Adding French doors to a living room creates indoor-outdoor functionality and supplies the space with natural light. Before adding French doors to your living room, consider which direction they'll need to swing. If seating will be placed within 36 inches of the doors, it's best to choose an outward-swinging style for optimum traffic flow. If the space just inside the doors will be unobstructed, an inward-swinging option will work well. Most home improvement stores offer inward- and outward-swinging doors for the same price.