Document what you're seeing
Note where it is, when it appeared, whether it tracks with weather, how it's changed, and any past work in that area. A few photos and rough measurements make the first call more useful.
Read the local context
Sterling Heights was built out almost entirely in a single postwar wave -- 1950s through 1970s subdivisions housing Chrysler and Ford workers -- so crawl spaces and basements across the city share the same construction-era vapor barriers and ventilation choices. A humid continental climate, with real summer humidity and roughly 46 inches of snow a year, keeps moisture pressure on those spaces year-round.
Plan for what gets covered back up
The mold itself is only the visible part -- water entry, humidity, material condition, containment, and a final check all belong in a real plan. Ask the provider to explain what prep and verification happens before it's sealed back up.
Compare full scopes, not summaries
Look at protection measures, access, materials, permits, testing, cleanup, restoration, exclusions, warranty terms, and how change orders are handled.
What official local sources add
Sterling Heights enforces its own Stormwater Management Standards, effective May 17, 2023, and requires a floodplain development permit for work within mapped flood hazard areas -- both relevant to moisture and drainage conditions around a home's foundation.
Sources were reviewed 2026-07-26. Confirm parcel-specific flood zones, historic-district status, permits, and current requirements with the relevant authority before authorizing work.