Walls and ceilings are the surfaces in our homes that partition our spaces and provide a sense of enclosure. They are both functional and, to state the obvious, important to the look of our interior spaces. This section of HomeTips explores walls and ceilings—how they are built, the various choices available for building and finishing these surfaces, and how to install and maintain wall and ceiling materials.For interior painting, see Paint & Painting, and for wallpaper and coverings, see Decorating & Furnishing.