Portland ductwork cleaning, sealing & repair
Ductwork Cleaning, Sealing & Repair in Portland can mean a $200 fix or a $4,000 job depending on what's actually wrong. We figure it out before quoting. Service area covers Portland proper plus the metro suburbs. After-hours is real after-hours, not "we'll get back to you tomorrow."
How Portland jobs differ
Portland's housing market has us seeing a lot of move-in inspections and "the previous owner did what?" calls. We sort them out.
If you're calling from a property management company, we have separate scheduling and billing for that.
A recent ductwork cleaning, sealing & repair call
Last spring we got a call from a homeowner near the east Portland. Upstairs always 6-8° hotter than downstairs. Diagnosis: crushed flex duct in attic and 30% leakage. We replaced damaged section, sealed remaining ducts, added zone damper, temperature differential dropped to 1-2°, ran the test, and were out the door in about two hours. Total: $685 including parts.
The actual work
Most homes have leaky ducts losing 20-30% of conditioned air to attics and crawl spaces. Sealing the duct system is the highest-ROI HVAC improvement most homeowners can make.
We test ducts with a blower door + duct blaster, identify leaks, and seal them with mastic (better than tape long-term) or aeroseal injection.
Full duct replacement is rare — only on systems with collapsed flex-duct, severe pest damage, or major redesign needs. More common: targeted replacement of damaged sections plus sealing of the rest.
Price expectations
For ductwork cleaning, sealing & repair jobs in the Portland area:
- Duct leak test (blower door + duct blaster): $280 – $450
- Mastic duct sealing (whole house): $850 – $1,800
- Aeroseal injection: $1,400 – $2,800
- Damaged duct section replacement: $340 – $1,200
- Full duct system redesign + replace: $3,400 – $9,800