Yes, skylights will almost always heat up your house, especially if they’re positioned to let a lot of sunlight in throughout the day. If you’re concerned about skylights making your home too hot, we recommend adding a shade.
Typically, a properly installed skylight will last between eight and 15 years. This assumes regular maintenance, repairs when needed, and ensuring the skylight is kept clear of leaves, branches, and snow.
There are a number of reasons a skylight might leak—it could be ill-fitting against your roof, allowing moisture to seep through. Alternatively, the weatherstripping or flashing might be beginning to fail. It could also just be condensation building up on the inside of the glass and dripping down, possibly caused by running an air conditioner too often.
Typically, replacing a skylight takes three to five hours, depending on the nature of the problem and the accessibility of the unit. For larger skylights, custom shapes, very high ceilings, or in areas with obstacles in the way, installation might take longer.