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Can You Put a Skylight on a Flat Roof?

Skylights are a great way to brighten up your home with natural light. You can install skylights on flat roofs, but there are a few things to consider before ordering one.

Firstly, check with your local planning authority that your plans meet local regulatory standards.

Once your plans are confirmed as compliant, you’re good to go. Then, it’s time to consider products and processes. Types and features of flat roof windows, placement and installation are all things to keep in mind before deciding on which skylight to put on your flat roof.


What Are the Benefits of a Skylight for a Flat Roof?

Installing a skylight on your flat roof offers many benefits, improving the functionality and aesthetic appeal of your home:


Increased Natural Light

A skylight invites natural light, brightening your interior more effectively than standard windows. This reduces your reliance on artificial lighting during the day and creates a warm, welcoming environment.


Improved Ventilation

Some skylights have ventilation features, and others can open, providing an effective method of ventilating your space. This allows fresh air to circulate and reduces humidity throughout your room, especially in kitchens and bathrooms.


Energy Efficiency

Skylights can contribute to reducing your energy consumption. By maximising the use of natural light, you'll need less artificial lighting, which can lead to lower electricity bills. Proper installation and energy-efficient glazing help to maintain your home's temperature, further reducing heating and cooling costs.


Improved Aesthetics

Skylights boost the aesthetic appeal of your home, both internally and externally. Internally, they add a design element that can make your rooms feel larger and more open. Externally, skylights can increase the architectural appeal of your property, which can boost its market value.


Emotional Wellbeing

Exposure to natural light has been shown to have numerous health benefits, including improving mood, improving sleep quality, and even boosting productivity. By incorporating a skylight into your flat roof, you're creating an environment that supports your day-to-day wellbeing.

These benefits can help you to make an informed decision about adding a skylight to your flat roof, ensuring it matches your home improvement requirements.


What Are the Best Types of Skylights for Flat Roofs?

There are a variety of styles of flat roof windows, that can be used to improve your home in different ways:


Flat Glass Rooflights

These are sleek, contemporary rooflights that sit flush with your roofline, suitable for any pitch, and offer a clean, modern aesthetic while flooding your space with light.


Roof Lanterns

Roof lanterns are one of the most popular skylights. Extending above the roofline, they provide a multi-dimensional light source that can dramatically transform any room.


Modular Rooflights

Perfect for larger spaces, modular rooflights can fit any pitch and be interlinked, allowing you to create expansive windows for maximum daylight.


Circular Rooflights

For a distinctive but minimalist look, circular rooflights are a great choice, suitable for all pitches, and bring a unique character to your flat roof while inviting ample natural light.


Considerations for Choosing a Flat Roof Skylight

Selecting the right skylight for your flat roof is crucial, as it impacts not just the aesthetics but also the functionality of your living space. Here are key considerations to guide your choice:


Think of Position & Size

Think about where you want to place the skylight and how big it should be. The position will affect how much light enters the room and at what time of day, while the size will influence the illumination and temperature levels.


Consider Ventilation & Operability

Decide whether you want a fixed skylight or one that opens for extra ventilation. Ventilated skylights can help reduce condensation and improve air quality, especially in areas like kitchens and bathrooms. If you opt for an operable model, consider whether you prefer manual or electric opening, based on accessibility and convenience. 


Explore Different Types of Skylight

Choose between flat glass rooflights, roof lanterns, modular rooflights, and circular rooflights, each offering different aesthetic and lighting benefits. Consider which type aligns with your architectural style and lighting needs.


Have an Idea of Budget

Skylights vary in price, so it's important to set a budget that includes not only the cost of the skylight itself but also installation and any potential future maintenance.


Other Important Considerations

Think about the skylight's glazing options for energy efficiency, UV protection and noise reduction. Also, consider the local climate and weather patterns, as these will influence the best type of skylight for your home.


How Much Does a Flat Skylight Cost?

The cost of installing a flat roof skylight in the UK varies, depending on type, features, size, and installation complexity. Basic flat glass rooflights are typically more affordable, while advanced options like roof lanterns or modular designs may cost more. Features like operability and finish can also affect the price. For a clear understanding of expenses, consider all these factors and obtain specific quotes based on your requirements.


Flat Glass Rooflights

£X - X

Modular Rooflights

£X - X

Roof Lanterns

£X - X

Circular Rooflights

£X - X



How to Install a Skylight on a Flat Roof

Installing your own skylight might seem like a daunting task, and while it can be done by professionals, Daylight Systems offers rooflights specifically designed for easy installation, meaning you can self-install if you prefer a DIY approach.

For a professional installation, the process typically involves assessing the roof structure to ensure it can support the skylight, cutting an opening to the correct dimensions, and then fitting the skylight unit securely to prevent any leaks. The skylight must be sealed properly and integrated with the roof's waterproofing system, ensuring a watertight finish.

Whether you choose to hire a professional or install the skylight yourself, ensuring correct fitting and sealing is crucial for the longevity and performance of your new flat roof skylight.

Installation video guides can be found here.


Key Takeaways

Here are the main points to keep in mind:


  • You can install a skylight on most flat roofs providing they are structurally sound.


  • Check with your local building authority to ensure your plans are compliant with building regulations.


  • There are multiple options to consider, from type and style, to features and functions. Familiarise yourself with these and how each could benefit your space.


  • Installation is a straightforward process, but professional installation is recommended for those with little DIY experience.


Frequently Asked Questions

Can you put skylights in a flat ceiling?

Yes, you can install skylights in a flat ceiling. They are specifically designed to be integrated into flat roofs, allowing natural light to enter the space beneath and providing ventilation to the room.

What kind of skylight do I need for a flat roof?

For a flat roof, you'll need a skylight designed to prevent water pooling and ensure proper drainage. All of our skylights meet this criteria. These are made watertight and durable, suitable for flat or low-pitched roofs.

Do you need planning permission to install a skylight on a flat roof?

In most cases, you don't need planning permission to install a skylight on a flat roof, as it's often considered permitted development. However, it's important to check with your local planning authority, especially in conservation areas or for listed buildings.

What is the minimum pitch for a flat roof skylight?

The minimum pitch for a flat roof skylight is typically between 0 and 15 degrees. This slight pitch ensures adequate water runoff and prevents water from pooling around the skylight, which could lead to leaks or damage over time.

How much does a flat roof skylight cost in the UK?

The cost of a flat roof skylight in the UK varies, typically ranging from £500 to several thousand pounds, depending on the type, size, features, and installation complexity. It's essential to factor in both the unit price and installation costs when budgeting for your skylight.


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