A vapor barrier was not installed or was insufficiently covering the ground. The purpose of the vapor barrier is to prevent moisture from migrating from an area of higher moisture density to an area of lower moisture density. A vapor barrier that is not completely covering the ground could result in condensation when the warmer and moister air comes in contact with a cooler area or surface.

Conducive debris was observed in the crawl space. Cellulose or noncellulose material that provides no structural support but can be a source of food or provide habitat for wood destroying insects and rodents. This definition includes, but is not limited to, tree roots, stumps, formboards, scrap wood, paper, wood product, paper product, or other natural or manufactured products.

The floor supports were either not secured to both their footings and the floor structure or were insufficiently secured. Supports should be secured to the supported member to prevent lateral movement of the column and to resist wind uplift or seismic events. 

An insufficiently supported beam was observed. Structural beams are crucial to providing proper transfer of floor and wall loads to components such as the foundation, load-bearing walls, and support columns or posts. Beams not supported properly can result in sloping floors and other structural issues with the floor system. Further evaluation is required.

Under-floor insulation was missing throughout the crawl space. Insulation under the floor is installed to help maintain the desired temperature within the home. Missing insulation will result in greater than intended heat loss or gain.

Water supply pipe insulation was missing or incomplete. Insufficient insulation coverage will result in greater than intended heat loss or gain, and possibly result in condensation issues in the affected area. Freezing temperatures can cause cold, uninsulated pipes to burst under certain conditions.

HVAC ducts were missing insulation or were observed inadequately insulated. Missing or inadequate insulation contributes to system inefficiencies and increases the expense of heating or cooling

Leaking was observed from the drain pipes in the crawl space. Leaks in water pipes can lead to moisture damage to surrounding components and can result in expensive repairs. Left uncorrected, minor leaks can permit mold and rot to occur which can have significant effects on the health of the home's occupants and the integrity of the structure.

Some waste pipes were poorly supported or had an improper slope. Waste pipes that are not sloped or supported properly can result in slow draining of wastewater or backups.