There are two types of Building Inspections: 1) External and 2) Internal. An external inspection is conducted by walking the exterior of a building to look for downspouts that outlet into the ground, drains, and other potential exterior drainage features. An internal inspection requires access to the building, typically to the basement, to look at the sump pump setup and connections. In some cases, an inspection may also require dye tracing to determine whether an identified connection is actually connected to the sewer system. Dye tracing is simply water (mixed with non-toxic, fluorescent dye) poured into the connection (drain, downspout, etc.) with CCTV cameras inserted in the system to track the flow and see whether the dye is present in the sewer system.
