Small Particle Cleaning (SPC) Remediation

For most people, standard mold remediation is enough to make a home safe to live in again. But if you have CIRS or a heightened sensitivity to mold, even the trace spores and particles left behind can still trigger symptoms. For those cases, Claro offers Small Particle Cleaning, which goes further by clearing microscopic mold debris from the air and every surface.
4.9
(30 reviews)

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What Is Small Particle Cleaning?

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After mold remediation, the source is gone and spore counts are reduced by up to 99%. For most people, that's the end of it. But even a thorough remediation can leave behind traces too small to see: spores as small as 2 to 10 microns, fragments of hyphae (the thread-like structures mold grows from), and mycotoxins that attach to dust.

These particles can stay suspended in the air or settle into carpets, vents, and soft surfaces, and for someone with CIRS or a heightened sensitivity to mold, even that small amount can be enough to keep symptoms going.

Small Particle Cleaning removes that residual material using HEPA filtration built to capture particles at this scale, well beyond what a standard vacuum or air filter can trap. It happens after remediation is complete, as a final pass to clear what's left from the air and surfaces. For most homeowners it's a layer of added assurance that might not be required, but for people with CIRS (Chronic Inflammatory Response Syndrome) or heightened mold sensitivity, it's often necessary, since trace levels that wouldn't affect most people can still trigger symptoms.

We don't usually recommend it to most of our clients, since it's a thorough, time-intensive process that adds to the cost, but for the people who genuinely need it, it can make all the difference.

Why Small Particle Cleaning Goes Further Than a Deep Clean

Regular cleaning is built to make a room look and feel clean. The catch is that a lot of what it does moves fine particles around instead of getting rid of them. Dusting lifts settled material back into the air. A standard vacuum pushes some of it straight through the filter and out the exhaust. In a home that's just been treated, that motion can work against you, stirring up the exact spores and fragments you wanted gone and giving them somewhere new to land.

Small Particle Cleaning works toward the opposite goal: pulling particles out of the space and keeping them out. That changes how the job is done. Airflow gets managed so nothing recirculates, rooms are worked in a set order so a finished area doesn't get recontaminated, and the spots a routine clean tends to pass over get direct attention, like return vents, register covers, upholstery, closet shelving, and the tops of trim and door frames where fine dust gathers without anyone noticing.

The biggest difference is how each one defines "finished." A deep clean is done when the surfaces look right. Small Particle Cleaning is done when the space meets a set standard for what's left behind, which is the part that matters most to someone whose symptoms follow particle levels they can't see.

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1,000s now living or working mold-free

After testing positive for mold in my body, another company told me there was no issue — but Claro's inspection found mold in my decorative pillows and under my sinks that a standard air test completely missed. After a full home sanitization, our whole family was breathing better than we had in 8 years. Can't recommend them enough!

Kelli B

Nashville, TN
I had a great experience with Claro St. Louis. Their team was professional, thorough, and explained everything clearly. I’m really grateful for the quality of their work and highly recommend them to anyone dealing with mold issues!

Monica A

St. Louis, MO
We recently had Nick of Claro - Complete Mold Remediation consult us on our crawlspace and we were very impressed with his expertise. He conducted an air quality test of our house using brand new technology/equipment. He quickly put any concerns we had about mold issues to rest with these precise measurements. We would recommend him to anyone who is looking to understand how to make their home healthy and safe.

Joyce M

Murfreesboro, TN
Professional, courteous, patient, and thorough! During recent repairs, a serious mold infection was discovered.  My whole house was treated without the need to tear out walls just to find mold. The treatment even took care of any mold infection my HVAC system. I would not hesitate to recommend Claro to anyone. 10/10, no notes!

Lynch O

Franklin, TN
I used Claro for mold remediation 1 month ago. We found mold growing around a bathroom vent. We had them clean up the growth on the ceiling and perform a full house duct cleaning. I have a large house with alot of vents so the price was very fair! They were able to perform a large job in 2 days. Now, one month later and I must admit my "mild allergies" are gone, no scratchy throat. I am very impressed with this company and Nick's attention to us when we called upon them.

Ariana B

Antioch, TN
If you suspect you have a mold issue in your home give Claro a call. I couldn’t be happier with the service they provided 5 stars all the way!

Charles C

Nashville, TN
I highly recommend them!!! The quality of their work, the knowledgeable staff, the absolute dedication, and caring this company shows is impressive.

Lesa M

Belle Meade, TN
My husband and I were shocked to get a reading of mold during a home inspection. There was no visual mold or water in our home, but we wanted our home to be mold-free.
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Sharon H

Franklin, TN
I’m sitting comfortably in my home right now typing this review, grateful to God and to the Claro team.

John B

Nashville, TN
Hire them! These guys are not just concerned with taking the job and making a buck- they truly care about quality of life and the health and well-being of their clients.

Brandon N

Green Hills, TN
The process was fast, cost-effective, and worked better than anything we had tried before. Unlike other methods that just clean the surface, this keeps [mold] from coming back.

Pamela S

Nashville, TN
The first of its kind here in town. So great to have a safe mold remediation option in STL. There is nothing better you can do for the health of your family than making sure your house is mold-free! They offer mold inspections and make it easy.

Margaret H

Brentwood, MO
Great customer care and service, when you call this company, you will be speaking to the owner. in today's world where there is no customer care any longer these guys rank a 10 out of 10. I cannot say enough about them. Highly recommended.

Bryan G

Franklin, TN
After the treatment, our family’s mold-related illnesses got better and air quality tests came back great!

Thomas D

Nashville, TN