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Sliding Sash Windows in Bromley and Dartford, to Maidstone and Sevenoaks

Sliding sash windows became popular in the Georgian period and were the window of choice for the following two centuries and reached their peak of popularity in the Victorian era. Sliding sash windows have seen a resurgence in popularity and are now being used in both period property replacements and in new build homes to add character.

Our collection of bespoke sliding sash windows can be installed with uPVC frames. And you can choose from an abundance of customisation and furniture options, including over 150+ RAL colours, for the perfect design to meet your individual tastes.

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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?

    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.

    Timeless elegance

    Sliding sash windows offer timeless elegance, making them a perfect fit for period properties or those seeking classic charm.

    Peace of mind

    Backed by a 10-year guarantee and a commitment to exceptional craftsmanship and customer satisfaction.

  • Colours
  • Glazing
  • Furniture
  • Additional Features
  • Available across Kent
  • Colours

    Our realistic wood effect finishes are available in white, white woodgrain, Irish oak, cream woodgrain, light oak, and rosewood.

    White

    White

    White Woodgrain

    White Woodgrain

    Cream

    Cream

    Cream Woodgrain

    Cream Woodgrain

    Golden Oak

    Golden Oak

    Irish Oak

    Irish Oak

    Rosewood

    Rosewood

    Glazing

    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.

    Furniture

    Authentic furniture for your sliding sash windows

    Authenticity for your sliding sash windows doesn’t start and finish with the frame – the furniture must have traditional styling too. Traditional sash rings and a tilt latch operating knob complement a top sash handle that provides easy opening and closing. All furniture is available in chrome, gold, white and satin finishes.

    Furniture Options

    D-Handle Top Sash

    D-Handle Top Sash

    Lift Bottom Sash

    Lift Bottom Sash

    Tilt-Latch Opening Knob

    Tilt-Latch Opening Knob

    Offset Sash Ring

    Offset Sash Ring

    Sash Ring

    Sash Ring

    Furniture Colour Options

    Black Finish

    Black Finish

    Brass Finish

    Brass Finish

    White Finish

    White Finish

    Chrome Finish

    Chrome Finish

    Steel Finish

    Steel Finish

    Additional Features

    Authentic furniture for your sliding sash windows

    Authenticity for your sliding sash windows doesn’t start and finish with the frame – the furniture must have traditional styling too. Traditional sash rings and a tilt latch operating knob complement a top sash handle that provides easy opening and closing. All furniture is available in chrome, gold, white and satin finishes.

    Authentic Timber Look Cill

    For an even more authentic look, our Radlington Cill is a superior upgrade to our standard cills. Comprising of deeper nosed cills, one at the standard 30mm height and another at a 55mm height, these are modern interpretations of timber cills.

    Overhead Ventilation

    Our overhead concealed ventilation features an overhead slot vent system that incorporates the ventilation in the head drip, meaning the external trickle vent is concealed on the head of the outer frame, providing a much-improved finish.

    Available across Kent

    Wide range of window styles across Kent and the South East

    At Fineline Windows, we take pride in transforming houses into homes by providing top-quality double glazing solutions. With a passion for excellence and a commitment to customer satisfaction, we have become the go-to choice for homeowners across Kent and the South East seeking to enhance the beauty, energy efficiency, and security of their properties.

    Our dedicated team of experts combines skill, precision, and a wide range of window options to cater to your unique needs and preferences. Whether you're looking for stylish uPVC windows, energy-efficient double glazing, or durable aluminum frames, we have the perfect solution for you.

    Explore our exceptional double glazing services in the following locations across Kent and the South East:

    Enhance the comfort, aesthetics, and value of your home with Fineline Windows. Connect with us today and let us make your dream of beautiful, energy-efficient windows a reality. Your satisfaction is our mission!

    Sliding sash window styles to suit any Kent home

    When it comes to traditional styling, it’s all in the detail. At FineLine, we’ve developed uPVC sliding sash windows which perfectly replicate the period detailing. From classic sash horns to astragal bars, their authenticity won’t be beaten. With over 150+ RAL colours to choose from and a vast range of window furniture options, we can ensure the ideal aesthetic to suit your property, both old and new. With their heritage style, they can effortlessly complement period properties, whilst their charismatic design can also inject character to more newer homes.

