If you have a space that has a rooflight in it, you need to make sure it’s going to be warm enough. It’s important that you don’t lose heat and make your room uncomfortable, otherwise a rooflight will not have been a good investment at all for you.
It’s now possible to get very thermally efficient, highly advanced rooflights on the domestic and commercial market. If you have a highly thermally efficient rooflight, it’s much less likely that you will need to do anything to the rooflight and the space once installed. You should choose a rooflight that is double or triple skinned, or that has very low u-values to ensure it isn’t going to let heat escape. This is the most important part of choosing a rooflight – making sure it is going to complement your space and make it better, not worse. Ask your supplier about the intricacies of rooflights and thermal efficiency if you have any concerns.