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Want to browse more of our beautiful range of aluminium doors and windows? You can view our luxurious selection of front doors, sliding doors, bifolding doors and windows by simply entering your email address below, where you can then download a brochure of choice.

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    Why Klosen for Doors and Windows?

    Klosens mission is to provide an outstanding customer experience, backed with a premium quality of products.

    Our customers choose us because they recognise our individuality, admire our designs, attention to detail and the service we deliver. From our contemporary factory and showroom in Market Deeping our team of skilled craftsmen manufacture bespoke products specific to the individual needs of our clients.

    Great Price & Quick Delivery

    This company have been amazing and came to our rescue when another company let us down repeatedly over a period of 4 months during our building work. We got a great price, a quick delivery time and the same product but this time with lovely fitters who knew exactly what they were doing. Now we will will have a warm house for christmas HOORAY !! We went for 3 large sliding doors and the quality of the product is excellent . Many thanks to Audrey Cieran and the team I would recommend highly
    - Esther Young


    Delighted with the product and the service provided by Klosen. The installation team were excellent and very helpful.
    - Sara Hyem

    Very Happy

    We’ve been very happy with the work Klosen recently completed for us. They installed a variety of windows and sliding doors for us on our new build project. All of the information we requested early on was provided promptly and they were great with our architect. Very happy with the end result and the colour they helped us chose.
    - Sarah Munton