“Black mold” is a phrase, not a species. It usually refers to Stachybotrys chartarum — the toxigenic species behind the alarming health stories. The complication is that several common, less-toxic dark molds look identical to the eye, and we’ve seen Raleigh homeowners panic over Cladosporium and pay for full Stachybotrys-tier remediation that wasn’t warranted.
The honest workflow is identification first. Samples go to a third-party microbiology lab. The scope is built around what’s actually present, not the colloquial label.
When the result confirms Stachybotrys, the remediation protocol is strict: full PPE, sealed containment, HEPA filtration, removal of porous substrate, and repair of the underlying moisture event. The species can’t recolonize a dry substrate, so closing the moisture source is the long-term insurance.
Stachybotrys work has its own dynamics, and homeowners deserve a clear read on them before the project starts.
We've sent hundreds of 'classic black mold' samples to the lab over the years. A meaningful share come back as Cladosporium, Aspergillus niger, or other dark species — not Stachybotrys. The work and the price for actual Stachybotrys is different; lab work pays for itself by getting the scope right.
Stachybotrys produces trichothecene mycotoxins that don't break down with bleach or wiping. Disturbing a colony without proper containment, negative pressure, and full-face respiration sends spores and toxin-bearing fragments into the rest of the home — and the lungs of anyone in it.
Surface treatments don't reach the hyphae embedded in porous substrate. Paint locks in some of the visual but does nothing to the colony. Within a season the growth is back, and the moisture source — which was never addressed — is still there.
Same IICRC S520 protocol used for all mold species, applied with stricter PPE and containment when the lab confirms Stachybotrys.
Air or surface samples to a third-party microbiology lab. Species and counts come back before we quote remediation. If the species isn't toxigenic, the scope is priced accordingly.
6-mil poly containment, negative pressure with HEPA exhaust, full-face respirators, disposable suits. The IICRC S520 protocol applied with no shortcuts.
Affected porous materials are bagged for disposal. Surviving structure is HEPA-vacuumed and treated with EPA-registered antimicrobials. Air scrubbers run continuously throughout the project.
Roof leak, plumbing, drainage, vapor intrusion — whatever produced the persistent moisture is fixed in the same project. Stachybotrys cannot recolonize a dry substrate.
Real reviews from homeowners and contractors across North Carolina.
“We bought a new to us 1964 home last December and to no surprise, we had asbestos popcorn ceilings. We decided to remove the ceilings altogether versus just scraping them. To complicate things even more, we had a plumbing leak in a room that had previously been encapsulated, so we had to deal with insurance to cover a portion of the asbestos removal. Rusty and the whole team at Remtech were such a help from the first moment we spoke! They were responsive, flexible, and knowledgeable. They helped us get insurance what they needed. They even worked with us to do the removal work while we had to be out of town. Asbestos removal and dealing with insurance, especially as we were brand new to the home, was incredibly stressful. Working with Remtech was the opposite – they were helpful and easy to work with that I barely had to think about the work being done. It was a nice break for my brain! They also did a great job. We came home to a CLEAN house with no ceilings! While I’m hoping we never have to go through such a big project again, I know we’d be able to handle it because we can rely on Remtech.”
“Very fast, professional and responsive. Did floor asbestos abatement for our house for a very reasonable price and they were very quick to schedule to keep us within our very close timeline.”
“As a General Contractor specializing in Bathroom & Kitchen remodel, we complete in excess of 250 bathroom upgrades each year. Regardless of our remodeling and construction experience and capabilities, when it comes to addressing the unforeseen hazardous and environmental conditions posed by mold, asbestos, and lead paints, we have a responsibility to our customers to partner with the best abatement specialist possible, and as proficient in abatement as we are kitchen and bath remodeling. Remtech has proven to be that reliable and trusted partner for both our customers and company. We highly recommend the Remtech Team.”
“A few months ago I used Remtech Envir. to remove asbestos from the ceiling of my home, and to this day I’m still amazed with their service that I’ve been meaning to write a review, and today’s the day! The whole process went through so smoothly because of their professionalism, punctuality and care. At the end of each day I received an update from Rusty who was the project manager which was super helpful, and because of their expertise I knew the job was getting done correctly. There was a lot of asbestos to remove, and they showed up and delivered hard work to get it done within the time frame that was initially discussed. So grateful we used their services! I would highly recommend!”
“Our church basement flooded and the old asbestos tiles curled up and had to be removed. Jeff Brewer came over to look at our problem, explained what they would do. He furnished a quote very quickly with a fair price. After checking with two other companies, Jeff’s instructive conversation, ease of manner, willingness to help and a fair price won him the work. As a former contractor, I know how backed up companies can be in their schedule. He told us of a target time about 4-6 weeks off, which was fine. He called a couple of weeks later and had an opening in his schedule and wanted to come earlier. That was great. Their staff arrived on time and delivered a very quick, professional and clean project. This allowed us to get our Fellowship Hall floored and back in operating condition prior to the start of the school year. It is a pleasure to work with a company that communicates well and delivers their service in a superior way.”
“I have spoken with Bryan on many occasions about growth strategy. He has always been open to communicate. I look forward to future conversations.”
“Remtech came in and did a removal of asbestos when our home developed a leak and the sheetrock ceiling had to be removed. Got right to work, kept us informed every step of the way and did a great job of cleaning up. Would use them again in a heart beat!!”
“The cost was higher than expected, so I did not move forward at that time. I will use Remtech when I am ready to have the work done. They are very professional and take the time to answer any questions. The rep arrived on time, explained the process and provided the estimate. A very positive experience.”
A wet substrate that grows Stachybotrys typically grows three or four other species alongside it. Our scope addresses the whole microbial picture — and the moisture event that produced it.
Five questions that come up on every Stachybotrys consult. The longer answers happen on a walkthrough, in the room.
No. 'Black mold' is colloquial; it usually refers to Stachybotrys chartarum, which is toxigenic, but several other dark molds — Cladosporium, certain Aspergillus species — look the same and are far less concerning. Lab testing is the only reliable way to tell. Any mold growth in a home is worth addressing, but the scope and price differ depending on species.
Stachybotrys chartarum is a greenish-black mold that grows almost exclusively on cellulose materials — drywall paper, ceiling tile, paper-faced insulation — that have been wet for at least seven to ten consecutive days. It produces trichothecene mycotoxins, which is what drives the health concern. Its strict moisture requirement is why finding it always points to an active or recently-active leak.
We don't recommend hardware-store kits. Petri-dish settle plates can't reliably distinguish species, don't quantify counts, and aren't accepted by insurers or industrial hygienists. If you want a defensible answer, samples need to go to an accredited microbiology lab. We collect and submit them for you and the report is yours to keep.
Same rules as any mold claim in NC. Sudden, accidental, covered water events — burst pipe, appliance failure, storm-driven roof leak — usually qualify, with a mold sub-limit between $5,000 and $10,000 on most policies. Long-term seepage, deferred maintenance, and chronic humidity are typically excluded. We document the moisture source thoroughly so the claim is defensible.
Vacate the affected area until containment is built and remediation is complete. Children, immunocompromised adults, asthmatics, and pets with respiratory sensitivities show symptoms earlier and more severely. If the affected area is a bedroom or main living space, plan for relocation during the project — usually three to seven days.
We’ll come look, sample if warranted, and price the work only after the lab confirms the species. No upsell on a colony that turned out to be harmless.
A clear photo of what you’re seeing tells us whether testing is even warranted. We’d rather save you a sample fee than collect one that wasn’t needed.