DBI has extensive experience with evaluation of building insulation issues that have involved required R-value or proper placement of the vapor retarder and air barrier systems. Lack of proper design or installation of the insulation, vapor retarder or air barrier can create conditions that lead to unwanted moisture entering the wall and roof assemblies from either the exterior or interior sides causing costly damage. DBI also examines building owner control over interior conditions that may additionally cause or contribute to unwanted high interior humidity and moisture damage.