Dripping A/C Ducts in Your Crawl Space? Stop Mold, Humidity & High Energy Bills.
Water dripping off the ductwork under your house isn't a leak — it's condensation, and it's steadily soaking your subfloor insulation and feeding mold that your supply air can carry upstairs. We clean, seal, and dry the whole system out.
- HEPA extraction of the flex ducts
- Mastic-sealed joints and connections
- Crawl space humidity brought under control
- Video-documented inspection
It's Condensation, Not a Leak
What you're finding
- Beads of water clinging to and dripping off the flexible ducts.
- A vapor barrier or dirt floor that stays wet directly beneath the ductwork.
- Subfloor insulation sagging or stained under the duct runs.
- A musty, mildew smell that seems to rise into the rooms above.
Why it keeps happening
- Chilled air inside the duct meets warm, humid crawl space air on the cold outer surface.
- That temperature clash pulls water out of the air, exactly like a cold glass sweating.
- The constant moisture keeps the space damp enough for mold spores to thrive.
- As supply ducts, they can move those spores into the air your family breathes.
Cold Ducts, Warm Ground Air, Wet Floors
Every surface has a temperature at which the air touching it can no longer hold its moisture. Your flex ducts run cold because they're carrying conditioned air, and a Hampton Roads crawl space in summer is a reservoir of warm, humid air rising off the ground. Where that muggy air meets the cold duct, it crosses that threshold and its moisture condenses into the drips you're seeing.
Wiping the ducts down does nothing, because the air keeps supplying more water. The only durable fix attacks all three parts of the equation at once — clean the ducts, seal them so the cold stays inside the duct instead of chilling the outer skin, and lower the crawl space humidity so there's less moisture in the air to give up in the first place.
Inspected and verified with digital video by Lead Technician Jacob
Before we scope a single foot of duct, Lead Technician Jacob documents the crawl space on video — the sweating ducts, the wet barrier, and the state of the subfloor — so you can see the problem with your own eyes and know exactly what you're paying to fix.
Book Your Free Crawl Space Assessment
Fill out the form below or call (757) 502-0200.
Clean, Seal, Then Dry the Space Out
Tackling only one of these leaves the other two to bring the problem right back. We do all three as one job.
1. HEPA Duct Extraction
We clean the flex ducts with HEPA-filtered extraction, pulling out the moisture-fed grime and any mold growth that has taken hold on and inside the runs.
2. Mastic Sealing
We seal the duct joints and connections with mastic so conditioned air stays inside the duct instead of leaking out and chilling the outer surface into a condensation magnet.
3. Crawl Space Humidity Control
We bring the moisture in the space under control — vapor barrier, sealing, and humidity management — so warm, damp air stops hitting the ducts and re-starting the cycle.
Everything This Solution Draws On
Drying out sweating ducts spans both our duct and moisture teams. Explore the pieces, or let us fold them into one scoped quote.
Duct Cleaning
HEPA extraction and cleaning of the flex ducts, plus the mastic sealing that stops the outer surface from sweating.
Learn moreCrawl Space Inspection
Lead Technician Jacob's video-documented look under the house to grade the moisture and the ductwork.
Learn moreCrawl Space Encapsulation
Sealing the space and controlling humidity so warm, damp air stops condensing on the cold ducts.
Learn moreWood Fungus Treatment
Treating any rot fungus the constant dampness has started on the subfloor and framing above.
Learn moreSump Pump Installation
When standing water is part of the moisture problem, a sump pump keeps the crawl space floor dry.
Learn moreRequest a Free Quote
Tell us what's dripping under your house and we'll scope the clean, seal, and humidity fix.
Learn moreFrequently Asked Questions
Protect Your Whole Home
For One Monthly Price.
Sweating ducts touch two of our teams at once. Universal Duct Cleaning cleans and seals the runs while Universal Pest & Termite controls the crawl space moisture and treats any fungus — one local family of companies handling the airflow and the humidity together.
What Hampton Roads homeowners get:
Quarterly Pest Control
Year-round defense against ants, roaches, rodents, spiders & 20+ other invaders.
Attic & Crawlspace Care
Yearly inspections that protect the envelope keeping your home dry and sealed.
Air Duct & Dryer Vent Cleaning
Cleaner air and healthier airflow through every room of the house.
Membership plans
Billed monthly · cancel anytime · no long-term contract
Choose your plan — Essential, Pro or Elite — and save.
- Free emergency return visits
- Priority scheduling
- 4.8★ Google-rated local team
Stop the Drip Before Mold Sets In
Book a free, video-documented crawl space assessment. We'll show you exactly what's sweating, seal it, and get the humidity under control so it stays dry.
Ready to protect your home?
Call now or request a free quote online. Same-day service often available.
How We Compare to Other Pest Control Companies
Not every pest control company in Hampton Roads offers the same thing. Here is a straight comparison of what you get with Universal Pest Control and what is common elsewhere in the industry.
| What to compare | Universal Pest Control | Most pest control companies |
|---|---|---|
| UniGuard ProgramExclusive | Universal Pest Control Termite protection and full pest control combined in one membership for one low monthly payment — from $59/month, with the termite warranty and quarterly pest service included together. | Most pest control companies Termite protection and pest control are usually sold as two separate agreements, with two renewals and two bills to keep track of. |
| SmartPay financingExclusive | Universal Pest Control $0-down payment options on termite treatments, baiting systems, and repairs, so the work can start before payday. Simple, predictable monthly payments. | Most pest control companies Financing, where it is offered, is commonly arranged separately through a third-party lender. |
| Pest Guard Attic Insulation™Exclusive | Universal Pest Control Hampton Roads' only licensed Pest Guard Insulation™ installer, through our sister company Universal Insulation Doctor — insulation manufactured with an EPA-registered pest preventative, so the replacement itself resists the insects that ruined the original. | Most pest control companies Attic insulation is typically referred out, and standard fiberglass has no pest deterrent built into the material. |
| Total Home Health Network | Universal Pest Control Pest and termite control, attic insulation, and duct cleaning coordinated under one roof through the Universal family of companies — one point of contact for the whole job, done in the right order. | Most pest control companies Pest control only. Insulation and duct work are usually booked with separate vendors on separate timelines. |
| A+ BBB rating | Universal Pest Control BBB accredited since 2007 with an A+ rating, earned through consistent, honest work in the same community. | Most pest control companies Accreditation and ratings vary by company — worth checking before you book anyone. |
| 26+ years in business | Universal Pest Control Protecting Hampton Roads homes since 2000 — more than 26 years in the same market, with over 100,000+ homes serviced. | Most pest control companies Tenure in the area varies widely; newer branches and recently opened franchises are common. |
| Family owned & operated | Universal Pest Control Owned and run by a family that has lived in Hampton Roads their whole lives. The people who answer the phone and the crews at your door are your neighbors. | Most pest control companies Ownership varies — many local branches are franchises of national brands, with crews dispatched from outside the area. |
| Guarantees in writing | Universal Pest Control Pest-Free Guarantee and Termite-Free Guarantee: if pests come back between scheduled visits, so do we, at no extra charge. Free inspections, plus same-day and next-day service. | Most pest control companies Retreatment terms, callback windows, and what counts as covered differ from contract to contract. |
The highlighted Universal Pest & Termite column reflects services we provide directly or through the Universal family of companies. The “Most pest control companies” column describes common industry practice in general terms and is not a statement about any particular company — some companies may offer services that are similar, so ask any provider exactly what their plan, warranty, and quote include before you sign. Financing on approved credit.