Service
Wall Cavity Mold Inspection & Testing
After a leak inside a wall, mold can grow on the back of drywall where no one sees it. Wall cavity sampling uses a small access point to sample the air inside the wall, giving evidence without opening the whole wall.
This page describes wall cavity mold inspection & testing at our main San Diego location, Pro Plus Mold Inspection. Call (619) 935-5995 to schedule.
When it's useful
- Known leaks inside walls
- Moisture readings that stay high
- Musty smell near a wall
What we do
- 1Moisture and thermal checks to pick locations
- 2Small access point for sampling
- 3Laboratory analysis
Inspection scope
- A visual check of the area being tested, so samples are taken in the right places
- Moisture readings around the area being sampled
- Sample locations chosen around your concern, plus an outdoor reference for air samples
Sampling options
- Air sampling: outdoor comparison samples may inform interpretation as appropriate to the sampling plan, alongside site observations.
- Surface sampling: swab or tape-lift samples characterize material collected at a specified surface; outdoor air comparisons do not apply.
- Samples are sent to a laboratory for analysis.
What you receive
- A walkthrough of what we found while we're on site, when you're available
- A written summary of observations, moisture readings, and likely moisture sources
- Laboratory results, if samples were taken
- Plain-language next steps, including when no further action is needed
Limitations
- We inspect accessible areas only. We don't open walls, move heavy furniture, or remove finishes unless agreed in advance.
- Thermal imaging shows temperature differences, not mold. Readings are confirmed with a moisture meter.
- Sampling results are limited to the method, time and location sampled; they cannot establish whole-building safety or the absence of hidden mold.
- Inspection and testing cannot diagnose illness, determine the cause of symptoms, or rule out a medical condition. Direct health questions to qualified medical professionals.
- There are no EPA or federal airborne mold limits. Sampling cannot establish compliance with federal mold standards or guarantee health safety.
- Findings reflect accessible areas and conditions during the visit; they cannot guarantee that all hidden mold is found or that future conditions remain unchanged.
Wall Cavity Mold Inspection & Testing questions
What do air sample results tell me?
They show whether the types and amounts of spores indoors look unusual compared with outdoor air at the same time. They don't pinpoint where growth is. That's what the inspection is for.
Can testing tell me if mold is “safe”?
No. There are no universal safe limits for mold spores. Air samples may use outdoor comparisons as appropriate to the sampling plan alongside site observations; surface samples characterize the collected material. Results are method, time and location limited and cannot establish whole-building safety or the absence of hidden mold.
Related services
Moisture Detection & Moisture Mapping
Find and map hidden moisture in walls, floors, and ceilings — the conditions mold needs to grow.
Learn moreWater Damage Mold Inspection
After a leak or flood, find out how far the water went and whether mold has started to grow.
Learn moreHidden Mold & Musty Odor Investigation
Track down the source of a musty smell — behind walls, under floors, in cabinets, attics, or crawl spaces.
Learn moreOther Pro Plus locations
This service is listed for our San Diego location. Availability at other Pro Plus Mold Inspection locations isn't confirmed. Call the location you need, or see the location directory.
Book wall cavity mold inspection & testing in San Diego
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