In ductwork, what is the role of wire mesh?

• A. Primary securing method
• B. Moisture sealing only
• C. Noise reduction
• D. In conjunction with other methods for securing duct sections

Answer: (D)

Wire mesh serves as a reinforcing layer for duct joints, not a sole fastening method. It is laid over the seam and embedded in the joint sealant, then held in place with additional securing methods like tape or mechanical fasteners. The mesh distributes stress, helps prevent the seal from cracking as the duct expands, contracts, or vibrates, and keeps the seal intact across irregular joint surfaces. Because of this reinforcing role, it works in conjunction with other methods to secure duct sections, rather than acting alone, being solely for moisture sealing, or primarily for noise reduction.