamber. This eliminates the heat from escaping, and in the summer lets the cool air in for an optimum indoor climate.

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    Classic sliding sash windows
    Full installation of sliding sash windows

    Replacement sash windows to heighten your South East home’s security

    With a unique sliding opening functionality, our sash windows are fitted with their very own security features to maximise their protection. This includes sash fasteners that prevent the window from being opened from outside and inside, sash window stops that limit the opening of the window sashes, and meeting rails which eliminate any possibilities of the window being picked or forced open. We also incorporate safety latches that allow each sash to tilt inwards.

    Our sash windows have been thoroughly tested to exceed security standards, giving you peace of mind that your home is safe and secure. We can even include additional security features to further increase their security.

    With our high-performance uPVC sliding sash windows, you can be assured that not only are you upgrading to an attractive and stylish option, but an exceptionally robust and durable window solution.

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    Your Window and Door Journey with SEH BAC

    Replacing your windows and doors is easy.


    Choose the right windows and doors

    Fill out a form online or visit one of our 11 showrooms to see our range of high-quality windows and doors up close and speak to our expert team for any advice on materials, styles, colours, energy efficiency and glazing. Once you are happy with your choice, we’ll provide you with a free no-obligation quote.


    Place your order with us

    When you want to go ahead with your order, the details have been approved, and we have received your order deposit, our administration team will provide your contract to a surveyor.


    Your surveyor assessment

    The surveyor will contact you to arrange a date that is convenient to come to your home and review the project scope, take accurate measurements and discuss any other matters that need to be considered. We will then confirm the surveyor’s assessment.


    Confirm an installation date

    Our installation department will contact you to arrange a date for your window and/or door installation and your products will be ordered and manufactured, using cutting-edge techniques and industry-leading materials.


    You're ready for your installation

    On the day, our skilled team will arrive at the agreed time to install your products, ensuring minimal disruption. They’ll explain the locking and opening systems and share maintenance tips to keep your products looking brand new. Once your installation is complete, we will contact you to confirm that everything has been finished.

    Frequently Asked Questions

    Find all the answers to our most frequently asked questions below.

    How much will new sliding sash windows cost?

    There are many aspects to consider when purchasing new windows, such as material, thermal performance and whether it's been accredited by industry bodies to ensure its quality. To accommodate the majority of budgets, we offer a range of comprehensive finance options, including 2 years interest free credit & buy now pay later - £99 deposit. Find more information on double glazed window prices here.

    How do I know if my windows need replacing?

    Modern double glazing lasts at least 20 years, but there are certain tell-tale signs you need to look out for. Read more

    Which window material is best?

    The first decision you need to make is which window material is right for your home. Your final decision will be heavily influenced by your own personal choice, budget, property appearance and building era.   Read more

    What is A rated double glazing?

    Energy efficient home improvements are incredibly important, so if you're wondering how to tell what A rated glazing is you're not alone! Read more

    Begin Your Project

    Get your free quote – with no-obligation to buy. Simply fill in the form below to get started:

      By submitting your details you confirm that you agree to the storing and processing of your personal data by SEH BAC as described in the privacy statement.


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      Multi-award winning company

      Here at SEH BAC, we’re proud to have won many prestigious awards for our products as well as our work in the community:

      Installer awards 2022
      G21 Finalist
      SEHBAC showroom winner
      Ultraframe designer winner
      Conservatory and orangery awards winner 2019
      NHIC 2018 Consumer confidence award
      G17 Installer of the year
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      We’re one of the largest

      regional retail companies

      Vetted for professionalism, competency & compliancy

      Improving South East homes for more than 50 years

      With 9 show centres across the South East, you’re not far away from achieving your dream home:

      See all of our show centres

      Our Accreditations

      BSI ISO 9001:2015
      BS 7412
      FENSA Approved
      TSI Approved Code
      Ultra Installer
      QA National Warranties