7.5 Interior Living Space Exposures

Interior living space exposures are the areas within a building that are usually heated or air conditioned.

These spaces are sealed from most salt spray, and the humidity control provided in most conditioned spaces generally reduces humidity levels below those that contribute to accelerated corrosion rates.

In coastal areas, using more corrosion-resistant fasteners such as mechanically galvanized fasteners will better protect connections in the interior portions of exterior walls and wall connections to attic spaces as long as they do not receive salt spray. These areas typically have a relatively low chance of corrosion and are free of preservative-treated lumber. Fasteners for interior walls can be uncoated or electroplated galvanized fasteners.