Learn the key differences between rooflights and skylights, and discover which option best suits your home or building project.
Bringing natural light into a space can transform a home or commercial property, enhancing both aesthetics and energy efficiency. Two of the most popular solutions for daylighting from above are rooflights and skylights. Although the terms are often used interchangeably, they refer to slightly different products with distinct features and applications.
Understanding the differences between rooflights and skylights can help you make the best decision for your space, whether you’re undertaking a loft conversion, a kitchen extension, or a new build. In this guide, we’ll explore how these glazing options compare, what each is best suited for, and the key considerations when choosing between them. We’ll also point you to a trusted source to explore a wide range of rooflights and skylights suited to both residential and commercial settings.
What Are Rooflights?
A rooflight is a glazed unit installed in a flat roof or at a low pitch (typically below 15 degrees). It is designed to sit on or within the structure of the roof, often using an upstand or kerb to create a weather-tight fit.
Rooflights are primarily used in flat roof applications and can be fixed (non-opening) or opening for ventilation. They are popular in modern extensions, single-storey spaces, and commercial buildings, thanks to their minimalist appearance and excellent light transmission.
Typical features of rooflights:
- Designed for flat or low-pitch roofs
- Installed using an upstand/kerb
- Often larger in size than traditional skylights
- Available in various styles, including walk-on and lantern rooflights
- Can be fixed or operable
What Are Skylights?
Skylights are typically associated with pitched roofs and are integrated directly between roof rafters, sitting flush with or slightly proud of the roof surface. They are most often seen in loft conversions, attic spaces, and pitched-roof bathrooms or stairwells.
Many skylights are operable, offering both ventilation and light. They can be manually or electrically operated and are often supplied with integrated blinds or solar controls.
Typical features of skylights:
- Designed for pitched roofs
- Fitted between rafters (frameless or framed)
- Generally smaller than flat roof rooflights
- Common in domestic conversions and attic rooms
- Available in top-hung or centre-pivot opening designs
Key Differences Between Rooflights and Skylights
While both serve the same core purpose, bringing natural light into a space, there are technical and aesthetic differences that set them apart.
Feature Rooflight Skylight
Roof Compatibility Flat or low-pitched roofs Pitched roofs
Installation On an upstand/kerb Between roof rafters
Common Settings Extensions, flat-roof rooms, Lofts, attic rooms, sloping roof spaces
commercial buildings
Aesthetics Modern, clean-lined, frameless look Integrated, often with visible frames
Ventilation Options Fixed or opening (manual/electric) Often top-hung or centre-pivot opening
Customisation Wide range of sizes, Standardised dimensions, fewer custom shapes
shapes and finishes
When to Choose a Rooflight
If your property has a flat or nearly flat roof, a rooflight is the most appropriate solution. It provides the best weather protection in low-pitch settings and can dramatically increase the amount of daylight in single-storey spaces or rooms that lack vertical windows.
Rooflights are also commonly used in commercial properties, including offices and retail spaces, to reduce reliance on artificial lighting and create a more open atmosphere.
Popular rooflight styles include:
- Flat fixed rooflights – clean, modern and maintenance-free
- Opening rooflights – for natural ventilation as well as light
- Walk-on rooflights – suitable for terraces and roof gardens
- Lantern rooflights – ideal for feature lighting in kitchen or dining extensions
To explore these options, you can browse a comprehensive selection on the Rooflight Centre website, which offers high-quality solutions for both homes and commercial projects.
When to Choose a Skylight
Skylights are best suited to pitched roof settings. If you’re converting a loft or renovating an attic room, a skylight provides an efficient and aesthetically pleasing way to introduce light and fresh air. They are designed to integrate directly into the roofline, creating a seamless finish.
Because they are often installed in living spaces like bedrooms or stairwells, many skylight models come with blinds, solar control glazing, and insulation-enhancing features to improve energy performance.
Some of the most common uses include:
- Loft conversions – where headroom is limited and vertical windows aren’t viable
- Bathrooms or en-suites – where privacy is important
- Landing areas or staircases – to introduce natural light into dark spots
- Living spaces with pitched roofs – for a brighter, more open feel
Considerations Before Making a Choice
- Roof Pitch
Your roof’s angle is one of the primary factors. A flat or low-pitch roof almost always calls for a rooflight. If your roof is pitched at 15 degrees or more, a skylight is likely the better fit. - Purpose of the Room
Think about how the room is used. A flat roof extension used as a kitchen might benefit from a large rooflight or lantern, while a loft bedroom would suit a skylight that opens for ventilation. - Planning and Building Regulations
In many cases, adding rooflights or skylights doesn’t require planning permission, especially if they don’t protrude more than 150mm from the roof surface. However, always consult with your local authority or architect. - Glazing Options
Both rooflights and skylights come with glazing options that impact performance—like low-E coatings, laminated glass, or solar control tints. Choose depending on your priorities: heat control, privacy, noise reduction, or insulation. - Ventilation Needs
Do you want the unit to open? Some rooflights come with manual or electric opening mechanisms, while others are fixed for maximum thermal efficiency. Skylights are typically easier to open for airflow in habitable spaces.
Rooflights vs. Skylights: What’s the Right Choice for Your Space?
Rooflights and skylights are both excellent ways to increase natural light and improve the feel of your space, but the right choice depends on your roof structure, room function, and aesthetic preferences. While the differences might seem subtle, choosing the appropriate glazing solution ensures longevity, energy efficiency, and comfort in your home or business.
Whether you’re planning a sleek modern extension or breathing new life into a loft space, understanding these differences helps you make a more informed decision.
If you’re ready to explore your options further, the Rooflight Centre offers a broad range of carefully selected products suitable for a wide variety of building types and budgets. With expert guidance and high-spec designs, you’re bound to find a solution that brings your space to life naturally.
