To install the skylight fixture, you need to expose the plywood around the roof opening you just cut, out to about 16 to 24 inches. To do this, you use a cat's paw to find the nails holding down ...

The cost of the new skylight was $2,400 and the installation was only $300 given the existing opening in the ceiling. (To open a new hole would have cost $1,000 to $1,500.) ...

The short, dreary days of winter are a good time to think about adding skylights to brighten dark rooms. Advice on Choosing, Installing Skylight - Los Angeles Times ...