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

When homeowners in Kent require timeless flush sightlines that refuse to compromise on present-day performance, they turn to the exquisite FineLine collection for the answer. Elegantly imitating the natural woodgrain synonymous with time-honoured timber, wood effect flush sash windows outperform real wooden frames in efficiency, security, and style. Custom-designed to accommodate a plethora of property styles, from on trend Anthracite Grey frames to softening Agate Grey frames, choose from an assortment of fine painted and woodgrain finishes, as well as an extensive RAL window colour palette with 150+ shades to choose from. Available with advanced double or triple glazing, finish the look with three charismatic handle styles – standard, traditional or contemporary – complete with secure locking as standard. Your window & door journey with FineLine Windows.

What are flush sash windows?

Intricately made to seamlessly replicate the look of authentic timber, flush sash windows fit sleekly into the window frame, instead of slightly overlapping the window frame, for a smooth finish. Created from the highest quality and low maintenance uPVC, our flush sash windows deliver unmatched thermal insulation and weather protection, alongside intricate handcrafted details unseen on a timber alternative window – until now.

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  • Glazing IconGlazing IconBrowse glazing Tab arrow
  • Browse colours

    Choose from 10 realistic finishes and 1 smooth gloss finish. Or use our Kolor Bond system to create the window colour you've always dreamt of.

    Oak

    Oak

    White

    White

    Natural

    Natural

    Olive Grey

    Olive Grey

    White

    White

    Anthracite Grey

    Anthracite Grey

    Cream

    Cream

    Black

    Black

    Agate Grey

    Agate Grey

    Rosewood

    Rosewood

    Browse glazing

    As well as custom finish frames and classic Georgian bar detailing, enhance your warmth and security even further with high quality double glazing or tough triple glazing.

    Textured glass

    Taffeta

    Taffeta

    Stippolyte

    Stippolyte

    Oak

    Oak

    Pelerine

    Pelerine

    Florielle

    Florielle

    Minster

    Minster

    Mayflower

    Mayflower

    Everglade

    Everglade

    Digital

    Digital

    Chantilly

    Chantilly

    Charcoal

    Charcoal

    Contora

    Contora

    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.

    Can I put uPVC windows in a listed building?

    If you live in a listed building or a home located in a conservation area, extra care must be taken to retain the original look of the property. Unauthorised improvement work in designated areas can result in an unlimited fine, so if you're unsure whether your home is in a conservation area, get in touch with your Local Authority for clarity before going ahead with any work.

    High-quality timber replica windows (like ours!) are designed to pass strict regulations often imposed on listed buildings, conservation areas, Areas of Natural Beauty (AONBs), and other areas limited by protective Article 4 Directions. So, you have absolute peace of mind your home complies with the rest of the neighbourhood, whilst looking its very best at all times.

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    Evolution window
    Evolution window

    Flush sash windows with exceptional performance

    Flush sash windows are also renowned throughout the industry for their exceptional energy efficiency levels. Able to achieve A+ 11 – A+ 13 energy ratings with ease, choose between 28 mm double glazing or 32 mm triple glazing and instantly feel the difference; thermally, aesthetically, and economically!

    Utilising the latest multi-point shoot bolt security locks, chic lockable window handles, and a handy night vent facility for a secure flow of air when you need it most, with flush windows you’ll never have to worry about real-timber-related issues like pest infestation, dry rot, warping or twisting either. Simply sit back, relax, and look at your home from a different perspective with handcrafted timber-alternative windows from FineLine.

    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.

    TrustMark AprovedVetted for professionalism, competency & compliancy

    Our Accreditations

    BSI 9001 2015
    Fensa Approved Installer
    TGAS
    Trustmark
    Ultraframe conservatory installer