What is the minimum width for pressure-sensitive aluminum foil tape?

What is the minimum width for pressure-sensitive aluminum foil tape?

• A. 2 in.
• B. 2 ½ in.
• C. 3 in.
• D. 4 in.

Answer: (B)

Sealing duct joints with pressure-sensitive aluminum foil tape needs enough width to fully cover the seam and provide a solid overlap onto clean duct surfaces. A width of 2 1/2 inches gives enough surface area to span typical seams and create a reliable edge-to-edge bond, reducing the chance of air leaks or tape peeling under pressure. Using narrower tape can leave the seam inadequately covered, while wider tape is fine but not the minimum required. So, 2 1/2 inches is the smallest width that reliably meets the sealing needs for standard HVAC duct joints.

Sealing duct joints with pressure-sensitive aluminum foil tape needs enough width to fully cover the seam and provide a solid overlap onto clean duct surfaces. A width of 2 1/2 inches gives enough surface area to span typical seams and create a reliable edge-to-edge bond, reducing the chance of air leaks or tape peeling under pressure. Using narrower tape can leave the seam inadequately covered, while wider tape is fine but not the minimum required. So, 2 1/2 inches is the smallest width that reliably meets the sealing needs for standard HVAC duct joints.