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Why is my Skylight Leaking?

October 24, 2022

Skylights are a great way to allow natural light to fill your home. However, they are notorious for leaks since it can be difficult to seal them and they are coming in direct contact with rain, as opposed to windows that are on the side of your house. If you have noticed a leak coming from your skylight, you may be wondering why your skylight is leaking. Continue reading for several reasons why your skylight may be leaking.

Improper Install

The installation of a skylight is very meticulous and requires attention to detail. To install a skylight, a hole has to be cut in the roof, and have a window fit into it. If the window is not fitted properly, this leaves the skylight susceptible to leaks. To prevent having a skylight improperly installed, it's extremely important to hire a reputable and skilled contractor.

Damaged Flashing

Flashing is the metal roofing material that is used to prevent leaks. Over time, flashing will deteriorate or corrode which will cause leaks. Luckily flashing can easily be replaced to improve the integrity of your roof and skylight. There could also be a gap between your skylight and the flashing which is leading to the leaks. For any gaps, roof cement can be used to fill them.

Lack of Caulking

All windows should be sealed in between the glass and the frame as well as between the frame and the roof. If there is a leak between the glass and the frame, caulk could be the solution.

Poor Insulation

A lack of insulation can lead to condensation on your skylight's glass. Condensation occurs when warm air from inside rises and touches the glass while it is at a lower temperature due to the lower temperature outside. Poor insulation can also cause rain to come in.


Other than a difference in temperature inside and outside the home, there are several causes of condensation. Debris could have damaged the material surrounding the skylight allowing condensation to seep inside. If there are cracks in any of the joints and corners of the skylight or damaged weather stripping, condensation can appear.

If you think you may have a leak in your skylight, it's time to call a roofing contractor. Here at ARAC Roof It Forward, we offer a free video roof inspection so we can diagnose the problem. After the inspection, we will show you the damage, review your repair options, and provide a cost estimate. Schedule your free video inspection today.


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