Energy efficiency in the home is incredibly important. If you buy a new home, it will have an energy performance certificate, or EPC, to show how efficient it is. This will indicate how much energy it will take to run, and subsequently, how much it will cost you. It’s not cost effective to have an inefficient home. So how energy efficient are rooflights? It largely depends on their age and their quality – a high quality rooflight with a low u-value will be very energy efficient. There is double and even triple glazing available, making rooflights good at maintaining a consistent temperature. Older rooflights will generally not perform as well and may let warm air escape, or make a room too hot in the glare of the sun during summer. Replacing old rooflights is a good way of improving energy efficiency and making sure your home is using energy in the most efficient ways possible.