Mold in Air Ducts in San Antonio, TX: Real Remediation, Not Just Spray

Mold in your air ducts is not something a $150 "sanitization spray" fixes. In San Antonio, heavy oak pollen and long cooling seasons create ideal conditions for mold growth on cold evaporator coils, wet drain pans, and the interior of insulated duct board — and once it's there, only real remediation gets it out.

Why San Antonio homes are prone

• Cold coils + humid Texas air = constant condensation
• Long AC runtime in South Texas means constant moisture
• Attic air handlers trap moisture with poor ventilation
• Fiberglass duct board and duct liner (very common in San Antonio) absorb and hold moisture

What real remediation looks like

Real duct mold remediation requires:

1. Air sample lab test to confirm species and spore count
2. Full containment of the work area with negative-air machines
3. Source removal — physical cleaning with agitation, not just spray
4. EPA-registered antimicrobial applied after cleaning, not instead of
5. Liner or duct board replacement if the material is unsalvageable
6. Post-remediation clearance test with a second air sample

If a company skips the pre- and post-test, they're guessing. Walk away.

San Antonio pricing (real numbers)

• Confirmed light mold, single system: $700–$1,400
• Moderate mold with liner replacement: $1,500–$3,500
• Full whole-system remediation with clearance testing: $2,500–$6,000

What NOT to buy

• "Fogging only" packages under $300 — useless without source removal
• UV lights sold as "mold prevention" without addressing the moisture source
• Anyone who won't do a written air sample test before quoting

Related work

Once mold is out, most San Antonio homes also benefit from full air duct cleaning and AC coil cleaning to remove the debris the mold fed on. See our San Antonio location page for dispatch.