1 -1989 was established to require energy efficiency in new buildings greater than three stories.
Metal buildings are by nature, very thermally inefficient.
A natural property of metal is heat transference. Metal buildings require greater effort to be properly insulated than do other building structures, yet many insulation providers use obsolete methods of insulating, without giving consideration to the unique properties of metal. Compression minimizes the R-values of the insulation drastically and creates the potential for many problems down the road. The exposure of the purlins and girts to the interior air will cause condensation and eventually corrosion and deterioration of the building. The new codes have posed a problem for many insulation suppliers who produce and install insulation without regard to retaining its R-values.