Energy-efficient skylights can provide energy perks and several glaze options...much like donuts. Two or three coats of insulating glaze work to prevent fogging and hold in the jelly, er, any low-conductivity gas between the glass. (Make sure new skylights have a good warranty against air seal loss so you maintain those benefits.)
Energy-efficient skylights are also made of thicker glass than standard skylights, and they can brighten your home and make it more comfortable year-round like
energy-efficient windows.
When buying energy-efficient skylights, choose a double-pane, solar-control low-E, aluminum skylight. Also pick skylights with air leakage ratings that are low—between 0.01 and 0.06 cfm/ft. Need help navigating all these skylight specifications? The National Fenestration Rating Council (NFRC) label can help compare performance and other features of energy-efficient skylights.
2. Go to a hardware or window store or shop online to find the skylights you want.
3. Arrange to have your new, energy-efficient skylights professionally installed so it's done correctly and the warranty isn't voided (as it could be if skylights aren't properly installed).
Choose a skylight appropriate for your climate. Make sure skylights are appropriate for your region by reading the climate region map on Energy Star skylight labels. They indicate which of four broad climate regions the skylight applies to: Northern, North/Central, South/Central, or Southern.
Types of skylights that minimize heat. If summer heat gain is a problem in your house, look for skylights with low-e coatings, especially spectrally selective low-e coatings, which significantly reduce solar heat gain and improve insulation without affecting visible light or color. Tinted skylights also reduce solar heat gain, but they provide less light.