A new front or back door for your home in Bromley and Dartford, to Maidstone and Sevenoaks

From front and back doors to sliding patio and bi-fold doors, you’ll be spoilt for choice with our range of double glazed doors. All our doors are available in a range of striking colours with your choice of modern and traditional hardware to suit your home’s existing character.  Choose from uPVC, aluminium, or composite materials depending on your requirements and budget.

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    The perfect front door to complement your home

    Being the focal point of a home’s exterior, a new front door has the ability to totally transform your property’s kerb appeal. With an extensive history behind us, we can advise on the best styles for your individual requirements as we offer an extensive range of door designs. Whether you reside in a listed property or a modern new build, we can offer a range of designs for you to choose from, including heritage doors and black composite front doors.

    With over 150 RAL colours to decide between, every Kent homeowner is able to find their perfect aesthetic. From monochromatic grey, black or white, or classic woodgrain appearances, the selections are endless! Made-to-measure, we will also incorporate decorative furniture and bespoke glazing for a new door that is sure to impress your guests.

    View our RAL colour chart
    Chartwell green composite front door
    An open white uPVC sliding patio door

    Replacement double glazed back doors

    The back of your property is just as important as the front, especially for home security. Our replacement back door range includes bi-fold doors, sliding patio doors and French doors. Just like our new front doors, you can decide between our four durable materials and a variety of attractive colours for a tailor-made solution.

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    Home improvement experts across Tonbridge, Rochester and Canterbury

    For over 50 years we’ve been installing home improvements, including quality doors, to customers across Kent. At Fineline, we’re experienced in both domestic and commercial projects, so no installation is too difficult for us. We are mountains ahead of the competition, see our Trustpilot scores to prove it!

    Our staff are excellently trained and work to meet industry regulations, maximising the security of your home. We know Kent like the back of our hands, not being a national installer means our local knowledge helps us to find the best options for your home. You won’t find a more committed team of friendly specialist experts whose priority is to our customers.

    At Fineline, we’re large enough to have full expertise in house and no jack of all trades but we’re small enough to care about each and every homeowner, no matter how small the project. We’re committed to our customer’s projects like they’re our own, meaning you’ll get honest advice and outstanding services.

    See our 9.5 trustpilot score
    Grey uPVC front entrance door
    Grey uPVC front door

    The most effective way to secure your Kent home

    Being the initial entry access to a property, its vital that your front and back doors are made from robust and long-lasting materials. Tired and weak looking doors are commonly sought by intruders as they’re easier to break into. As leading double-glazing installers, we manufacture our new doors from high-quality materials, using pioneering fabrication techniques to maximise their durability. Their sturdy door panels, tightly fitted frames, multi-point locks and toughened glazing work together to provide a resistant door that will stay intact from the toughest forces.

    For peace of mind, our replacement doors are rigorously tested to ensure their protection from common burglar techniques, including lock picking and drilling. As our doors are custom designed, we can include additional security features, such as security chains and night latches.

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    A new door that will reduce your carbon footprint

    With a new door, you’ll notice that the temperature inside of your home is more comfortable all year round as they are designed to be draught-free, so cold spots are eliminated. So, by upgrading your doors, you’ll even save money on your heating bills, making them an even better investment.

    Our doors can achieve A+ energy ratings, the best capabilities available on the market. Their inventive designs incorporate features such as advanced double glazing or comfort glass, edged spacer bars, chambered door frames, airtight profiles and thermal break barriers. Together, they resist energy loss, retaining the warmth inside of the room.

    Door buying process
    Timber French Door
    Oak effect uPVC bifold door in Bromley.

    Award-winning and accredited new front doors

    Our unique collection of awards and accreditations make us stand out from our competitors. We’re the G Award’s Installer of the Year and Master Window and Conservatory Installers Association company of the year. We haven’t peaked here, as part of the SEH group, we’re nominated for even more awards. Our accreditations put us miles ahead.

    See our awards and accreditations

    Competitive door prices

    If you are looking for replacement doors that won't cost you an arm and a leg, look at our expansive range of doors. We compete with our competitors in all aspects, including costs. With our flexible finance options, you can be sure to get a quality installation to meet your budget.

    Finance Options
    Aluminium front door


    All of our doors offer excellent thermal benefits for you and your family; saving you money on your heating bills. All of our doors provide efficient weatherproofing to keep your home warm and comfortable all year round.



    Offering acoustic as well as thermal insulation, our doors will successfully block any unwanted noise pollution. The right choice for those living near busy roads, under flight paths or in town and city centres.



    Your security is as important to us as it is to you. With a range of locking mechanisms available you can be assured that your home is safe and secure.



    From the first quote through to aftercare, the process is made as simple as possible for you. Our professional installers will carry out the installation swiftly and with the utmost care. Our customer service team will promptly deal with any other queries you may have after completion.

    Quality products Great prices

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    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
    Ultraframe conservatory installer