Skylights are quite popular window choices among UK homeowners. They are beautiful and practical home improvements that can provide natural light and ventilation to spaces that might otherwise be dim and stuffy. However, like any other type of window, skylights may need to be replaced after a certain time. But how do you know whether your existing roof window needs to be replaced and what should you know before embarking on it?

In this article, we will look at the basics of skylight window replacement, including the different types of skylights available, their costs, and the key factors to consider when choosing a roof window replacement. Whether you are a homeowner looking to update the aesthetic and functionality of your home, or a business owner seeking to provide a better working space for your employees, read on to learn what you need to know about skylight window replacement.

How do you know when to replace a skylight?

Skylights can wear out over time. They can start leaking and being less energy efficient. They may also become outdated, negatively affecting the appearance of your home. Some people choose to replace their roof windows due to aesthetic reasons, for instance when these pieces no longer match the style of the property. Others consider this step because the window is too old or damaged and is not as efficient as it used to be.


What are the signs that indicate your skylights need to be replaced?

Here are some signs that you should look for when deciding whether to replace your roof windows:

  1. Water stains or moisture around the skylight: Any leaks around the window are a clear sign that it is no longer functioning properly and needs to be changed with a new one.

  2. Your skylight is letting a draft in - If you think that your skylight is not as energy-efficient as it once was, then it might be time to consider replacing it.

  3. The skylight gets discolored or faded: Is your skylight no longer letting in as much light as it once did? It could be due to window discoloration or fading. You can resolve the issue by replacing the old window with a new one.

  4. There are cracks or other visible damage on the window: If you notice cracks or other breakdowns in your skylight, this is a clear indication that it needs to be replaced. In such cases, it is best to act quickly because even minor cracks can lead to larger problems over time.

  5. Your skylight is outdated or no longer matches the style of your home: If you feel like your existing window is too old and out of style, then you can simply replace it with a more contemporary alternative.

How often do skylights need to be replaced?

The average lifespan of skylights can be anywhere from 10 to 25 years. However, several factors may influence the longevity of your roof windows, including:

  1. The type and quality of the skylight: There are various kinds of skylights and some might last longer than others. Glass skylights, for example, are considered one of the most durable types because they are made of strong material which can withstand various weather conditions.

  2. The quality of the installation: The installation process plays a significant role in the lifespan of skylights. Poor installation can lead to leaks, drafts, and other issues that can shorten the lifespan of your roof window. To ensure the longevity of your skylight, it's essential to hire a professional skylight installer.

  3. Environmental factors: Some environmental factors, such as weather, UV radiation, temperature changes, and moisture can significantly affect the lifespan of the roof windows.

What types of skylights are available?

There are various types of skylights available including fixed, ventilating, tubular, pyramid, round, and custom skylights. In addition, they can be installed on different kinds of roofs such as flat roofs and pitched roofs. Many skylight suppliers also offer customized windows that are designed to suit a specific roof type.

Various shapes of skylights

  1. Fixed skylights: These roof window types are stationary. They do not open but only provide roof light. They are a more cost-effective option and are suitable for buildings where ventilation is not necessary. Fixed roof windows are available in different shapes, sizes, and materials.

  2. Ventilating skylights: Such windows can be opened to allow fresh air into the space. They can be a perfect addition to wet and moist areas such as bathrooms and kitchens. Installing a ventilating skylight is a great way to improve the air quality in the building.

  3. Pyramid skylights: As their name applies, these are skylights that have a pyramid shape. They have four triangular panes of glass that connect at the central part of the window. These skylights are usually installed on curbs on flat roofs and in addition to improving the lighting, they can give your space a modern appearance.

  4. Tubular skylights: These are small roof window units that use a reflective tube to bring natural light into the room. They can be a great addition to tiny spaces such as closets, bathrooms, or hallways.

  5. Round skylights: These skylights have a round or circular shape and are normally installed on a roof or a high wall. They can be made from various materials and come in different styles and sizes.

  6. Custom skylights: These skylights can be made to suit your particular needs and preferences. You can choose the size, shape, and material of your replacement window. They can be an ideal option for unusual and unique spaces.

Types of roof constructions

Skylights can be designed to fit different kinds of roofs. Based on that they can be divided into a few types, including:

Flat roof skylights

As their name suggests, these windows are intended to be installed on flat or low-slope roofs. They can be made of glass or polycarbonate material and might be fixed or operable. Flat roof skylights are also available in different sizes and shapes including round, tubular, and pyramid. When installed flush with the roofline, these windows can give a very stylish and modern appearance to the building.

Pitched roof skylights

These are roof windows installed on buildings with sloped roofs. As with flat roof skylights, these windows can be made from various materials as well as in various shapes and sizes. They can provide your property with a very sleek and modern look. However, pitched roof skylights are usually more expensive due to the complexity of the installation process.