Skylights can be a great addition to a dark room; they allow in lots of extra light that may not come through the windows because of trees or the positioning of the house. They’re considered a big plus in real estate transactions, even though they don’t cost that much to install.
As great as they are, however, they require homeowners to cut a big hole in their roof, which seems counterintuitive to protecting their home from the elements. While skylights look like windows, they have one crucial difference — they’re not vertical. This means, despite careful installation, they may let more than light into a home. They often let water in as well.
Skylight leaks are not always apparent. Sometimes the water seeps in insidiously, slowly rotting the wood surrounding the window and possibly spurring mold growth.