We repair, seal, and replace ductwork for both crawlspace and slab-based systems, and we measure airflow and static pressure so the fix actually solves your comfort problem.
Signs of duct problems
- Rooms that never reach the set temperature
- High bills despite a working AC
- Sweating or condensation on ducts in the crawlspace
- Musty smells suggesting duct mold
- Excess dust from unsealed return ducts
- Weak airflow and high static pressure
What affects your price
Figures below are published local benchmarks and non-binding estimates — never a quote. You'll get every charge in writing first.
- Published duct-repair benchmark $300–$950
- Extent — sealing vs. sections vs. full replacement
- Crawlspace vs. attic vs. slab access
- Insulation upgrades to stop condensation
What's included with ductwork services in Covington
Every ductwork services job is scoped and documented up front — here's what you get when we roll up to your Northshore home or business.
- Static pressure test to reveal restrictive, undersized, or crushed ducts starving your rooms of airflow
- Leak inspection at plenums, boots, and joints where conditioned air escapes into hot attics and crawlspaces
- Mastic and metal-tape sealing of leaks so you stop cooling the crawlspace instead of the house
- Insulation repair on sweating crawlspace ducts that drip and breed mold in our humidity
- Duct repair or full replacement when runs are collapsed, disconnected, or beyond sealing
- Airflow balancing so far rooms get their share instead of the register nearest the unit
- Before-and-after airflow readings documenting the improvement
Sweating ducts — a Covington humidity problem
When humid air meets a cold duct surface in a crawlspace or unconditioned attic, it sweats — and that condensation soaks insulation, drips, and breeds mold. In our high-water-table, high-humidity environment, this is one of the most common duct issues we find.
The fix isn't just wiping it down. We address insulation, sealing, and airflow so the duct surface stays above the dew point and the moisture stops forming in the first place.
Sealing, repair, or replacement
Leaky ducts can waste 20–30% of your conditioned air. We measure before recommending work: sometimes sealing joints and adding insulation is enough; sometimes crushed, disconnected, or mold-laden ducts need replacement. We'll show you the airflow and static-pressure numbers behind the recommendation rather than guessing.
Published duct-repair benchmarks run about $300–$950 depending on access and the extent of the work — attic and crawlspace conditions in Covington homes affect the cost.
Our ductwork services process
Test first, document everything, and get your sign-off before the work happens — no guesswork, no surprises.
- 1
Test the pressure
We measure static pressure to find whether ducts are too tight, leaky, or undersized for the system moving air through them.
- 2
Inspect the runs
We check plenums, boots, and joints, and look for sweating, uninsulated ducts dripping in the crawlspace.
- 3
Seal the leaks
We seal joints with mastic and proper tape so conditioned air reaches rooms instead of the attic or crawlspace.
- 4
Repair or replace
We re-insulate sweating runs and replace collapsed or disconnected sections that sealing alone can't save.
- 5
Balance and verify
We balance the registers and re-read airflow so every room gets its share, then leave you the numbers.
Why Covington homeowners choose HVAC Covington LA for ductwork services
15+ years on the Northshore, 4.9★ across 148+ reviews, and a licensed, insured, EPA-608–certified crew that treats your home like a neighbor's.
- Sweating, uninsulated ducts in Covington crawlspaces drip and grow mold, so we re-insulate them instead of just taping the leak
- We test static pressure, so we fix the real airflow restriction rather than guessing why a back bedroom stays warm
- Leaky ducts dumping cold air into a 92-degree attic waste your money, and our sealing keeps that air in the house
- Our high humidity and water table punish crawlspace ductwork, and we know the failure points to check on Northshore homes
- Documented before-and-after airflow readings prove the rooms actually improved, not just the promise of it
Where we provide ductwork services
We repair, seal, and replace ductwork, and fix sweating crawlspace runs, for homes throughout St. Tammany Parish. We handle ductwork services across all of St. Tammany Parish — from our shop at 2030 Phillip Dr, Covington, LA 70433. That includes St. Tammany Parish, Mandeville, Abita Springs, Madisonville, Lewisburg and River Forest, plus nearby Tangipahoa and Washington Parish communities. Call (327) 210-5999 and we'll confirm same-day or 24/7 emergency availability for your address.
Ready for ductwork services in Covington?
Same-day service across St. Tammany Parish · 24/7 emergency dispatch
Ductwork Services FAQs
Sweating happens when humid Covington air contacts a cold duct surface below its dew point — common with our high humidity and high water tables. The condensation soaks insulation and can breed mold. The lasting fix combines proper insulation, sealing, and airflow so the surface stays above the dew point.
Related Services
Helpful Articles
Troubleshooting
Sweating Ducts in the Crawlspace: A Covington High-Water-Table Problem
Ducts that drip and sweat in a Covington crawlspace point to a humidity problem the high water table makes worse. Here is what causes it and how to stop it.
Troubleshooting
Musty Smell When the AC Kicks On: Duct Mold in Bayou-Country Homes
That musty odor the moment the AC turns on usually traces back to mold in your coil or ducts. Here is why bayou-country homes are prone to it and how to clear it.
Seasonal Maintenance
Crawlspace Moisture Control: A Seasonal Checklist for Covington Homes
A high water table and constant humidity make Covington crawlspaces a moisture trap that attacks your ductwork. Here is a seasonal checklist to keep it dry.