After Pest Removal, Don't Overlook Damaged Ductwork
The pests have been removed, their entry points have been closed, and the attic is quiet again. Before you put the whole experience behind you, there is one more place to look: the ductwork.
Squirrels, mice and other pests can leave damage that stays out of sight long after they are gone. Chewed flexible duct, missing insulation and loose connections can affect how your heating and cooling system moves air through the house. Nesting material and debris may also need to be removed from affected ducts and the surrounding area.
At Duct Doctor of Southern New Jersey, we have extensive experience dealing with what pests leave behind. We can help you work through the next steps, from replacing damaged ductwork to cleaning and sanitizing the affected system, and in many cases cleaning up affected attic or crawl-space insulation. You do not have to figure out how those pieces fit together on your own.
Why damaged ducts need attention after pest removal
In an attic or crawl space, flexible ductwork is an easy target. Animals can chew through the covering, pull away fiberglass insulation or damage the air passage inside. They can also disturb connections and leave sections loose or disconnected.
Once a duct loses its airtightness or insulation, it is no longer doing the job it was installed to do. A damaged supply duct can send heated or cooled air into the attic or crawl space. An opening in a return duct can draw air and loose material from that space into the system.
Chewed covering and exposed fiberglass may be all you can see from outside. We do not need to peel apart an already damaged flex duct just to prove that an animal reached the inner liner. If its air seal or insulation has been compromised, the affected section needs to come out.
Pest-damaged flex needs replacement, not a patch
When pests have damaged flexible duct enough to compromise its airtightness or insulation, we replace the affected section. We do not offer a tape patch as a repair for chewed flex or missing fiberglass. Flexible duct with wet insulation also needs replacement.
The replacement work includes the connections, support and routing. A new section needs to fit the system and the available space, with secure connections at both ends.
Removing damaged flex also opens the connected ductwork to the surrounding work area. We plan the replacement and cleaning together so the open ends, debris and affected parts of the system are handled in a sensible sequence. That is one reason to tell us about pest damage when arranging duct cleaning, rather than treating the replacement as an unrelated job.
Other duct materials and connection problems may allow repairs. We will explain which parts need replacement and where a repair is appropriate for the material and condition we find.
Cleaning up what the animals left behind
If pests have contaminated the duct system, the cleaning needs to address the system as a whole.
Duct Doctor plans that cleaning together with the ductwork restoration. Depending on the damage, the work may include replacing compromised flex, repairing or replacing corroded metal duct sections, securing and sealing connections, and restoring damaged insulation around otherwise serviceable ductwork. We address openings that allowed pests into the ducts and coordinate those repairs with the pest contractor's work to keep them out of the home.
Our source-removal cleaning process combines controlled loosening of accumulated material with continuous negative-pressure collection throughout the system. NADCA recommends whole-system cleaning because contamination left in one part can spread back into cleaned areas. Coordinating the cleaning and repairs allows us to address both the contamination and the damaged ductwork in one planned project.
In many cases, Duct Doctor can also provide cleanup and removal of affected attic or crawl-space insulation alongside duct replacement or cleaning. Tell us what the pest contractor found so we can include that work in the discussion and explain what we can handle as part of your project.
Sanitizing the affected ductwork
Appropriate duct sanitization should be part of the agreed post-pest work, after debris has been removed and damaged ductwork has been replaced or repaired.
Duct Doctor uses EPA-registered, food-safe sanitizers that are safe for people and most pets when used as directed and highly effective at reducing microbial contamination on treated ductwork surfaces. We apply the treatment after source-removal cleaning and necessary ductwork repairs.
That gives you a coordinated plan for the affected system: remove the debris, replace damaged flex, complete other necessary duct repairs, then sanitize the surfaces being restored.
Keep the next animals out
As cooler weather arrives, take a look at the places that could give pests access to your attic or crawl space. Loose vent protection, damaged soffits, gaps around service penetrations and crawl-space doors that do not close securely deserve attention.
Have a qualified pest or wildlife professional handle removal and exclusion before occupied entry points are sealed. Animals or dependent young may still be inside; the Cooperative Extension squirrel guide explains why that matters. Entry protection also needs to preserve the ventilation or exhaust function of the opening.
Once that work is complete, we can coordinate the ductwork restoration with the pest contractor's findings. Their information about where the animals were active helps us prepare for the work that follows.
A brief electrical safety note: the same pests that chew duct insulation can also damage wiring, including nonmetallic cable commonly called Romex. After pest removal, have a licensed electrician examine wiring and electrical components in the affected attic or crawl space for damage that could cause a short circuit or fire. Duct Doctor does not provide electrical services.
One coordinated plan for the work that remains
Pest damage can leave a homeowner with several problems at once: damaged ducts, affected insulation, debris in the system and concerns about indoor air quality. Duct Doctor has the experience to help quarterback the work after pest removal, coordinate with the other people involved and explain what needs to happen next.
When you call, tell us where the activity occurred, whether removal and exclusion are complete, and what damage has been found. Photographs and notes from the pest contractor are helpful. We will work through the duct replacement, repairs, cleanup, cleaning and sanitization your project needs, including access and scheduling.
Call Duct Doctor of Southern New Jersey at (856) 375-1776 or contact us through our website. Our locally owned Cherry Hill company can help you get the remaining work organized and the affected ductwork taken care of.
About the Author
Anthony J. Micale III owns and operates Duct Doctor of Southern New Jersey. He holds Air Systems Cleaning Specialist (ASCS) and Ventilation System Mold Remediator (VSMR) credentials through NADCA and has personally inspected and cleaned thousands of residential and commercial HVAC systems. His articles draw on that field experience to explain source-removal duct cleaning, dryer-vent service and HVAC-system hygiene. Duct Doctor is a locally owned, fully insured and bonded NADCA member company based in Cherry Hill, New Jersey.