The construction documents include drawings and written specifications. These documents serve as the "how-to" manual for the contractor, defining your agreement and expectations. Drawings typically include: site and floor plans; interior and exterior elevations; building and wall sections; building and finish details; door, window, plumbing, appliance, and finish schedules; structural plans and details; and mechanical & electrical plans. Specifications define the acceptable products that are to be used in the home. With the common use of products that release harmful substances into interior spaces, it is critical that these be defined. The specifications provide contact and source information for healthy products as a tool for the contractors and subcontractors.