Leak guide › Mold after a leak
Did the remediation work? What a proper finish looks like
The EPA's finish line is plain: the moisture problem is fixed, no visible mold or mold damaged material, no moldy odor, and no signs of water damage or new growth on a return visit. Check those before final payment.
What is probably happening
- A proper job looked like this: source fixed, area contained in polyethylene sheeting under negative pressure, moldy porous material removed and bagged, hard surfaces cleaned, everything HEPA vacuumed, then verified.
- If the crew worked with no sheeting, no negative air machine and no HEPA vacuum on a job over about 10 square feet, the house may now have spores it did not have before.
- Verification by the remediator's own company is a receipt, not a verification.
Do this in the next five minutes
- Walk the area with a flashlight before the containment comes down. Look for staining, fuzz, or wet material left in place.
- Smell it. A moldy odor after remediation means something was missed.
- Ask for the moisture readings on the materials left in place, in writing.
- In Texas, ask for the Certificate of Mold Damage Remediation. The post remediation assessment must be by a consultant who did not write the protocol.
- Hold final payment until the written verification is in your hand.
Do not
- Do not accept an air test as the only proof. The EPA says surface sampling can help verify a cleaned area, but there is no airborne standard to pass.
- Do not accept 'encapsulated' as removed. The EPA guide's completion criteria say mold damaged materials should not be present.
- Do not let them take the containment down before you have looked inside it.
Who to call
An independent mold assessor for the verification
The assessor who wrote the scope, or a third party, confirms the scope was met. The remediator grading its own work is the conflict the state laws were written to stop.
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What it should cost
$303 to $1,045
Mold inspection, national average $671. Homes under 4,000 sq ft typically $300 to $400
Source: Angi, mold inspection cost, July 2026. View source
National published range, not a quote for your job. The full cost table for this trade is on the mold after a leak page.
Ask this contractor, on the phone, before anyone comes out
Tap each one as you ask it.
- Is the moisture source fixed, and can I see the reading that proves the material is dry?
- What was removed, what was cleaned, and where did the waste go?
- Was negative air run, and can I see a photo of the containment?
- Who signs the verification, and are they independent of the remediator?
- What is the warranty if it comes back, and what voids it?
End the call if
- No written verification at all.
- The remediator's own air test used as the clearance.
- Visible staining or a moldy smell left behind with 'it is dead, it is fine'. The EPA says dead mold still causes allergic reactions.