A ceiling window can transform a space with natural light, but the terminology around it can be confusing.
Names like rooflight, roof window, and skylight are often used interchangeably, but they don’t all mean quite the same thing.
If you’re not sure what a window in a roof is actually called, we’ve explained the differences between the most common terms to help you understand the main types of roof windows in UK homes.
WHAT IS A CEILING WINDOW CALLED?
A ceiling window is a general term for any glazed window installed above your head, typically in or on a roof.
While people might use the term in everyday conversation, there isn’t one fixed technical name for all ceiling windows.
The ceiling window name varies depending on the roof type and how the window is installed. If it’s built flush into a pitched roof, it’s usually called a roof window. If it’s positioned on a flat roof or sits above the surface of a pitched roof using a kerb, it’s called a rooflight.
ROOFLIGHTS, ROOF WINDOWS, AND SKYLIGHTS: WHAT’S THE DIFFERENCE?
If you’ve ever asked what a roof window is called or felt confused by terms like rooflight and skylight, you’re not alone.
Let’s break down the differences.
ROOFLIGHTS
Rooflights are glazed units typically installed on flat roofs and raised above the surface using a kerb or upstand. The elevation allows water to run off and ensures a secure fit. Rooflights can also be fitted on pitched roofs, but in those cases, they sit out of plane with the tiles rather than flush.
ROOF WINDOWS
Roof windows are installed flush within a pitched roof. They are integrated with the structure and usually sit between roof tiles. These windows in a roof typically open, making them ideal for loft conversions or attic spaces where light and ventilation are needed. They follow specific design standards and often include features like opening mechanisms, blinds, and thermal performance glazing.
SKYLIGHTS
Skylight is a broad, informal term, often used to describe any kind of ceiling window, regardless of installation method. In the UK, the term has no strict technical meaning. It might refer to a bespoke unit on a pitched roof, a fixed window on a flat roof, or simply be a general label used when the precise type isn’t known.
TYPES OF CEILING WINDOWS
Once you understand the terminology, the next step is knowing which types of roof windows or rooflight might suit your space. Here are some of the most common styles:
CENTRE-PIVOT ROOF WINDOWS
Centre-pivot roof windows are hinged in the middle and rotate inward. They’re practical, easy to clean, and a popular choice in lofts where space is limited. The sash pivots to allow ventilation without taking up much room inside.
TOP-HUNG ROOF WINDOWS
These types of roof windows open outward from the top, giving you an unobstructed view of the sky. Top-hung roof windows work well where you want more headroom or a clearer line of sight, and they’re ideal for loft conversions where windows sit lower on the wall.
FIXED ROOF WINDOWS
Fixed roof windows do not open. They’re designed purely to let in natural light and are often installed in stairwells, hallways, or other areas that don’t require airflow.
Fixed skylights are a similar concept, typically used to describe non-opening glazed units on pitched or flat roofs that provide daylight without ventilation. While the term “skylight” is broader, it’s often used informally to describe this type of fixed overhead glazing.
FLAT ROOF WINDOWS
Flat roof windows are designed for flat or very low-pitch roofs. This type of roof window sits on a kerb and may be either fixed or opening. Some are manually operated, while others include electric opening systems and rain sensors. Flat roof windows are commonly used in ground-floor extensions, internal bathrooms, and contemporary kitchens.
ROOF LANTERNS
Roof lanterns are decorative glazed structures made up of multiple panes arranged in a pitched or pyramid shape. They sit above a flat roof, bringing in light from several angles. Roof lanterns are often used in open-plan living spaces and create a striking architectural feature.
FAQs
WHAT IS THE DIFFERENCE BETWEEN A ROOFLIGHT AND A ROOF WINDOW?
A rooflight is usually installed on a flat roof and raised above the surface using a kerb. A roof window is fitted flush into a pitched roof. Both of these types of windows in a roof allow natural light in, but they differ in design and application.
CAN A CEILING WINDOW OPEN?
Yes. Many roof windows and rooflights are available in opening versions. Some are operated manually, while others use electric controls.
IS A SKYLIGHT THE SAME AS A ROOFLIGHT?
Not exactly. Skylight is a general term and can refer to various overhead windows. A rooflight is more specific and usually refers to a glazed unit installed on a flat roof, often raised on a kerb.
DO YOU NEED PLANNING PERMISSION FOR A CEILING WINDOW?
Most rooflights and roof windows fall under permitted development and don’t need planning permission. However, if your home is a listed building or in a conservation area, you may need consent before making changes. It’s always best to check with your local planning authority.
CHOOSE THE RIGHT CEILING WINDOW
It’s easy to call any overhead glazing a ceiling window, but the details matter. If your window in a roof is part of a flat structure, it’s a rooflight. If it’s fitted flush into a pitched roof, it’s a roof window. Knowing the correct term makes it easier to choose the right product, explain what you need, and move your project forward.
If you’re still unsure what types of roof windows or rooflights are right for your home, contact us today, and we’ll help you find the perfect fit.
