What a Professional Dryer Vent Inspection Covers
A professional dryer vent inspection is not just a quick visual glance at the duct — it is a systematic evaluation of every component of the exhaust system. Understanding what a thorough inspection covers helps you know what to expect from a service visit and how to evaluate whether an inspection you have received was complete.
1. Duct Material Assessment
The technician begins by identifying what material your duct is made of. Rigid galvanized steel or aluminum duct is the code-compliant standard. Flexible aluminum transition duct is acceptable for the short section from the dryer to the wall but should not be used in concealed spaces. Flexible foil or plastic duct is a fire hazard wherever it is found. The material identification shapes every subsequent recommendation from the inspection.
2. Duct Routing and Length
The technician traces the duct routing — how it runs from the dryer to the exterior — and estimates the total duct length. This is compared against code-allowable lengths based on the number and type of bends. An excessively long or improperly routed duct may restrict airflow even when clean, and this finding may warrant a duct modification recommendation rather than just cleaning.
3. Connection Integrity
Every joint and connection along the duct run is evaluated for proper sealing. Loose connections, separated duct sections, and deteriorated tape or sealant at joints can allow lint and moisture to escape into wall cavities or attic spaces. The technician identifies any connections that are compromised.
4. Baseline Airflow Measurement
Airflow at the dryer exhaust outlet or exterior vent is measured before cleaning begins. This gives a documented baseline that makes post-cleaning verification meaningful. Without a before measurement, there is no objective way to confirm the cleaning improved airflow.
5. Interior Duct Condition
Through the cleaning process, the technician evaluates the degree of lint accumulation, any physical damage to the duct interior, and whether there are zones of significantly heavier buildup that suggest a partial blockage or restricted section.
6. Exterior Cap Condition
The exterior vent cap is inspected for physical condition, appropriate type, flap function, presence of mesh screening (which should not be present), and any exterior obstructions including lint, debris, and pest nests.
7. Post-Cleaning Airflow Verification
After cleaning, airflow is re-measured and compared to the baseline. A thorough inspection concludes with a clear communication of findings, any recommendations, and the documented airflow improvement. Contact our Bloomington team to schedule a complete inspection visit.