It’s unfortunate that the very concept of “duct repair” will almost immediately cause most people to think of “duct tape.” However, standard duct tape—a gray-backed cloth tape—was never designed for use on ductwork (it was originally for sealing ammo boxes in World War I and was appreciated for its water-resistance). Laboratory tests have shown that it duct tape is almost useless when applied to working ventilation systems because the changes in temperature quickly strip away their adhesive.
So what do duct repair professionals use when it’s time to seal up leaks in ductwork? They use some specialized tools, along with their own extensive knowledge of repairing ventilation systems.
For your duct repair needs in Sandy Springs, GA, rely on the skilled ductwork service team at South Air Inc to effectively handle your situation.
The tools of duct repair
- Mastic sealant: One of the most common ways to seal up smaller leaks and holes in ductwork is mastic sealant, a resin-based sealant that adheres to most surfaces, including plastic, metal, and ductboard (the basic materials of ventilation systems). Mastic dries quickly and forms a smooth surface so it won’t interfere with airflow. But it maintains flexibility even when dry, so it will not break apart when ductwork expands as it heats. It also has high heat resistance. Ductwork technicians apply mastic using a caulking gun.
- Metallic tape: This is true “duct tape,” not a cloth-backed adhesive tape. Metallic tapes permit a duct repair specialists to create an actual metal joint on ductwork, which is a reason that some technicians prefer tape over mastic. Metallic tape is better for joints that will see increased stress. Tape lasts longer than mastic, and has a higher heat tolerance. In many cases, whether a technician uses mastic or metallic tape comes down to personal preference or the type of damage that needs repairs, since both are very effective and have similar strengths.
It is important to have your ducts kept in good shape, since any leaking along their surface will ruin the airtight seal they need to prevent a loss of air pressure. When you have damaged ducts, you will experience a loss of heating and cooling from your HVAC system as well as an influx of dirt and dust contamination into the ventilation system that will lead to a drop in your air quality.
At the first sign of a struggling HVAC system or a reduction in your indoor air quality, call for the NATE-certified specialists at South Air Inc. to see if you need duct repair in Sandy Springs, GA. If you do, you can trust our team to bring the best tools to get the job done.