Windows and Draperies:

This seems like a small area tospecialize in, but the windows of a house or building play a big role in the overall structure. They are a source of energy efficiency in every home, and they are often changed on a yearly basis. Basic heating and cooling knowledge helps, as well as dry walling, and space management.
· Lighting: The lighting of any area is often a bit more complicated than plugging a lamp into a socket. Often, it is the addition of special lighting that can completely change a room’s environment. Some small additions or subtle lighting can change the way a room feels. Lighting is an often overlooked sub branch of Interior Design.