Q: I live in a small one-story house with a pitched roof. I want to add a skylight in my living room, and there is a tall attic above it. Is it still effective to add a skylight, and how do I do it? A ...

For his interiors studio, the designer Alfredo Paredes leases a 2,250-square-foot penthouse loft with an enormous skylight on 28th Street and Broadway. The glass slants up 15 feet from the floor and ...