Air Duct Cleaning Services › Duct Leakage Sealing Service
Duct Leakage Sealing Service in Alexandria, VA
Duct leakage is one of the most common and costly problems in residential HVAC systems, and most homeowners don't know they have it. Gaps at joints, collars, and seams let conditioned air bleed into attics, crawlspaces, and wall cavities instead of reaching your rooms. We locate those leaks and seal them with mastic compound or metal-foil tape rated for duct systems — not the duct tape from a hardware store, which fails within a few years.
Alexandria Air Duct Pros provides duct leakage sealing service for homeowners across Alexandria, VA. Call for a free inspection and a written quote before any work begins.
When to Call
When You Need Duct Leakage Sealing Service
- Your utility bills are higher than your neighbors' in a comparable Alexandria rowhouse
- Rooms above your garage or at the end of long duct runs never reach the set temperature
- You can feel air movement in your attic near duct connections on a cold January day
- An energy audit flagged duct leakage as a primary source of efficiency loss in your home
How It Works
Our Process for Duct Leakage Sealing Service
- 1
Leakage Assessment
We pressurize the duct system and measure total leakage before touching anything, so you have a baseline to compare against after sealing.
- 2
Leak Location
Using smoke pencils and physical inspection, we identify exactly where air is escaping — joints, collars, flex connections, and plenum seams.
- 3
Mastic or Tape Sealing
Each identified leak gets sealed with the appropriate material for that joint type and location, applied to a clean, dry surface.
- 4
Post-Seal Measurement
We re-pressurize and measure again so you can see the actual reduction in leakage before we leave.
Alexandria Context
Why this matters in Alexandria
Alexandria homes built before the 1990s rarely had duct sealing done at installation — it simply wasn't standard practice. Those systems have been leaking for decades, and sealing them now makes a measurable difference in both comfort and heating and cooling costs.
Straight Talk
About pricing & scope
Sealing scope depends on how many leaks exist, where they're located, and how accessible those locations are. Leaks buried in finished ceilings or tight crawlspaces take more time to reach and seal properly.
What This Fixes
Problems We See in Alexandria
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