Why is duct cleaning mandatory before the sealing process?

Professional duct cleaning is a mandatory requirement immediately before the Aeroseal sealing process to officially certify the installation and guarantee its lifetime durability. This sequence is essential for three primary reasons:

• It Ensures Proper Adhesion: The Aeroseal adhesive formula is designed to bond with metal edges to permanently close leaks. However, the polymer requires a clean, dust-free surface to attach properly. If a duct is full of accumulated “legacy dust” or dirt, the sealant particles will simply adhere to the loose debris rather than the actual structure of the ductwork, which severely compromises the integrity of the seal.
• It Protects Your Living Spaces from Contamination: The computerized Aeroseal process significantly increases the air velocity and pressure throughout your home’s duct system. If the existing dirt and allergen buildup are not removed beforehand, the pressurization process will forcefully blow all of that trapped contamination straight through your registers and into the air you breathe. Cleaning the system first ensures maximum bonding while maintaining pristine indoor air quality.
• It Preserves the Newly Applied Seal: As established in our previous conversations, professional duct cleaning is a heavy-duty mechanical process that involves whipping and brushing the inside of the ducts to knock caked-on dust loose. If technicians were to perform this mechanical agitation after the system was sealed, they would run the serious risk of scraping or chipping away the freshly applied polymer barriers.

By executing these steps in the proper order—where technicians thoroughly clean each duct run and immediately insert register blocks to prepare for sealing—you ensure the system is completely pristine before the permanent health barrier is built