What remediation means
Mold remediation is the controlled removal of mold-contaminated materials and the cleaning of surfaces that remain, combined with fixing the moisture problem that caused it. It is not the same as killing mold with a spray. Dead mold still contains allergens, and a surface that looks clean can have growth underneath. The goal is to physically remove the mold and the materials it has colonized, and to leave the space dry and clean.
Remediation follows a mold inspection. If you do not yet know how far the mold extends or what feeds it, start with mold inspection and assessment.
Why containment matters in mold remediation
Mold growth releases spores when disturbed. Cutting out a moldy wall, pulling up carpet or even vacuuming without a filter sends spores into the air, and they settle on other surfaces in the house, where they can start new growth if conditions allow. Containment is how we keep the work area separate from the rest of the home.
A typical setup includes:
- Plastic barriers. Sheeting taped and sealed around the work area, with a zipper door for entry.
- Negative air pressure. A HEPA-filtered air machine exhausts air from inside the containment, usually to the outside, so the area is at lower pressure than the rest of the house. Air flows into the work area instead of out of it.
- HVAC isolation. Supply and return vents in the work area are covered and the system is shut off or isolated, so the ducts do not spread spores.
- Decontamination zone. Workers wear protective clothing and respirators, and remove outer gear before leaving the area.
How the work goes in mold remediation
Set up containment and protect the rest of the house
Floors and furniture outside the area are covered. Equipment goes in.
Mist and remove
Affected materials such as drywall, baseboards, carpet, pad and insulation are lightly wetted to keep dust down, cut out in manageable pieces and bagged inside the containment. They are removed through a controlled path.
Clean framing and surfaces
Studs, subfloor and other materials that can remain are cleaned with HEPA vacuums and damp wiping, and sometimes sanded or wire-brushed where mold has penetrated the surface.
HEPA air filtration
Air scrubbers run throughout to capture airborne particles.
Final cleaning
Surfaces in the work area are HEPA vacuumed and wiped. Antimicrobial or encapsulant products may be applied where appropriate. See anti-microbial and odor sanitizing.
Dry and verify
The area is dried and moisture readings are taken. We confirm the structure is dry before closing it up.
Clearance
For larger or complicated jobs, we recommend independent post-remediation verification, which means a third party inspects and samples. For small jobs, a visual check and moisture readings may be enough.
What gets removed and what is kept in mold remediation
The rule of thumb is that porous materials with significant mold growth are removed, and non-porous or semi-porous materials can be cleaned.
- Usually removed: drywall, ceiling tile, insulation, carpet and pad, particleboard cabinet parts, and paper products.
- Often cleaned: solid wood framing, concrete, metal, glass, tile and hard plastics.
- Case by case: hardwood flooring, plywood sheathing and some furniture.
The inspection and scope define this. We explain what is coming out and why.
Fixing the cause in mold remediation
Mold returns if the moisture does. Before remediation is finished, the source must be found and corrected: a plumbing leak, a roof or window leak, a condensation problem, a clogged AC drain, or poor ventilation in a bathroom. In some houses, the cause is a one-time event such as a burst pipe, and drying fixes it. In others it is chronic, and a plumber, roofer or HVAC technician has to address it. We tell you what we found and who should handle it.
Your role in mold remediation
- Stay out of the work area, and keep pets away.
- Do not turn on the AC or fans in the affected area unless we say so.
- Move or tell us about valuables nearby that you want protected.
- Plan on some disruption. Containment and equipment take up space, and noise from air scrubbers is constant.
- People with respiratory conditions, allergies or a weakened immune system may want to stay elsewhere during the work. Talk to your doctor if you are unsure.
Insurance and mold remediation
Mold coverage in homeowner policies is often limited or excluded, although mold that follows a covered water loss is sometimes covered up to a cap. Read your policy and ask your insurer. Our records, including photographs, readings and a scope with the cause, help with a claim.
Why DIY often does not work in mold remediation
Bleach is not recommended for porous materials, because it does not penetrate and the water in it can feed regrowth. Painting over mold does not stop it. Scrubbing and vacuuming without containment spread spores. Small patches of surface mold on a hard material can be cleaned by a homeowner, and the EPA's guidance suggests that areas of mold larger than roughly ten square feet are best handled by professionals. Anything involving hidden growth, a sewage backup or a person with health concerns is best left to us.
What affects the cost of mold remediation
Costs depend on the area affected, how much material has to come out, the level of containment, access, how many days the work takes, and whether outside verification is used. A single contained area is a modest job. A whole-house issue is a large one. We write the scope in detail. See pricing.
Questions about mold remediation
How long does it take?
Small jobs take a day or two. Larger jobs take several days, plus drying.
Will the mold come back?
Not if the moisture is gone and everything affected has been removed or cleaned.
Do I need testing afterward?
We recommend it for larger jobs, and it can be done by an independent party.
Can I stay in the house?
For small, contained jobs, often yes. For larger ones, we recommend leaving.