Welcome to the DGN

The Double Glazing Network consists of monitored and vetted suppliers and installers of the highest quality uPVC windows, doors and conservatories. So if you are looking for a trustworthy installer, you can be sure of getting high-quality products fitted to the highest standards, whichever DGN member you use.

Simply by entering your postcode, our site will offer you a selection of local installers who supply energy efficient, secure, environmentally friendly windows and doors.

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Our Charter

The local Double Glazing Network Dealer agrees to conform to the standards and requirements of the Dealership Charter which are set out below:

  1. The local Double Glazing Network Dealer shall represent the products and services of Liniar in good faith and in a professional manner.
  2. The local Double Glazing Network Dealer shall at no time misrepresent Liniar products and services to any third party.
  3. The local Double Glazing Network Dealer shall engage in selling practices that are honest and ethical.
  4. The local Double Glazing Network Dealer shall implement good customer service.
  5. The local Double Glazing Network Dealer must provide each of the following within a reasonable time period: Initial contact with customer, customer appointment, technical survey and installation.
  6. The local Double Glazing Network Dealer will take responsibility for all Building Regulations and planning permissions that may be required.
  7. The local Double Glazing Network Dealer will take responsibility to register all installations where required with your local authority.
  8. The local Double Glazing Network Dealer will issue your warranty upon completion of your installation.
  9. The local Double Glazing Network Dealer will provide you with your Window Energy Rating Certificate upon completion of your installation.

Frequently Asked Questions

  • Who are the Double Glazing Network?

    The DGN is an impartial website, created by TruFrame Trade Frames Ltd (the UK’s largest fabricator of Liniar windows and doors in the UK) with the aim to provide homeowners with peace of mind when choosing a trusted, local installer to fit our products into your home. We run this as a free service as we know it can be difficult to find a trusted installer to fit uPVC windows, doors and conservatories.

  • Are your reviews paid for?

    No, absolutely not. We are an impartial website that wants to deliver great installers to great homeowners. All of the reviews that are listed on the website are taken directly from Google Reviews and are not filtered.

    All testimonials listed on the DGN website are from genuine homeowners that have provided feedback to the service provided.

  • Why should I choose the Double Glazing Network?

    We are in a unique position to connect you to double glazing installers in your area who are approved to install market-leading products. Our network of double glazing installers across the UK have been trained and assessed to ensure that they provide window and door installations of the highest standard. If you choose us to find your double glazing installer, you are opting for outstanding products, installation and customer service.

    Our Connections
    We provide a simple and efficient search function to help you find your double glazing installer. Simply by entering your postcode, you will be connected to a variety of local installers who fit exceptional quality windows and doors. Each of our installer pages contains all the information you require in a clear layout, making it easy to search through. Whether you are looking for a conservatory, double glazed windows or doors, we will find an installer for you.

    Trustworthy Reviews
    The company pages on our site contain a selection of the latest reviews by customers. This ensures that you can see which installers live up to their expectations so that you can be confident in their superior installation services.

    Energy Efficiency
    Every installer on our network offers high quality, energy efficient double-glazing. The benefit of energy efficiency is that because the warm air is retained, your home will stay warmer for longer. Ultimately, this means that you can spend less money on heating, lowering your energy bills.

    Supreme Security
    From the well renowned Yale locking mechanisms to patented Modlock locking systems, the double-glazed products that our installers fit offer fantastic security. So, you can be confident that your home is thoroughly protected against intruders.

    Environmentally Friendly
    The double glazing products that our installers fit are completely lead-free and in most cases, 100% recyclable too. Where products are not 100% recyclable they are designed to be simple to strip down so that individual parts can be recycled or reused.

    Our British supply chain sees Liniar design and manufacture all their products from a corporate headquarters located in Denby, Derbyshire. This advanced, purpose-built facility houses the largest uPVC extrusion mixing plant in all of Europe.

    Guaranteed Products
    Every product on the double-glazing network comes with a ten-year guarantee. This enables you to feel completely secure in the knowledge that the products your installer fits are of the highest quality. It is also important that in the unlikely event of any problems, you can go directly to your installer, which will save you time and money.

  • Who are your supply chain partners?

    At the heart of the Double Glazing Network is TruFrame, one of the window industry’s best-kept secrets. TruFrame have been supplying double glazing products for over 20 successful years, so you can be confident in our supply chain and Network members.

    TruFrame only partner with suppliers that they can trust which is why they only use the Liniar profile system due to its superb energy efficiency and for security they utilise products from leading household names such as Yale and ATK.

  • What makes the Liniar profile so special?

    The Liniar profile is the most technically advanced uPVC window profile system money can buy.

    Revolutionary six size-optimised chambers break up mini convection currents keeping warm air locked in.

    Superior Gaskets
    High performance (patented) double-action ‘bubble’ gaskets maintain consistently tight weather-seals.

    Positive Drainage
    Specially designed profile contours maximise natural drainage and prevent moisture build-up.

    Integrated Reinforcing
    Internal structures provide exceptional stiffness and rigidity whilst minimising the need for steel.

    Flipper Gasket
    Unique ‘glazing flipper ‘provides an additional seal to reduce cold transfer, water ingress and noise pollution.

  • Why are your products better for the environment?

