We're sharing our expert advice and double glazing tips

  • Windows
  • Doors
  • Conservatories
  • Windows

    How much do windows cost?

    Here at T&K, every window we install is tailor-made to your home. Therefore, we don’t offer standard window sizes and so are unable to offer set prices. Pricing will vary depending on the job. However, if you have concerns over cost, we offer a selection of finance options, including 3 years interest-free credit, which you can use to reduce your initial expenditure. You might also be able to get an energy efficiency grant via the GOV.UK website to help out further.

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    Bay timber vertical sliding windows interior view
    white upvc casement windows

    What types of window are there to choose from?

    We stock an eclectic mixture of windows so that we’re able to fulfil virtually any practical and aesthetic requirements. Choose from:

    Casement windows – available in uPVC, aluminium and timber
    Flush sash windows – available in uPVC
    Vertical sliding windows – available in uPVC and timber
    Tilt & turn windows – available in uPVC, aluminium and timber
    Residence 9 windows

    Browse our range

    Will new windows keep sound from entering my home?

    Yes, they will, although not entirely. Both our double and triple glazed windows can reduce the amount of sound coming inside your home significantly, especially compared to old glazing. As triple glazing tends to provide slightly better noise reduction than double, if you happen to live in a noisy area, possibly near a busy road or under a flightpath, it might be better for creating a quieter home. However, we can install Planitherm Comfort or Comfort Plus glass on either double or triple glazed windows. This type of glass offers 20% better noise reduction than older-style double glazing.

    White timber vertical sliding windows
    Oak effect Residence 9 window installation

    Will new windows make my home more efficient and reduce energy bills?

    The windows we provide at T&K are available with Window Energy Ratings (WER) of A++, which is some of the highest levels of thermal performance. These levels are usually only obtainable with triple glazing, however ratings of A+ are possible with double. Regardless, either set will certainly make your home more efficient, reducing your energy consumption and carbon footprint in the process.

    Also, the Energy Savings Trust estimates that you could save £80 a year on energy bills by installing A++ rated double glazing in a semi-detached home that is entirely single glazed.

    Our guide for making your home more efficient

    What is double glazing?

    Double glazing is a window that is made up of two panes of glass that are separated by a small cavity. For our windows, this space is filled with Argon or Krypton gas. These inert gases have a lower thermal conductivity than air, reducing the window’s ability to conduct heat significantly. This means less heat is able to make its way through the window so more of it is kept inside.

    Double glazing
    Irish oak uPVC casement window
    Grey aluminium top hung casement windows

    What is triple glazing?

    Triple glazing works in the same way as a double glazed window, however three panes of glass are used instead of two. Between the panes of glass are spacer bars constructed from insulating material and an inert gas, either Argon or Krypton. This enables the windows to retain even more heat inside the home than a double glazed window. The additional pane of glass also acts as another layer of sound insulation.

    Triple glazing

    Is double or triple glazing right for my home?

    This will depend on your personal circumstances. For most homeowners, T&K’s double glazing will be more than suffice. It provides more than enough acoustic and thermal insulation to make any homes warm, cosy and quiet. However, the increased sound reduction on offer with triple glazing can be very useful when external noise is particularly loud. Opting for triple does come with additional expense, though.

    Semi detached home with new white upvc windows
    Timber vertical slider interior

    Why is there condensation on my windows?

    In many cases, condensation forming on your windows is perfectly normal. It’s only when condensation begins to accumulate in between the panes of glass on a double or triple glazed window when you need to be concerned. If this has occurred, it’s a good indication that one or more of the window’s seals has broken. If you’d like more information on this issue, we’ve documented it in considerable depth. You can access our documentation of it by following the link below.

    Learn more

    Will I need planning permission for new windows?

    In most cases, planning permission will not be required for new windows, especially if the replacements are similar in appearance to your old ones. However, if you happen to live in an area where an Article 4 Direction is in place, planning approval might be required. If you’re unsure if one is in place, check with your local planning authority before any work is carried out.

    Any leaseholders might also need to get permission from either the landlord or management company before changing their windows.

    Rosewood uPVC casement window
    Black aluminium casement windows installation

    Will your windows secure my home?

    As a potential entranceway into your home, it’s understandable to have concerns over window security. However, both double and triple glazing are considerably more secure than single glazing, purely because of the additional panes of glass. To ensure the other areas of the window are secure, we strictly use a range of up-to-date hardware, such as multi-point locks and hinge protectors so you can relax in total peace of mind. Every aluminium window we install has also been Secured by Design certified, if you’re looking for the highest levels of window security.

    Aluminium windows

    Are windows with trickle vents available?

    Yes, they are and they can be a great way to safely ventilate your home. If your current windows are fitted with trickle vents, it’s also a legal requirement for any replacements to be equipped with them too. We stock two different types of window that are available with them:

    uPVC casements
    uPVC tilt & turn windows

    uPVC windows
    white casement window
    uPVC flush sash bow window with leaded glass

    Is privacy glass available?

    Yes, a range of decorative designs that also increase privacy levels is available with either double or triple glazed windows.

    What window furniture is there to choose from?