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    Grey sliding sash installation on modern home
    Vertical sliding sash windows in orangery

    uPVC sliding sash windows for conservation areas

    As sliding sash windows have a unique vertical opening mechanism, they have their own range of window furniture pieces to choose from. They have been carefully made to replicate the original features seen on traditional sliding sash windows. It includes Brighton fasteners, sash horns and sash pulls, all of which are available in a number of authentic colours.

    Due to the close attention to detail in the design, our sliding sash windows are approved for use in conservation areas where homeowners are restricted with home improvements. With traditional joinery techniques and a hand-crafted finish, their provide a genuinely authentic appearance.

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    Double glazed sliding sash windows will improve energy efficiency

    If you live in a period property with its original sash windows, you may have noticed that they struggle to retain heat and let the draughts in. That means it could be time to replace your windows. When you choose our uPVC sliding sash windows, you’ll instantly benefit from improved thermal performances in your home. They can achieve A energy ratings, and our advanced double glazing boasts U-values as low as 1.2 w/m2K. This means that energy wastage will be reduced, so you’ll be able to save money on your heating bills.

    We use pioneering double glazed panels which involve two panes of glass that surround an argon-gas filled chamber. This effectively breaks up currents of air, and along with multi chambered frames will keep your home at a comfortable temperature all year round.

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    White uPVC sliding sash windows
    Classic sliding sash windows

    Low maintenance sliding sash windows

    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.

    Upgrade your home’s security with durable windows

    If you’re looking to heighten your home’s security, then our sliding sash windows are the ideal solution. Because of their vertical opening, they have their own security features to ensure that your property is protected. This includes sash fasteners to stop the window from opened from the outside, sash window stops which restrict the opening of the window sashes and robust meeting rails which keep the window resilient to forced entry. Safety latches are also included which enables the sash to tilt inwards.

    Our range of durable sash windows have been tested to strict security regulations. For homeowners looking for even further protection, we can include additional security hardware into your bespoke design.

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    sliding sash windows

    Compare Window Styles

    Casement Windows

    Casement Windows

    • Available in high-performance uPVC or aluminium
    • U-values as low as 0.8 W/m2K
    • Multi-point locking system
    Bay Windows

    Bay Windows

    • Available in high-performance uPVC or aluminium
    • U-values as low as 0.8 W/m2K
    • Multi-point locking system
    Heritage Windows

    Heritage Windows

    • Made from uPVC to replicate timber
    • Achieve A++ energy ratings
    • Multi-point locking system
    Flush Sash Windows

    Flush Sash Windows

    • uPVC authentic timber flush sash window
    • U-Values as low as 1.3 W/m2K
    • Multi-point locking system
    Tilt & Turn Windows

    Tilt & Turn Windows

    • Available in high-performance uPVC or aluminium
    • U-values as low as 1.0 Wm2K
    • Multi-point locking system
    Conservation Windows

    Conservation Windows

    • Made from uPVC to replicate timber
    • Achieve A++ energy ratings
    • Multi-point locking system
    Bespoke Windows

    Bespoke Windows

    • Available in high-performance uPVC or aluminium
    • U-values as low as 0.8 W/m2K
    • Multi-point locking system
    uPVC Windows

    uPVC Windows

    • Robust and durable frames
    • Available in seven styles
    • 20 years life expectancy, maintenance free
    Aluminium Windows

    Aluminium Windows

    • Minimalist frames and sightlines
    • Available in four styles
    • Available in four styles Over 30 years life expectancy, minimal upkeep

    Your Window and Door Journey with FineLine

    Replacing your windows and doors is easy.

    01

    Choose the right windows and doors

    Fill out a form online or visit one of our 10 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.

    02

    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.

    03

    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.

    04

    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.

    05

    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.

    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 FineLine as described in the privacy statement.

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      Multi-award winning company

      Here at FineLine, 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 show centres across the South East, you’re not far away from achieving your dream home:

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