If you are planning to install a skylight at your home or looking forward to replacing an old skylight, then you must make sure that the installation is done appropriately. If it is not, then you are sure to end up with lot of leakage in the attic space and believe me, leakage can cause more harm than you can imagine. A leakage can not only let the rain water seep in, but give breathing space to bacteria and other micro-organisms that may cause health and hygiene issues. Leaving aside that, a skylight with leakage is less energy efficient than the one that is not. Easy steps to ensure there is no leakage in skylights: 1. You must buy the kind of flashlights that suit your roof. There are three kinds of flashlights: curb mounted, deck shaped and flash. You must choose the one that is ideal for your roof. The best thing to do is to take the help of an expert in choosing the skylights for your home. 2. Once you have figured out what sort of skylights you need, you must look for the ones that are maintenance free and have 1-2 year guarantee.