    This will vary from window to window. For instance, sash windows are available with run-thru sash horns, traditional sash lifts and locking cam catches. Whereas, Residence 9 windows have traditional peg stays, monkey-tail and pear drop handles for furniture options. A section on the specific furniture that is available for each window is present near the bottom of each of our window pages so you can get an idea of what we have to offer.

    Browse our range
    An open white uPVC tilt and turn windows


    What door sizes are available?

    Any door from T&K comes completely bespoke. Therefore, there are no standard sizes of door available. A member of our expert team will come out and perform a survey of your home, taking into account your specific requirements to work out the size of the door(s) that you need.

    Dark blue composite entrance door
    uPVC french door interior view

    What materials are used to construct doors?

    Doors from T&K are available in five different materials: uPVC, aluminium, timber, steel and composite doors. You can follow the highlighted links to learn more about each material. Although none is better than the other, each material has its own particular strengths. They also differ in appearance so you might find you’re more attracted to the one that suits your home’s unique styling.

    Why choose timber doors over uPVC?

    What types of door are available?

    Here at T&K, there are a number of different types of door to choose from to suit a variety of purposes. Select from:

    Entrance doors - available in uPVC, aluminium, timber and composite
    French doors – available in uPVC and timber
    Patio doors – available in uPVC, aluminium and timber
    Tilt & slide doors – available in timber
    Bifold doors – available in aluminium and timber

    Browse our range
    Internal Bifold Doors Northmapton
    Contemporary black composite front door

    Is Secured by Design accreditation available?

    Yes, a number of our door options are available with Secured by Design accreditation. To name one example, our composite doors are available with it. For a full list of door options that are available with this accreditation, feel free to get in touch with the T&K team. The specific security hardware that’s in use will vary depending on the type of door, although we always use advanced multi-point locking systems, securing the door to the frame in multiple positions. This makes it very difficult for a would-be intruder to find a weak area of the door that can be exploited to gain entry to your home.

    Get in touch

    What is the process for buying a door?

    After getting in touch with us and outlining the details of your proposed door, we’ll arrange a time to pay you a visit and work through the finer details, before providing you with a free no-obligation quote.

    Next, we’ll send one of our surveyors to take the exact specifications for the door(s). This ensures that the new door or doors will be the perfect fit your home.

    We then install the door(s) in a professional and courteous manner, keeping your home clean and tidy whilst minimising any disruption to your everyday life.

    Once the installation has been completed, every door is then guaranteed for 10 years and our customers are granted access to our devoted aftercare service.

    Grey timber patio doors interior view
    Yellow traditional composite door interior view

    What colours are doors available in?

    No matter what type of door or material you opt for, there’s a huge number of colour options available to suit your home. They range from the incredibly faint to the ultra-loud, encompassing every colour of the rainbow. On many of our doors, you can also opt for dual colours. This is where you have different colours for the internal and external part of the door, ensuring for a seamless match with every part of your home.

    Request a colour swatch

    What glass designs are there to choose from with doors?

    There is a huge number of glazing options that T&K’s range of doors can be equipped with. This includes privacy increasing options like Chantilly or Contora style glass. You can find an extensive list of designs in the glass options section on our contemporary composite doors page. Within the same section of our aluminium entrance doors page is some alternative choice of glass.

    Contemporary composite doors
    Traditional white composite door installation
    Grey aluminium bifold door leafs

    What opening options are available for doors?

    This will depend on the chosen door. For instance, bi-fold doors are folded to one side to open in a concertina style and sliding patio doors slide to the left or right. For most of our other doors, there’s the option for them to open inwards or outwards. We work with you, taking into account your needs to determine which opening option is the best for your home. However, entrance doors do not usually open outwards because this will involve placing the hinges outside your home, which is a potential security risk.

    Browse our range

    What furniture options are available with doors?

    The handle is one area of our doors that can be customised, regardless of the type of the door. Select from a variety of finishes for them too, like gold, chrome, black and white. Additionally, letterplates, spyholes, and safety chains are available. T&K can also fit a cat flap if you’re opting for a solid panel door.

    Cream uPVC french doors
    Black uPVC sliding patio door

    Are there threshold options to suit all access requirements?

    Yes, there is. T&K has four different threshold options to choose from, including an ultra-low option, which allows for wheelchair access if required.


    How long does it take to build a conservatory?

    There is no exact amount of time for how long it takes for a conservatory to be built. This is because every conservatory is bespoke and constructed to specific customer requirements. That being said, average size conservatories tend to take between three and four weeks whilst larger ones can take up to six weeks to build.

    uPVC Victorian conservatory with a Ultraroof tiled roof

    Does a conservatory need building regulations?

    Usually, conservatories are exempt from building regulations, however this is only if they meet the following criteria:
    • The conservatory is less than 30m2 in floor area and is built at ground level
    • It’s separated from the house by external quality walls, doors or windows
    • It has an independent heating system that has separate temperature and on/off controls
    • The glazing and any fixed electrics are compliant with the relevant building regulations

    Otherwise, conservatory building regulations must be met.

    How large can a conservatory be without planning permission?

