09/16/2026
Wednesday Wisdom:
Should You Clean or Change the Home Before an Investigation?
Generally, no.
If the purpose of the assessment is to understand what caused the problem, the investigative team needs to evaluate the home as close to its original condition as possible.
The building enclosure, HVAC system, moisture conditions, air movement, and pressure relationships all influence one another. Cleaning or making repairs before testing can change those relationships and remove important evidence.
Before the investigation, avoid:
Cleaning or removing visible microbial growth
Removing drywall, flooring, or insulation
Painting or sealing stained surfaces
Fogging or applying antimicrobial products
Installing new vents or modifying ventilation
Changing ductwork or normal HVAC operation
Discarding affected materials without documentation
For example, installing new vents can change airflow, pressure, humidity, and moisture movement. Cleaning can remove visible indicators that help identify where the condition started and how it spread.
The home can still be assessed after changes are made. However, the report will reflect the modified conditions. It may be harder to connect the original problem to its contributing mechanisms with the same level of confidence.
What should you do while waiting?
Stop active water intrusion immediately.
Dry actively wet materials as quickly as possible.
Keep indoor humidity below 60%, with a target near 50% when practical.
Avoid disturbing visible or suspected microbial growth.
Photograph and video each affected area before making changes.
Record dates, locations, odors, staining, leaks, and humidity readings.
Document every change made to the HVAC or ventilation system.
Keep children and sensitive or immunocompromised occupants away from affected areas.
Notify the investigative team if conditions worsen or emergency work becomes necessary.
Do not allow an active leak or wet materials to remain untreated simply to preserve the original conditions.
The priority is:
Document. Stop the moisture. Stabilize the home. Investigate. Correct. Verify.
A clean surface may look better, but identifying and correcting the mechanism is what helps prevent the condition from returning.
Call Airelytics at 337-366-7684.
Stop guessing and start testing.
