What could compromise the function of mechanical penetrations in a building?

The function of mechanical penetrations in a building can be significantly compromised by improper flashing or sealing. Mechanical penetrations often include pipes, ducts, or wires that pass through building envelopes, such as walls or roofs. If these penetrations are not properly flashed or sealed, it can lead to air and moisture infiltration. This not only impacts the building's energy efficiency by allowing conditioned air to escape and unconditioned air to enter, but it also raises the risk of water damage, mold growth, and structural deterioration due to moisture intrusion. Proper installation techniques and materials for flashing and sealing are critical to ensuring that these penetrations maintain the integrity of the building's air barrier system.