Skylight ceiling opening

mt232

I'm planning the installation of a skylight for my sisters house. The house is a ranch with about 3 feet of attic above the room. Is there a guideline of how large the opening in the ceiling should be, for example, if the sklight ic 24" x 36".......the thought was to frame out the ceiling larger to maximize the light that can come in. I'm wondering if there is a standard to g by, or anyones good experiences.

thank you!

troubleseeker

It is generally accepted that splaying the light tunnel disperses light over a wider area into the room, But the angle of the sides is a matter of individual visual taste , there is no "rule" that I know of. I personally do not like the tunnel to be splayed at all, it does not look good to me personally.

amakarevic

hi. can you tell me if the above dimensions pertain to the rough framed opening without drywall or finished with drywall?

thanks