Mold that is not black, or spread across several rooms? See our full mold remediation in Spanish Fork page: process, prices and the 90-day mold warranty.
Reviewed by Elena Ramirez, Mold Remediation & Drying Specialist, IICRC AMRT #327506, October 2026.
Short answer: “Black mold” is popular shorthand for Stachybotrys chartarum, but what people see as dark growth on drywall can be any of several species that look similar. 4Sure removes visible black mold in Spanish Fork and Utah County using the IICRC S520 standard: containment, full PPE, removal of contaminated materials, HEPA air scrubbing, antimicrobial treatment. Jobs typically start at $500. Led by IICRC AMRT-certified technicians Marcus Holloway (#263814) and Elena Ramirez (#327506).
What people mean by “black mold”
The phrase is a popular shorthand for Stachybotrys chartarum, one of several species that produces mycotoxins and is often cited in news stories about health effects of mold exposure. Stachybotrys is slimy and dark greenish-black when wet, and dry chalky black when old. It grows on cellulose-based materials — paper-faced drywall, cardboard, fiberboard, cellulose insulation — and it needs sustained moisture over days to weeks to colonize a surface. It does not grow on a wall that gets wet and dries out quickly.
But Stachybotrys is not the only dark-colored mold. Several other species look very similar on wet drywall, and visual identification alone cannot distinguish them:
- Aspergillus niger — black, often mistaken for Stachybotrys. More common than true Stachybotrys in Utah homes.
- Cladosporium — olive-green to black, the most common indoor mold in Utah.
- Alternaria — dark green to brown, common in showers and around windows.
- Chaetomium — starts white, turns grey, darkens to black over time. Common on wet drywall.
Confirmation of true Stachybotrys requires a lab test. The good news: for remediation purposes, it does not matter. The IICRC S520 standard calls for the same containment, removal, cleaning, and antimicrobial protocol regardless of species. See the 6 mold species we see most in Utah homes for more detail.
Our black mold removal process
- Inspection (from $99). Visual inspection, moisture mapping, thermal imaging to find the extent and the water source. Written scope and quote.
- Containment. 6-mil plastic sheeting with HEPA negative air machines creating a pressure differential inside the containment. This keeps spores from traveling to the rest of the house during the work. Standard practice on anything over 10 sq ft and almost always on jobs where the HVAC is involved.
- Full PPE. Our crew wears N95 or P100 respirators, full Tyvek body suits, nitrile gloves, and eye protection. Not for show — the work generates airborne spores and this is the standard required under IICRC S520 for Category 3 mold work.
- Removal of contaminated porous materials. Mold does not just sit on the surface of paper-faced drywall or fiberglass insulation — its roots (hyphae) grow into the material. You cannot clean it off. So we remove the drywall, insulation, carpet pad, and any other porous material that has been colonized. Bagged in heavy-duty poly, sealed, and disposed of as regulated waste.
- HEPA air scrubbing. Commercial-grade HEPA air scrubbers run throughout the work, filtering particles down to 0.3 microns. We leave them running during and after the removal until airborne particulate drops to baseline.
- HEPA vacuuming and antimicrobial treatment. Remaining hard surfaces — framing, concrete, metal — are HEPA vacuumed, then treated with an EPA-registered antimicrobial.
- Structural drying. If the underlying moisture source left anything wet, we dry it to IICRC standard using air movers and dehumidifiers before any rebuild.
- Clearance (recommended). On anything over about 100 sq ft, we recommend confirming clearance with air sampling and lab analysis before we rebuild.
- Reconstruction. New drywall, insulation, trim, flooring, paint — by the same crew, under our 24-month workmanship warranty. Mold warranty: 90 days from post-remediation clearance.
Health context (and what we do not claim)
Any mold exposure can cause respiratory irritation. Reactions vary dramatically by individual and by species. People with asthma, mold allergies, or compromised immune systems are at higher risk. Those are statements we are comfortable making because they are consistent with EPA and CDC guidance. We do not make clinical claims about specific health effects — that is a conversation for your doctor, not for a remediation company.
What we do: we contain the work so your household’s exposure during remediation stays as low as possible. We clean up afterwards so the home is safe to re-occupy. We recommend keeping vulnerable people out of the containment area during the work, even though the containment is sealed, because the risk-benefit for them does not justify being nearby.
Insurance for black mold in Utah
Standard Utah homeowners policies cover mold only when it results from a sudden, covered water loss — a burst pipe, failed water heater, or sewer backup if you have that endorsement — and only up to a mold sublimit, typically $5,000 to $10,000. Mold from long-term seepage, humidity, or deferred maintenance is usually not covered. Flood water from groundwater or rising rivers is excluded under standard policies — it needs a separate flood policy.
We review your coverage before quoting. If you have an active claim, we scope in Xactimate (the estimating software most carriers use) and bill the carrier directly. You pay the deductible plus anything your policy does not cover. For jobs that exceed the sublimit, we quote the remainder up front so you can decide whether to proceed. See how insurance billing works, what Utah policies actually cover for mold, and financing for your deductible.
What this costs
Jobs typically start at $500 for a small spot treatment on one wall or in one bathroom — something small enough to handle in a single containment with minimal material removal. Price scales with:
- Square footage of affected material
- Whether porous materials (drywall, insulation, carpet pad) need removal
- Whether HVAC is involved
- Whether independent clearance testing is required
- Reconstruction scope after remediation is done
After the assessment you get a free, firm written estimate before any work. No surprises mid-job.
Call (385) 247-9387. Free remediation estimate, 24/7 live-answered, 90-day mold warranty from post-remediation clearance.
Black mold: common questions
Is all black mold Stachybotrys?
No. Several species look dark on wet drywall — Cladosporium, Aspergillus niger, Alternaria. True Stachybotrys chartarum requires a lab test to confirm. The remediation process is similar for all of them.
Can I clean black mold myself with bleach?
Not on porous materials like drywall or wood. Bleach lightens the color but doesn’t penetrate porous surfaces, and the mold roots stay behind. It also releases spores into the air. For a surface under 10 sq ft on non-porous materials, EPA guidance allows DIY. Larger or porous? Hire remediation.
Do I need to leave my house during black mold removal?
Not usually. We build containment with plastic sheeting and negative air pressure, so the rest of the house stays sealed off from the work area. If the affected room is your only bathroom or bedroom, we work around it.
How long does black mold remediation take?
A single-wall or single-room job is 2–4 days with drying. Multi-room or HVAC involvement runs 1–2 weeks. The containment, HEPA scrubbing and drying all have minimum run times — rushing them is how mold comes back.
What does it cost?
Jobs typically start at $500 for a small spot treatment on one wall or in one bathroom. Larger areas, multi-room jobs, HVAC involvement and independent clearance testing increase the price. See our mold remediation page for pricing details and insurance info.
Not sure which species you have? See the 6 mold species we see most in Utah homes — where each one grows and why identification matters less than you’d think.
