How do we create leak-proof skylights? First, a Shelter Works skylight is not a skylight that is purchased and then cut in and installed in the roof. It’s actually formed into the roof during the molding process to provide a seamless finish with no joints, fasteners, seams or cracks.
During the forming process, we simply replace the foam insulation in the roof/ceiling with a translucent material that will let the light in.
Because it is one solid piece, it's guaranteed to never leak.