A good roof is underrated. Not enough homes today have easy access to their shingles. People used to use the tops of their dwellings much more in the past. Window's Walks along coast towns were popular during the Victorian era for wives waiting for their mariners to come home. Roofs make great diving boards for collage kids. Even a song was written about spending time Up On The Roof. But I would venture to bet that the law probably discourages roof-top practice. Too bad--it's like adding square footage to your at-home, outdoor experience.