When water penetrates or forms within a building’s wall assembly without an avenue to escape, it can be the catalyst for a host of issues that can compromise the integrity of the structure. From mold growth to rot and insect infestation, the problems associated with moisture intrusion can lead to financial and health repercussions that can ruin the reputation of the builder. For example, the case of a Florida municipal building where only a few weeks after opening, employees began complaining of chronic sinus problems, allergy attacks and headaches and asthma, ultimately resulting in $20 million of repairs and other associated costs1.
The undermining cause of these symptoms was severe mold growth, a direct result of excess moisture in the building, caused by a combination of rainwater leaks and a HVAC system that pulled moist outside air into the building during the hours when the cooling system had cycled off. Once the HVAC system became infected with mold, it dispersed spores throughout the building, infecting the indoor air quality of the enclosure.