A standard home inspection is a generalist’s review of the whole property. It is valuable, and it is not a mold inspection. Most general inspectors will note visible growth and visible water staining — they typically do not perform moisture mapping behind finished surfaces, and they do not collect laboratory samples.
If a house has a musty basement, a finished lower level, or any history of water, that gap is worth closing before you own it.
Why This Matters More During a Purchase
Once you close, the problem is entirely yours. Before you close, it is a negotiating position.
Michigan is largely a caveat emptor state for real estate. Sellers must complete a Seller’s Disclosure Statement, but that covers what they actually know. A previous owner who finished a basement over a damp foundation, or who cleaned visible mold without addressing the source, may disclose nothing — not out of dishonesty, but because they genuinely considered it handled.
An inspection contingency period is the one window where a documented finding still has leverage attached to it.
Properties Worth Testing
Not every purchase needs this. These do:
- Any musty smell, even faint, even in one room.
- A finished basement — especially one finished by an owner rather than a contractor, and most especially without a permit.
- Visible staining on ceilings, walls, or the foundation.
- Vacant or bank-owned properties, where heat and dehumidification may have been off for a season.
- A property with known water history — flooding, sump failure, roof leak, burst pipe.
- Fresh paint in the basement only. Sometimes it is presentation. Sometimes it is a cover.
- Crawlspaces, particularly with exposed soil or no vapor barrier.
- Older homes with original drainage, grading, or roofing.
- Anyone in your household with asthma, allergies, or immune compromise — see health effects.
What Michigan Housing Stock Tends to Hide
Regional patterns worth knowing as a buyer here.
Finished basements are the recurring one. They are extremely common in this market and they conceal exactly the surfaces where our climate causes problems — below-grade walls that condense in summer, rim joists, and the base of foundation walls where spring melt pushes moisture through. A carpeted, drywalled basement can look immaculate over a wall that has been damp for years.
Attics tell you about ventilation. Bath fans discharging into the attic instead of outdoors are common enough that we check every time, and the resulting sheathing mold is invisible from every room in the house.
Ice damming leaves its evidence at the top of exterior walls and the ceiling perimeter — often visible only in the months it occurs.
What We Do
- Full visual assessment, with attention to the areas above.
- Moisture mapping and thermal imaging to find wet material behind finishes — the part a general inspection usually does not include.
- Air and surface sampling where warranted, with an outdoor control, analyzed by an accredited lab.
- A written report identifying findings, the probable water source, and the remediation scope if any is needed.
Turnaround is built around contingency deadlines. Lab results typically return in one to two business days with the report following within 24 hours, and expedited processing is available when a closing date requires it.
Using the Report in Your Negotiation
A finding is not automatically a reason to walk. It is information, and it usually produces one of four outcomes:
- Seller remediates before closing, with your right to independent clearance testing afterward — worth insisting on, since otherwise the contractor the seller hired is the only one confirming the work.
- Price reduction reflecting the documented scope.
- Credit at closing so you control the contractor and the quality.
- You walk, having spent a few hundred dollars instead of inheriting a structural moisture problem.
Because we do not perform remediation, our report is not a quote for our own work — which is precisely why it holds up in a negotiation. A seller’s agent can dismiss a cleanup company’s alarming assessment as self-interested. An independent scope is harder to argue with.
A Note on Timing
Schedule during your inspection contingency, ideally alongside or immediately after the general home inspection so the general inspector’s findings can direct where we look. If the general inspector flags moisture, that is the moment to bring in a specialist — not after closing, when the discovery costs you rather than the seller.