Bifold Doors


“Seamless order process from start to finish and one of the few Companies that offer genuine customer service these days. I would highly recommend anybody wanting a top quality door at a very fair price to use these guys.“

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Frequently Asked Questions

  • Do I need planning permission for roof lanterns or flat roof lights?

    Adding or replacing doors don’t usually require planning permission. This type of home improvement is normally considered a ‘permitted development’.

    There are, however, restrictions for roof lanterns or flat roof lights when making alterations to houses.

    • A roof lantern must not project any higher than 150mm from the existing roof plane.
    • A roof lantern must not be higher than the highest part of the house roof.
    • Side facing windows must have obscure glazing and any openings must be 1.7m above the floor.

    However, if you live in a listed building, or conservation area, you will normally need to apply for planning permission to install bifold doors, roof lanterns or flat roof lights.

  • What are the pros and cons of flat roof lights?


    • A roof light will let natural light enter your home and natural light is, of course, free.
    • It can make your space look larger, even with moonlight at nighttime.
    • A roof light can improve your property’s value.
    • A roof light can provide heating and provide ventilation, which can cut down on your energy costs quite significantly.


    • Roof lights placed in shady areas or angles can let in too much light or provide much heat than needed.
    • An installation on the south side of a building can provide solar heat in winter but may produce too much heat in the summer.
    • Roof light may be difficult to reach when cleaning.
  • Why should I choose a roof lantern?

    Roof lanterns certainly have the wow factor and offer an elegant choice.

    They are mainly used on flat roofs and work especially well in larger open-plan spaces where natural light from your doors and windows has further to reach.

    Your energy bills are reduced without the need for lighting your rooms with electricity. Roof lanterns can help keep your home warmer for longer, so you’ll soon benefit from improved thermal efficiency with high-performance glazing.

    A roof lantern will make a room look bigger, providing additional room height to alter the space of the room.

    But not only that, by having roof lanterns installed, you can complement your interior and exterior décor.

  • How do I clean a roof lantern?

    The Korniche roof lantern is fitted with clear self-cleaning 1.2 U-Value Glazing.

    But, how does self cleaning glass work? The glass that we use on our roof lanterns use technologies to ensure that you don’t have to clean the glass constantly. The outer face of the glass is manufactured with an invisible dual-action coating. This coating creates a chemical reaction that breaks down organic dirt and grime on the surface of the window by preventing anything from sticking to the glass.

We are here to help, call us today on 020 3005 1584 for friendly, professional advice

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