Master the Certified Energy Auditor Exam 2025 – Power Up Your Energy Audit Skills!

Installing exterior wall finishes like siding with an air space between the finish and the structure promotes proper drainage and ventilation. This gap allows any moisture that might become trapped behind the siding to evaporate, reducing the risk of mold growth, wood rot, and insulation damage. The air space also helps in mitigating heat transfer, which can improve the overall energy efficiency of the building.

When siding is installed directly against the structure, there is a higher likelihood of moisture accumulation, which can lead to various issues over time, such as deterioration of both the siding and the underlying building materials. Utilizing moisture barriers alone may not effectively address ventilation needs, and installing siding on sloped surfaces may not be appropriate for all building designs or siding types. Therefore, maintaining an air gap becomes essential to ensure the longevity and performance of the external wall finishes.