- Visual signs: stains, efflorescence, blistering paint, soft or spongy materials, mold/mildew odors.
- Non-invasive scans: infrared/thermal imaging to spot temperature anomalies that often indicate moisture behind surfaces.
- Moisture meters: pinless (surface/near-surface) and pin-type (penetrating) meters for numeric readings at specific points.
- Relative humidity & dew point: hygrometers or data loggers for enclosed cavities/assemblies to assess drying conditions and mold risk.
- Moisture mapping: a grid or “heat map” of readings across the area so trends and severity are clear.
- Targeted invasive checks (when needed): small probe holes, cavity probes, borescope inspection, or controlled water tests to confirm an entry point.
- Drainage/site review: gutters, downspouts, grading and roof flashings that could cause intrusion.
What the readings tell you
- Readings show where moisture is concentrated and whether it’s rising, stable, or drying.
- Instruments give repeatable numbers so you can track progress during drying or after repairs.
- The combination of thermal imaging + meter readings + visual evidence is what lets an inspector locate the source (not just the symptom).
Typical deliverables you should expect
- Time-stamped photos and notes.
- A moisture map or table of measurement points and values.
- A clear statement about likely source(s) / intrusion path.
- Recommended next steps (drying, repairs, invasive investigation) and urgency.
- Copies of raw data (meter readings / logger outputs) on request.
Questions to ask before hiring / when the inspector arrives
- What kinds of moisture instruments do you use (thermal camera, pinless meter, pin meter, hygrometer)?
- Do you perform moisture mapping and provide raw readings?
- Will you do water testing or invasive probes if the source isn’t obvious? (ask about fees)
- Are you certified or experienced with building-envelope diagnostics / forensic water intrusion?
- What will the final report include and how soon will I get it?
What to do if moisture is found
- Get the report and follow recommended mitigation quickly (drying, containment) — document everything and keep receipts.
- Use the moisture map / report to direct repairs rather than guessing.
- If responsibility is unclear, the written diagnostic report is your best evidence for insurance, HOA, or legal steps.
If you want, I can:
- Draft a short “what to ask an inspector” checklist you can use on site, or
- Write a one-page email template to request a moisture inspection from a contractor/inspector.
Which one should I make for you?