Professional Duct SealingServices in Portland Metro
Stop losing 20-30% of your conditioned air through leaky ducts. Improve efficiency, comfort, and indoor air quality.
Why Portland Homeowners Choose Us for Duct Sealing
See how professional duct sealing can reduce your energy bills and improve comfort throughout your home.
Why Duct Sealing Matters in Portland
According to ENERGY STAR, the typical home loses 20-30% of conditioned air through duct leaks. In Portland's climate with cold winters and warm summers, that means hundreds of dollars wasted annually on air that never reaches your living spaces. Leaky ducts also draw in dust, allergens, and pollutants from your attic and crawlspace, degrading indoor air quality. Professional duct sealing with mastic sealant permanently stops these leaks, improving both efficiency and air quality.
Benefits of Professional Duct Sealing
Sealing your ductwork delivers immediate, measurable improvements for Portland homeowners.
Lower Energy Bills
Stop losing 20-30% of your conditioned air. Most Portland homeowners see 15-25% reduction in heating and cooling costs after professional duct sealing.
Even Temperatures
When all the air your HVAC produces actually reaches your rooms, hot and cold spots disappear. Every room gets the comfort it should.
Better Indoor Air Quality
Sealed ducts prevent dust, allergens, mold spores, and pollutants from entering your air stream through gaps in attics and crawlspaces.
Reduced HVAC Strain
When your ducts don't leak, your furnace and AC run shorter cycles. This extends equipment life and reduces repair frequency.
Safer Home Environment
Sealed ducts prevent backdrafting of combustion gases from gas appliances and block entry of carbon monoxide from attached garages.
Improved Humidity Control
Leaky ducts can draw humid air from crawlspaces or dry attic air. Sealed ducts help your HVAC maintain proper humidity levels.
Signs Your Portland Home Has Leaky Ducts
High Energy Bills
If your PGE or NW Natural bills seem high compared to neighbors with similar homes, leaky ducts could be wasting 20-30% of your heating and cooling.
Rooms That Won't Reach Temperature
When distant rooms stay too hot in summer or too cold in winter despite your HVAC running constantly, conditioned air may be escaping through duct leaks before reaching those rooms.
Excessive Dust in Your Home
Leaky ducts in your attic or crawlspace draw in dust and debris, then distribute it throughout your home. If you're constantly dusting, duct leaks may be the source.
Weak Airflow from Vents
If airflow from registers feels weak compared to when your system was new, air is likely escaping through gaps and disconnections in your ductwork.
Visible Gaps or Disconnections
If you can see daylight through duct joints in your attic or crawlspace, or notice ducts that have separated, you're losing significant conditioned air.
Stuffy or Musty Air Quality
Leaky return ducts can pull contaminated air from crawlspaces, attics, or wall cavities. If your home smells musty when the HVAC runs, duct leaks may be drawing in polluted air.
Suspect Your Ducts Are Leaking?
Our technicians can perform a duct leakage test and provide a detailed sealing estimate.
Call (503) 698-5588 for Free EstimateOur Professional Duct Sealing Process
Thorough inspection, professional-grade materials, and verified results.
Comprehensive Inspection
We inspect all accessible ductwork in your attic, crawlspace, basement, and unconditioned areas. We identify leaks at joints, connections, and boot-to-drywall transitions, and document findings with photos.
Duct Leakage Testing (Optional)
For homes with significant efficiency concerns, we can perform a duct blaster test to measure exactly how much air your system loses. This provides baseline data to verify improvement after sealing.
Surface Preparation
We clean duct surfaces to ensure sealant adheres properly. Dust and debris are removed from joint areas, and any damaged sections are repaired before sealing begins.
Professional Sealing
We apply mastic sealant to all joints, seams, and connections. For larger gaps, we use fiberglass mesh embedded in mastic for permanent repair. We also seal boot-to-drywall connections where supply and return registers meet walls/ceilings.
Verification Testing
After sealing, we verify airflow improvement at registers and can perform post-sealing duct leakage testing to document the reduction in air loss. You receive documentation of the work completed.
Professional-Grade Sealing Materials
We use only professional-grade materials that last for decades:
- Mastic Sealant: Water-based adhesive that hardens permanently and flexes with temperature changes
- UL-Listed Foil Tape: Heat-resistant aluminum tape for metal-to-metal connections
- Fiberglass Mesh: Reinforcement for large gaps embedded in mastic for permanent repair
Note: We never use cloth "duct tape"—despite its name, it fails within a few years and is not suitable for HVAC ductwork.
Serving Portland Metro Area
Professional duct sealing services throughout the greater Portland area
Portland Duct Sealing FAQs
According to ENERGY STAR, the typical home loses 20-30% of conditioned air through duct leaks before it reaches living spaces. In Portland's climate with significant heating demand in winter and cooling in summer, this translates to hundreds of dollars wasted on your PGE and NW Natural bills annually.
We use professional-grade mastic sealant (a thick paste that hardens permanently), UL-listed foil tape for metal connections, and fiberglass mesh for reinforcing larger gaps. These materials last for decades—unlike cloth 'duct tape' which dries out and fails within a few years.
Most Portland homes can be completely sealed in 4-8 hours, depending on system size and accessibility. Larger homes or systems with extensive leaks in hard-to-reach areas may take longer. We complete most jobs in a single visit.
Costs typically range from $300-$1,500 depending on home size, duct accessibility, and extent of leakage. Most homeowners see the investment pay for itself within 1-3 years through energy savings. We provide detailed written estimates before any work begins.
Despite its name, cloth duct tape is not effective for sealing HVAC ducts—it dries out and fails within a few years. Professional mastic sealant is the industry standard and lasts for decades. For best results and long-term efficiency, professional sealing is recommended.
Related HVAC Services
Duct Cleaning
Remove dust and debris for cleaner air after sealing your ducts.
Duct Insulation
Add insulation after sealing for maximum energy savings.
Ductwork Modifications
Reconfigure ductwork for better airflow and comfort.
Energy Audits
Comprehensive home energy assessment to identify all savings opportunities.
Ready to Stop Wasting Energy?
Get a free duct sealing assessment and start saving up to 30% on your energy bills.
Free estimates • Professional-grade materials • Since 2008