Are Rooflights Energy Efficient?

If you’re looking at installing a roof light into any building, energy efficiency and thermal insulation will be top priority. Not only do building regulations require that buildings must now be as energy efficient as possible, the comfort of the occupants below should also be one of the first things to be considered when installing a roof light.

In the past, concerns have been raised around roof lights and whether they’re energy efficient enough. There’s a common misconception that all of the heat in a room is sucked straight out of the roof light. However, this is no longer the case and recent technologies mean that they can actually be more energy efficient than a standard roof due to passive solar gain and insulating technologies.

When properly selected and installed, roof lights can provide any building with extra natural light and ventilation whilst also helping to minimise heating, cooling and lighting costs.

At Xtralite, we have a range of materials and options to suit every project and make sure the correct roof light is specified for every project. Understanding the energy performance ratings of roof lights and their materials is important so that the correct material, size and fittings are selected to suit the local climate, the design and use of the building.

Reduce Artificial Lighting

When a roof light is installed in a building, its primary purpose is usually to allow maximum levels of natural light to flood into the building below. In fact, research has shown that roof lights can provide up to three times more natural light than standard windows.

Making the most of the natural light available greatly reduces the need for artificial lighting which dramatically reduces energy bills. The levels of daylight allowed into the building will always depend on the type of building and positioning of the roof light, so when specifying any roof light, it is important to make sure it’s in the correct position to make the most of the available light but also prevent a building from becoming too hot in the summer months.

Research has shown that rooflights can save energy in many applications and the greater the rooflight area, the greater the potential savings. The amount of energy needed to light a building artificially is often much greater than the amount of energy used to heat it and is often the greatest single energy use in operating the building. Cut energy costs by reducing the need for use of the electric lights.

Cut Heating Costs

Passive heat or solar gain will reduce the need for central heating or other heating appliances if positioned and specified properly. Light and heat filters into the building and warms the room below up. At Xtralite, we have developed technology to ensure that our roof lights benefit from as much passive heat gain as possible when needed. Our materials are designed to absorb heat in the winter to warm the room but reflect it in the warmer months to prevent the building from becoming uncomfortably hot.

Research has shown that roof lights, when installed correctly, can help to dramatically reduce the amount of Co2 emissions a building produces. The need for artificial light is unavoidable and consumes a lot of energy. However, increasing natural light reduces the reliance on artificial lighting which dramatically cuts energy use.


Ventilating skylights open outwardly at the bottom and help release the hot air that naturally accumulates near the ceiling. Allowing fresh air into your home or business premises is healthier than using air purifiers and air conditioning units which use up energy.

At Xtralite, we ensure that our materials and roof lights are as energy efficient as possible and meet the most current and up to date regulations. When installing an Xtralite roof light, we have a team of experts to ensure that it is fit for purpose and will keep both the occupants of the building in mind in addition to aesthetics and practical elements.