Mold Inspection and Testing in Sioux Falls

A musty smell that shows up after a slow plumbing leak, a ring of discoloration on drywall that keeps coming back after you wipe it down, or a home inspection report that flags “possible moisture intrusion” before closing: these are the moments that call for mold inspection and testing, not a guess. Sioux Falls homes built on basements and slab foundations trap humidity differently depending on age and construction, and a visual check alone often misses what’s happening inside a wall cavity or under subflooring. Testing gives you a documented answer instead of a hunch.

What Mold Inspection and Testing actually involves

A proper inspection starts with a walkthrough of the property looking for visible growth, water stains, warped materials, and areas where humidity tends to collect: bathrooms, basements, crawlspaces, and around HVAC returns. Moisture meters and, when useful, thermal imaging help locate damp material behind finished surfaces without cutting into drywall unnecessarily. From there, air sampling (using a spore trap device that pulls a measured volume of air through a collection cassette) and surface sampling (tape lifts or swabs from suspect areas) are used to identify what’s actually present and at what concentration. Samples go to an independent lab, and results typically come back within a few business days, giving you a written report you can act on, share with an insurance adjuster, or hand to a real estate agent.

Our process

1. Visual assessment and moisture mapping. We walk the property, note conditions, and use moisture meters to find damp materials that aren’t yet visibly discolored.
2. Air sampling with an outdoor control. Indoor air samples are compared against an outdoor baseline sample, since spore counts naturally vary by season and this comparison is what makes indoor results meaningful.
3. Surface sampling on suspect growth. Tape lifts or swabs are taken directly from stains or discoloration to identify the specific mold genus present.
4. Lab analysis and report. Samples are sent to an independent laboratory, and results are compiled into a written report with sample locations, spore counts, and species identified.
5. Recommendations. If elevated levels or active growth are confirmed, the report outlines what area needs remediation and whether IICRC S520 containment protocols apply to the scope.

What separates a good mold inspection response from a bad one

The most common shortcut is sampling only where mold is already visible and skipping the outdoor control sample, which makes it impossible to tell whether indoor spore counts are actually elevated or just typical for the season. Another frequent miss is stopping at the surface: moisture behind a baseboard or inside a wall cavity near a plumbing chase can sit undetected for months if nobody checks with a moisture meter or borescope. A thorough inspection also looks at the HVAC system, since a return duct pulling air from a damp crawlspace can spread spores throughout a home even when no growth is visible in living areas. Insurance adjusters reviewing a claim want to see the moisture source identified, not just the mold, because covered water damage claims hinge on how the moisture got there and how quickly it was addressed.

What does Mold Inspection and Testing cost?

Costs vary based on the number of samples taken, the size of the property, and whether air sampling, surface sampling, or both are needed. Every property and situation is different, and Crew Restoration & Construction provides a written scope of the inspection and testing before any work begins. Homeowners insurance typically covers mold testing when it’s tied to a covered water loss, but it usually does not cover testing done for general curiosity or pre-purchase due diligence.

Seasonal & regional considerations

Sioux Falls summers bring stretches of high humidity that push basements and crawlspaces above the moisture threshold mold needs to establish, usually within 24 to 48 hours on porous material. Spring snowmelt and heavy rain can overwhelm sump pumps in older neighborhoods with clay tile drainage, and a basement that stayed dry all winter can develop a hidden moisture problem within a week of a wet spring. Homes with finished basements are particularly worth testing after any water intrusion, since carpet padding and drywall track can hold moisture long after the surface looks dry.

Service area

Crew Restoration & Construction provides mold inspection and testing throughout Sioux Falls and surrounding communities across southeastern South Dakota, including areas with a mix of older basement construction and newer slab-on-grade homes.

If you’re noticing a musty smell, unexplained allergy symptoms at home, or discoloration that keeps returning, request an air quality test and get a documented answer before deciding on next steps. Call (605) 965-2727 to schedule an inspection.