Mold Cause Inspection (Root-Cause Assessment)
A mold problem is rarely “just mold.” It’s usually the result of moisture + time + the right conditions. Our Mold Cause Inspection is a focused, non-invasive assessment designed to find where moisture is coming from, why it’s staying, and what conditions are allowing mold to return—so you can fix the cause, not just clean the surface.
What this service helps you answer
- Where is the moisture coming from? (leak, condensation, ground moisture, ventilation issues, roof/window intrusion, plumbing, etc.)
- Why is it not drying out? (hidden wet materials, trapped humidity, poor airflow, missing vapor control, incorrect exhaust setup)
- Is mold likely to return after cleaning? (if the source remains, it will)
- What should be repaired and in what order? (to avoid wasting money on repeat remediation)
What we inspect
- 1) Moisture & humidity conditionsIndoor humidity levels, temperature, and dew-point risk
- Signs of active vs. past moisture
- Areas where moisture can become trapped (tight wall cavities, insulated corners, behind cabinets)
- 2) Building envelope & water intrusion pathsExterior walls, windows/doors, siding transitions, penetrations
- Roof/attic indicators (staining, ventilation imbalance, bath fan terminations)
- Crawlspace/basement moisture migration and vapor issues
- 3) Plumbing & mechanical sourcesBathrooms, kitchens, laundry: common leak zones
- Tub/shower surrounds, toilet bases, supply lines, drains
- HVAC/duct condensation, improperly routed exhaust, insufficient makeup air
- 4) Ventilation & airflowBathroom fan performance and ducting route
- Venting to the exterior (not attic/crawlspace)
- Pressure/airflow problems that drive moist air into cavities
- 5) Visual mold mapping & risk areasIdentify visible growth and staining
- Likely hidden zones based on construction and moisture patterns
- Priority list of “most probable sources” based on evidence
Tools and methods we may use (non-destructive first)
Professional moisture meters (pinless and pin/probe where appropriate)
Thermal imaging to locate suspect damp areas and temperature-driven condensation zones
Humidity/temperature readings and targeted checks of known failure points
If needed, we can recommend targeted opening (small controlled access) only after identifying the best location—so you don’t open walls blindly.
Thermal imaging to locate suspect damp areas and temperature-driven condensation zones
Humidity/temperature readings and targeted checks of known failure points
If needed, we can recommend targeted opening (small controlled access) only after identifying the best location—so you don’t open walls blindly.
What you receive
A clear root-cause summary (what’s happening and why)
A map/list of affected and at-risk areas
Action plan with recommended fixes in the correct order:
A map/list of affected and at-risk areas
Action plan with recommended fixes in the correct order:
- stop the moisture source
- dry/ventilate correctly
- remove/clean affected materials (as needed)
- rebuild with proper moisture control
What this service is (and isn’t)
This is: a practical, contractor-minded assessment aimed at solving the cause and preventing recurrence.
Not automatically included: lab testing/air sampling (we can coordinate it if your situation requires documentation for a landlord, insurance, or medical sensitivity concerns).
Not automatically included: lab testing/air sampling (we can coordinate it if your situation requires documentation for a landlord, insurance, or medical sensitivity concerns).
When to book this inspection
- Mold keeps coming back after cleaning
- Musty odor, peeling paint, bubbling drywall, soft baseboards
- After a leak, flood, or chronic humidity
- Condensation problems (windows, corners, closets, bathrooms)
- Before you remodel a bathroom, basement, or crawlspace area with suspected moisture
EMAIL:
BUSINESS HOURS:
Mon–Fri: 9:00 AM – 6:00 PM
Sat–Sun: By appointment
Mon–Fri: 9:00 AM – 6:00 PM
Sat–Sun: By appointment
Redmond , WA
License Holder: Mikhail Makrushin
License Type: Construction Contractor (WA)
License number: #HMPROL*792CH
©2026, HM-Pro LLC. All Rights Reserved.
HM-PRO General Contractor
KING County, WA
Visible mold is a sign of a deeper issue — not the real problem.
If the source isn’t identified, the damage will continue to grow.
We help uncover the cause and define the proper repair.
If the source isn’t identified, the damage will continue to grow.
We help uncover the cause and define the proper repair.
PHONE:
© 2026 | HM-PRO LLC | Privacy Policy
Please, be informed, that the intellectual property rights to all the photos, designs and other materials on this Site belong to LLC HM-PRO. You may request permission to use them by contacting us at: 2065300019wa@gmail.com
Please, be informed, that the intellectual property rights to all the photos, designs and other materials on this Site belong to LLC HM-PRO. You may request permission to use them by contacting us at: 2065300019wa@gmail.com