Flat Roof Windows | Korniche

FAQS

• Can you put windows on a flat roof?

  Absolutely! Flat roof windows are a fantastic way to bring natural light into your space. They’re designed specifically for flat roofs, which means they are heat soak tested for maximum strength and durability.

  Flat roof windows are also incredibly versatile. Whether your roof is completely flat or pitched, the Rooflight Centre will have the right window for you. We offer a wide range of sizes and the popular option for low-maintenance glass.

  Get in touch today to find out more.

• What are the benefits of flat roof windows?

  There are lots of great reasons to install a flat roof window in your home:

  • Natural light: flat roof windows let in more natural sunlight than vertical windows
  • Reduced energy costs: increasing the amount of natural light in your home reduces your reliance on artificial lighting.
  • Modern aesthetic: flat roof windows add a contemporary touch to your home’s design.
  • Personalised design: the range of sizes and designs available mean you can give your space a bespoke look and feel.
  • Increased property value: if and when you plan to move, flat roof windows improve your property’s value and appeal.
  • Health benefits: sunlight is essential for the body to produce vitamin D, which plays a crucial role in bone health, immune function, and mental well-being.
• How do I choose the right flat roof window?

  When choosing your flat roof window, consider the following:

  Glass type
  Our flat roof windows are available in a range of solar, self cleaning glass options in either toughened or laminated glass.

  Frame material
  Aluminium is a popular choice for its durability and weather resistance. Our flat roof windows feature aluminium that is thermally broken. Essentially, this means that materials like polyamide plastic or fabric are used to bridge the gap between the inner and outer frames of the flat skylight and act as a form of insulation. Polyamide plastic is highly temperature-resistant, so it is great for this purpose.

  Curbs
  Window curbs prevent the flat skylight from coming into direct contact with the surface of the roof and ensure that the window is fully weather-proofed. Curbs are usually made from stainless steel or aluminium – two materials renowned for their durability and corrosion resistance. Curbs are not essential when installing a flat roof window, but can be needed in order to meet building regulations. Learn more about window curbs and how to accurately measure them here.

• How do I clean my flat roof windows?

  Cleaning flat roof windows is simple – all you need is warm soapy water and a cloth. You might be tempted to use a jet washer, but it’s not recommended – you run the risk of damaging the silicone seal surrounding the panes and compromising the waterproof qualities of the window.

  Alternatively, you could choose to install self-cleaning glass, which is low maintenance and a fantastic solution for hard-to-reach flat roof windows. You can read more about self-cleaning glass below or get in touch to discover how it can work for you and your home.

• What is "self cleaning" glass?

  Self-cleaning glass offers a unique blend of self-cleaning and solar control properties. So it’s no surprise it’s an incredibly popular choice for homeowners seeking cutting-edge glass solutions.

  The glass is coated with a special titanium dioxide layer that reacts with sunlight to break down dirt and grime. When it rains, water spreads evenly across the surface, lifting and washing away the loosened dirt.

  This means less cleaning for you and a cleaner, more attractive surface.

• Can you walk on flat roof windows?

  You can walk on flat roof windows – but only those that have been made with glass designed for this purpose.

  All of the glass used in our flat roof windows is strong and durable, but they aren’t all made to withstand the weight of a person. If you’d like to install a window that is safe to walk on, you will need to use toughened laminated glass, a type of glass that endures a destructive heat test to ensure that the glass isn’t liable to shatter when put under pressure.

  Find out more about flat roof windows and whether they are walkable in this handy guide.

• How long do flat roof windows last?

  With proper maintenance, a flat roof window can endure 15-20 years of use, depending on the type of higher glazing you choose. In other words, the type of glass you choose to install and the type of sealant used to surround the panes. Things to consider when choosing double or triple glazing include:

  • Durability: Triple glazing is more durable and can withstand harsh weather and strong winds.
  • Insulation: The extra pane of glass provides better insulation and reduces heat transfer.
  • Energy efficiency: Triple glazing can increase heat conservation by about 20% compared to double glazing.
  • Noise reduction: The thickness of triple glazing can deflect sound waves.
  • Lifespan: Triple glazing typically lasts longer than double glazing.

  Find out more in our guide to triple glazing.

• Do I need to consider ventilation for my flat roof windows?

  Generally, no – you don’t need to consider ventilation when it comes to roof glazing as it’s generally taken care of through windows, doors and air bricks.

  But if ventilation is required, or simply your preference, then a roof lantern is the best option. Check out our wide range of manual and remote-operated roof lanterns here.

  Our flat roof windows are fixed and cannot be opened.

• Do I need planning permission to install flat roof windows/skylights?

  Typically, you won’t need planning permission to install a flat roof window. However, there are specific guidelines to follow:

  • Height restrictions: The new structure shouldn’t protrude more than 150mm above your existing roof and must be lower than the highest point of your roof.
  • Window specifications: Any side-facing windows should have obscured glass, and any openings must be at least 1.7 metres above the floor.

  Please note that these guidelines apply to houses. For flats, maisonettes, or converted houses, the rules might differ.

  To ensure compliance, it’s always best to check with your local planning authority, especially if you live in a conservation area or a listed building.

• How much do flat roof windows cost?

  Our flat roof windows start from just £356.80 (excluding VAT). That’s a fantastic price for a high-quality product that you won’t find cheaper elsewhere.

  We offer a 10-year guarantee on all our flat roof windows and skylights, which are available in a wide range of sizes and configurations – in fact, too many to feature on our website. But rest assured, we can accommodate every option to suit your specific needs. Whether you need a standard size or a bespoke solution, we’ve got you covered.

  Don’t see the size you need? No problem. Contact us for a tailored quote.