    Conservatories or other single-storey extensions can be a maximum of 4 metres in height. However, if the conservatory is within 2 metres of a boundary, the maximum height allowed is 3 meters. The conservatory must also not cover more than 50% of the size of the existing house. For a full look at planning permission for conservatories, check out our guide using the link below.

    Read More
    White uPVC Victorian conservatory with a glass roof
    Edwardian tiled conservatory

    Do you need planning permission to put a tiled roof on a conservatory?

    Previously, a certain percentage of a conservatory’s roof had to be translucent in order be exempt from planning permission. This means that newly built tiled roof conservatories can usually be built without planning permission, provided they meet the correct criteria. However, when replacing the glass roof on an existing conservatory with a tiled one, Building Regulatory Approval will be required. Planning permission might also be required because this is classed as ‘change of use’. However, when hiring T&K for a conservatory roof replacement, we will take care of all of this for you. For further guidance, use the link below.

    Read More

    Can you add glazing to a solid roof conservatory?

    Yes, this is possible. Full length glazing panels and/or rooflights can be fitted into a solid roof. This means you needn’t sacrifice too much natural light when opting for a tiled roof, allowing you to illuminate specific areas of your conservatory also.

    uPVC Victorian conservatory with a glass roof Kettering
    White uPVC Victorian conservatory interior view

    What is the best conservatory roof?

    Which conservatory roof is right for you will depend on what you’re looking to get out of your conservatory. The three most common conservatory roofing types are glass, tiled and polycarbonate. To separate them in simple terms, glass leads the way in terms of illuminating your conservatory, tiled roofs provide the most insulation and polycarbonate roofs are the cheapest. We have a conservatory roof guide available for a more in-depth look at this issue.

    Conservatory Roof Guide

    Can conservatories be built over a drain?

    It is possible to build a conservatory over a drain. However, if the manhole is too close to the strip footing, the T&K team may have to move it somewhere else. Even if the drain is within the floor area of the conservatory, we’re able to raise and seal it, provided it’s at least 400mm away from the strip footing. Any drains will be securely sealed to prevent any odours from escaping.

    White uPVC Victorian conservatory installation
    Irish oak Edwardian conservatory

    How deep do conservatory foundations need to be?

    There is no exact amount for this, however foundations are usually between 650mm and 1000mm in depth. Foundation depth is affected by a number of variables, including the condition of the ground and the number of trees close by. Also, if any drains are nearby, the bottom of the foundations must be at least as deep as the floor level of the drain(s).

    Can conservatories be built on a slope?

    T&K Home Improvements is able to build a conservatory on ground that slopes. Once we’ve laid the foundations for the conservatory, we can add steps or a slope so you’re able to access it.

    White upvc conservatory

    How long will a conservatory last?

    Provided you take good care of the conservatory, it will easily be able to last decades. Plus, every conservatory installation from T&K comes with a 10 year insurance backed guarantee. This means that, in the unlikely event of a fault occurring with your conservatory during this 10-year period, we’ll come out and rectify any issues free of charge.

    Can I upgrade my existing conservatory?

    If you’re fed up with your current conservatory for whatever reason, we can either build you a new one or upgrade your existing one. We offer a conservatory refurbishment service, which covers everything from new windows and doors for your conservatory, to new frames or a replacement roof. Please feel free to contact us to discuss any issues you have with your current conservatory and we will see what we can do to help.

    uPVC Lean To conservatory interior view

    Can existing conservatories be moved?

    Existing conservatories can be taken down and moved to another location. However, any warranties and guarantees will be voided in the process, plus its structural integrity might be compromised. If you’ve recently moved to a new home and are considering a new conservatory, get in touch and see if we can help.

    Get in touch

    Can conservatories be built without foundations?

    Building conservatories without foundations is possible, however it is not best practice. Sturdy foundations are essential for ensuring the structural integrity of the conservatory will last. Under the right circumstances, we can overcome the need for foundations by using a Durabase. But due to the uniqueness of every conservatory installation, we recommend having one of our designers take a look first.

    Lean To conservatory with a Ultraroof tiled roof
    solid roof conservatory

    Can you build conservatories without walls?

    Instead of walls or a dwarf wall, which is a short brick wall, T&K can build full-length glazing panels instead. However, this will limit the amount of radiators and power outlets that we can fit because these types of things are unable to be fitted to glazing panels.

    Can I build a conservatory on a bungalow?

    In short, the answer for this is yes. There are numerous conservatory options that are suitable for bungalows, including Victorian and Lean-to conservatories. Our definitive guide on conservatories for bungalow contains all the information you’ll require when considering a bungalow conservatory.

    Bungalow Conservatories Guide
    Rosewood uPVC P Shaped conservatory

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    Serving homeowners across Northamptonshire

    During our tenure as traders, we’ve provided bespoke home improvement solutions across the Northamptonshire area and beyond. This includes areas in counties like Oxfordshire and Buckinghamshire. We've installed home improvements in places such as Corby, Northampton, Bedford, Kettering, Milton Keynes, Cambridge, Aylesbury, Oxford, Rugby, Bicester, Luton, Market Harborough & Banbury.

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