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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 either uPVC or timber 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.

Compare Our Sliding Sash Window Materials

uPVC Wooden
Colours 150+ RAL colours and 8 woodgrain options, with optional dual colour designs. 150+ RAL microporous painted colours and a range of authentic wood effects, with optional dual colour designs.
Glazing Double glazing, as well as additional decorative glazing. Double, triple or secondary glazing options, as well as additional decorative glazing.
Energy Efficiency A fully welded 6 chamber profile can achieve A+ energy ratings, and U-values of 0.8 W/m2K. Using a singular pane of treated hardwood, it’s A+ energy rated. With U-values as low as 0.8 W/m2k, it conforms to BS5713.
Security Modern sash window locking systems ensure that they exceed building regulation standards, including fasteners stops and meeting rails. Additional hardware can be included. Advanced sash window locking systems, such as lock fasteners, stops and meeting rails are fitted as standard to accomplish BS6206 standards. Additional hardware can be included.
Life Expectancy From 35 years with no maintenance required. The anti-fade coating keeps the material looking pristine. From 60 years. A coating of wood protection should be applied every 5-7 years.
Suitability A cost-effective choice, uPVC designs are flexible as well as being high-performance. Achieve the traditional timber aesthetic with the modern benefits that our responsibly sourced timber offers.
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Master Window & Conservatory Installers Association
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  • Browse materials

    Browse colours

    Our realistic wood effect finishes are available in white, white woodgrain, Irish oak, cream woodgrain, light oak, and rosewood. Use our Kolor Bond system to create the perfect shade for you.

    uPVC Colours

    White

    White

    White Woodgrain

    White Woodgrain

    Cream Woodgrain

    Cream Woodgrain

    Light Oak

    Light Oak

    Irish Oak

    Irish Oak

    Rosewood

    Rosewood

    Timber Colours

    Gloss White

    Gloss White

    Ebony

    Ebony

    Mahogany

    Mahogany

    Afromosia

    Afromosia

    Chartwell Green

    Chartwell Green

    Hawthorn

    Hawthorn

    Iroko

    Iroko

    Lavenham Blue

    Lavenham Blue

    Magnolia

    Magnolia

    Oak

    Oak

    Olive Green

    Olive Green

    Walnut

    Walnut

    Any RAL Colour

    Any RAL Colour

    Browse glazing

    Our sliding sash windows are double glazed for a warmer, safer home. Customise your frames and add Georgian bars in a variety of configurations.

    Textured glass

    Taffeta

    Taffeta

    Stippolyte

    Stippolyte

    Oak

    Oak

    Pelerine

    Pelerine

    Minster

    Minster

    Mayflower

    Mayflower

    Florielle

    Florielle

    Everglade

    Everglade

    Contora

    Contora

    Digital

    Digital

    Charcoal

    Charcoal

    Chantilly

    Chantilly

    Discover more glazing options

    The benefits of upgrading your glazing are truly limitless - the most notable features including 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.

    uPVC sliding sash windows in Tonbridge, Rochester and Canterbury

    Our uPVC vertical sliding sash windows combine the traditional timber style with the modern performance provided by today’s uPVC technology. Whilst uPVC is usually the more affordable option because it can be much more easily manufactured, thanks to the streamlined processes, it still offers exceptional performances.

    uPVC window frames are made with a pioneering multi-chambered frame which is able to break up the airflow. So in the winter, it will stop the cold elements from entering and in the summer they’ll keep the heat out. This multi-layered design is also beneficial for weather resistance as it’s robustness is heightened, so it will keep your home protected from even the harshest weathers. We finish our uPVC window frames in a protective coating, so that they won’t fade, rot or split over their lifetime, which is at least 35 years. They’re maintenance free, making them the ideal window upgrade for busy homeowners.

    Our uPVC sliding sash windows replicate the traditional timber design, using similar joinery techniques and a woodgrain textured finish to attain the heritage aesthetic. With over 150+ RAL colours and a number of authentic woodgrain effects, it’s an incredibly versatile window solution.

    White uPVC sash windows installation
    White timber sliding sash window

    Authentic timber sliding sash windows

    It’s no wonder that wooden sliding sash windows are still so popular with homeowners today. They provide sophistication and elegance that will add character to any home they’re installed on. And their timeless design makes them a great investment to add value to any property. Choose from over 30 colours and a variety of wood effects for a design that will perfectly suit your home.

    As wood is a naturally insulating material, upgrading to our high-performance timber sliding sash windows will significantly increase your home’s energy efficiency, keeping it insulated and warm in the cooler months. They’re made from only the highest quality materials to maximise their resilience and protection from both forced entry and tough weather conditions.

    Timber sliding sash windows can last for 60 years, and because we use a protective outer coating, the natural materials only need minimal maintenance to protect the wood. You should apply wood protection every 5-7 years to eliminate the occurrence of rotting or cracking, and this will also help them to continue to look like new.

    We use only sustainable sourced timber from responsibly managed forests. This makes replacement timber sliding sash windows an environmentally friendly option that will help to reduce your home’s carbon footprint.

    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. Whether you choose our uPVC or wooden sliding sash windows, you’ll instantly benefit from improved thermal performances in your home. Dependent on the specification, 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, keeping your home at a comfortable temperature all year round.

    White uPVC vertical sliding windows
    uPVC bay sash window

    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.

    Buying a product through FineLine offers you real peace of mind

    Customer promise

    We have the knowledge and experience to provide you with exactly what you need. Our staff are expertly trained to guide and advise you. We offer you a 10 Year Guarantee.

    Read our customer promise

    We are one of the largest Fensa Aproved regional retail companies.

    Our Accreditations

    BSI 9001 2015
    Fensa Approved Installer
    TGAS
    Trustmark
    Ultraframe conservatory installer

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