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Mold Testing & Sampling · Accredited Third-Party Lab

Mold testing, carried out as part of an assessment

Air and surface sampling analyzed by an accredited third-party laboratory, with the licensed assessor deciding on the day whether any testing is needed.

How testing is decided

The assessor decides whether sampling is needed

Sampling is one part of an assessment, not a product sold on its own. On site, the licensed assessor determines whether samples would establish something the inspection cannot, and which samples suit the situation. These are the circumstances where sampling most often applies.

A medically sensitive household

Where someone is being treated, the species and levels matter to the practitioner. As a MedVendor CIRSx Verified Provider, Celtic documents results in a form your doctor can work from.

Comparing indoor air against outdoor

Indoor spore levels measured against the outdoor air on the same day. That comparison is what establishes whether the building itself is contributing.

Growth beyond what is visible

Where there is reason to think growth has moved into a wall cavity or the HVAC system, sampling helps establish the extent.

Documentation for a third party

Where a written record is going to be relied on by an insurer or an attorney, laboratory results form part of it.

Every sample goes to an accredited third-party laboratory. Celtic does not operate its own laboratory. Results are produced independently, and the assessor interprets them against what was found on site rather than in isolation. If you have already had sampling done elsewhere and want a second opinion on the results, send the report over.Send us a report to review

What it costs

Sampling sits inside an assessment

Each on-site assessment allows for testing, and whether any samples are taken is the assessor's call on the day. Additional samples are available where the assessor determines they are needed.

Virtual Visual Consultation

Starting at $249. A licensed assessor reviews what you are seeing on a video call. This level does not include samples or testing of any kind.

See what is included

On-Site, Single Location

Starting at $749. Includes up to two tests, air or surface, where the assessor determines they are needed, along with a written report and a 2D floor plan of the findings.

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On-Site, Full Home

Starting at $997. Includes up to two tests where the assessor determines they are needed, plus thermal imaging and whole-house coverage. Built for health-impacted households.

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Additional testing

Extra air or surface samples beyond the two included, typically $150 to $200 each. ERMI and mycotoxin panels are available where a practitioner has requested them.

Ask about add-ons

If results come back clean and you would like the property documented year after year, the NEST Protection Plan is the natural next step. It provides an annual professional assessment, ongoing documentation and priority scheduling.

Explore NEST Protection

Straight answers

Questions about testing

Can I just buy a test without an inspection?

Celtic does not sell samples on their own. A laboratory result cannot be interpreted without the context of the building it came from, so sampling is carried out as part of an assessment. New York State separates assessment from remediation for a related reason, which is that the party testing should not be the party selling the cleanup.

Are the home test kits sold at hardware stores any good?

Home test kits have real limits. Spores are present in every building, so a kit will almost always show something growing, and that result on its own does not tell you whether the level in your home is elevated, where any moisture is coming from, or what should be done about it. Those are the questions an assessment answers.

What is ERMI, and do I need it?

ERMI is a DNA-based index of mold species found in settled dust, and it is the test most often requested by physicians treating CIRS. You would need it if your practitioner has asked for it. Otherwise the assessor will tell you whether it adds anything in your situation.

How long do results take?

Results usually take a few business days, which is the laboratory turnaround. If the timing matters for a closing or an insurance claim, mention that when you book and we will tell you what is realistic.

What happens if the results come back clean?

If the results come back clean, you have independent documentation saying so, produced by a firm with no cleanup to sell you. That is a legitimate and fairly common outcome.

Independent answers about your home. Start today.

Open Everyday: 7:00 AM - 5:00 PM · Serving the Hudson Valley and Capital District.

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