    100% Lead-Free
    Our windows are 100% lead free. The dangers of lead are well known and the Double Glazing Network is extremely proud to supply one of the few window systems to offer an entirely lead free range of products (ahead of UK and EU legislation).

    Commitment to Recycling
    Our uPVC windows are extremely robust and do not need expensive steel reinforcement. They are therefore 100% recyclable making them a truly environmentally friendly product.

    Reduce your Carbon Footprint
    Having uPVC windows installed throughout your property will reduce the amount of energy you use and can lower your CO2 emissions by approximately 2/3 of a tonne (680kg) each year.

  • How are your windows and doors energy efficient?

    Gain Free Solar Heat
    Our energy efficient windows have a dual functionality that allows you to gain free solar energy from our greatest natural resource; the sun.

    The tight weatherseals of the windows prevent cold wind and rain from entering your property whilst the glass allows natural free energy from the sun to enter and heat your home.

    The glass of the windows has a transparent metallic coating that reflects heat back inside, retaining warmth and reducing the amount of energy needed to heat your home. Put simply, saving energy can save you money!

    Cheaper Heating Bills
    Our windows are capable of achieving an A+14 energy rating. This means your windows would retain an additional 12 kWh per m² each year over a standard A+0 rated window.

    Compared with C rated windows you would save enough energy per year to run a full size A++ fridge freezer constantly and do a 2kg load of washing every other day for a year!

    (Based on a property with 10 windows, each 1m². All assumptions provided by information available from www.carbonfootprint.com and www.energysavingtrust.org.uk).

    British Fenestration Rating Council (BFRC)
    In 2004 Window Energy Ratings (WER) were introduced by the BFRC (British Fenestration Rating Council) in order to simplify the method of comparing the energy efficiency of windows.

    The energy rating of the window, described as a letter from A (best) to G (worst), is determined by the amount of energy the product will either lose or supply to the property over the course of a year. The BFRC runs the Window Energy Ratings (WER) scheme. We are proud to say that our energy efficient uPVC windows are all BFRC approved.

    The WER system uses a rainbow coloured scale to show the energy efficiency a window provides. Our windows are capable of achieving an A+14 rating, the highest level of energy efficiency

  • Do you have further information on product guarantees?

    Yes, you can feel secure with a 10 year manufacturer’s guarantee covering all Liniar products.

    Liniar 10 Year Product Guarantee
    Liniar products are manufactured using revolutionary technology from approved suppliers and are guaranteed not to warp, split or discolour for 10 years from the date of installation.

    This guarantee is issued in association with our raw material suppliers and based on proven technology for UV stabilised products.

    10 Year Yale Mechanical Guarantee
    All Liniar windows come supplied and fitted with the Yale Shootbolt locking system as standard. All Liniar doors also come supplied and fitted with Yale high-security locks as standard.

    Also, every Yale Shootbolt window locking system is guaranteed against mechanical failure for 10 years after installation. You will also receive up to £1,000 towards home content insurance in the unlikely event of a break in.

    Are you accredited?
    Yes. The Double Glazing Network is committed to providing consumers with the very best quality uPVC double glazing. In order to achieve this, we have devoted time, effort and expense in obtaining all of the standards and accreditations the industry has to offer.

    British Fenestration Rating Council (BFRC)
    All products supplied by members of the Double Glazing Network are 100% British made by a BFRC approved manufacturer and licence holder. The Liniar window system is capable of achieving a WER (Window Energy Rating) of A+14 using a double glazed sealed unit. We are not aware of another window profile system that can match this extraordinary level of energy efficiency.

    Operating in Accordance with the British Standards Institution (BSI)
    Founded in 1901, the BSI group is a non-profit distributing company which helps organisations improve their quality and performance as well as helping them become more sustainable. The BSI provides independent third-party certification of management systems, best practice standards and product testing. Liniar products are continually audited by the BSI to ensure compliance with important British, European and International Standards.

    Secured by Design
    The ‘Secured by Design’ Licence is the official Police security initiative backed by the Home Office Crime Reduction Unit ensuring high-security standards for quality crime prevention products. We are proud to state that the Liniar product range has successfully achieved Secured by Design status.

    Kitemark Accreditations
    The Kitemark is a registered certification mark which is owned and awarded by the BSI. The Kitemark symbol is globally recognised as a symbol of trust, integrity and quality. When you see the Kitemark symbol you can be assured that vital safety and performance requirements have been met which is why Liniar uPVC double glazing products provide a visible confirmation of quality. The Liniar range of products holds Kitemark licences 587164, 587165 and 587166.

  • Do you capture data on me?

    The DGN only capture data that you supply to installers and we do not pass on, sell or distribute your data to any other 3rd parties.

    The company pages on our site contain a selection of the latest reviews by customers. This ensures that you can see which installers live up to their expectations so that you can be confident in their superior installation services.

  • I have a question about the DGN. How do I contact you?

    To contact us directly, use our contact form. We’d love to hear from you!

Need some more help?

If you didn’t find what you needed and need to contact us directly, then please fill out our contact form and a representative will contact you in due course.

Contact Us
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Head Office

Units 3KLM Hudson Road,
Saxby Road Industrial Estate,
Melton Mowbray,
LE13 1BS