Mold Removal FAQ for Portland, Oregon

It can be, depending on the person. The CDC says that for some people mold can cause a stuffy nose, sore throat, coughing or wheezing, burning eyes, or skin rash, that people with asthma or mold allergies may have severe reactions, and that immune-compromised people and people with chronic lung disease may get lung infections from mold. Color does not reliably show risk, so any significant growth is worth addressing, and the moisture behind it even more so.

Visible growth or a musty, earthy smell usually means mold. Dark marks can also be dirt, soot, or mineral deposits. Is it mold, mildew, or dirt? shows what each tends to look like and which quick checks help.

Moisture. NOAA's 1991 to 2020 normals put about 74 percent of Portland's rain in October through March, which is also when homes are closed up and heated, so moisture builds up inside. Why Portland-area homes get mold walks through the year month by month.

The EPA says below 60 percent, ideally between 30 and 50 percent. The CDC says no higher than 50 percent all day long. An inexpensive hygrometer tells you where your home stands. Water damage and moisture control covers chronic dampness.

The EPA advises drying water-damaged areas and items within 24 to 48 hours to prevent mold growth. After that, the risk grows with each wet day, depending on the material and the room. The water damage page explains how professional drying works.

Usually not. The CDC does not recommend mold testing, and OSHA and the EPA say that when visible mold is present, sampling is usually unnecessary. The EPA says sampling may be considered when litigation is involved, the source of the contamination is unclear, or health concerns are an issue. See mold inspection and testing.

A visual inspection, moisture readings with a meter, often a thermal camera, and sometimes a borescope to see inside cavities, followed by a written report on where the moisture is coming from and what it has reached. The inspection page explains what each instrument shows.

A kit shows that mold spores exist, which is true of every indoor space, and it cannot show where the water is. Finding the moisture matters more than identifying the species.

Probably not in the way you would want. Oregon's home inspector standards (OAR 812-008) describe inspections as visual and not technically exhaustive, and say inspectors are not required to determine the presence of suspected adverse environmental conditions or hazardous substances. They do require reporting signs of abnormal or harmful water penetration or condensation. The inspection page has more.

It depends on the size of the area, the materials involved, access (such as an attic or crawl space), and how much containment is required, so we price from a written scope after an inspection rather than quoting blind. A small, contained job costs far less than a crawl space or whole-room project. The remediation page lists the cost drivers.

Small areas (the EPA suggests under about 10 square feet) on hard surfaces can often be cleaned by a homeowner with detergent, water, gloves, eye protection, and a respirator. Larger areas, hidden growth, or mold after a flood or sewage backup should be handled by a professional. Does bleach kill mold? covers what the agencies say about cleaning products.

The work area is isolated, air is filtered with HEPA equipment, moldy porous materials that cannot be cleaned are removed, hard and structural surfaces are cleaned and dried, and the result is checked. Our process and the remediation page explain each step.

It depends on the size of the work and who lives there. The New York City health guidelines, widely used in the field, recommend that people with asthma, allergies, a weakened immune system, or chronic lung disease be removed from the affected area during remediation, and call for the work area itself to be unoccupied. The remediation page covers this in more detail.

The EPA's criteria are that the water or moisture problem is completely fixed, visible mold and moldy odors are gone, and, if sampling was done, indoor results are similar to outdoors. People should also be able to use the space without health complaints. See post-remediation verification.

Only if moisture does. OSHA states that the underlying cause of water accumulation must be rectified or the mold growth will reoccur. That is why our written scope identifies the moisture fix and keeps it separate from the mold work.

Stop the water, photograph the damage before moving anything, and start drying right away. The EPA advises drying within 24 to 48 hours. Keep receipts, and call your insurer before permanent repairs. See water damage and moisture control and how mold insurance claims work in Oregon.

Yes. Sewage and floodwater are Category 3, grossly contaminated water. The CDC says drywall and insulation contaminated with sewage or floodwater should be removed and discarded, and the City of Portland says to call a plumber first when sewage backs up. See flood and sewage damage.

Often. Roof water, the slope of the ground, and ground moisture feed crawl spaces, basements, and walls. See gutters and drainage and crawl space and subfloor mold.

It depends on the cause. Triple-I says mold generally is not covered but its cleanup may be when mold growth is the direct result of a covered peril such as a burst pipe, and the Texas Department of Insurance says most home policies do not cover water damage from gradual leaks or seepage. Your policy and your insurer decide. Does homeowners insurance cover mold in Oregon? explains what to check and the claim deadlines Oregon sets for insurers.

We can provide moisture readings, photos, and a written scope of work that your insurer may ask for. Coverage decisions are between you and your insurance company.

Oregon's ORS 90.320 requires landlords to keep a rental habitable, including effective waterproofing and weather protection, floors, walls, and ceilings in good repair, and working ventilation. It does not name mold, and tenants have duties of their own under ORS 90.325. This is general information, not legal advice. See the property manager and landlord page.

Yes. The property manager and landlord page describes the workflow, from the first tenant report to a unit that is ready to rent.

Yes. Offices, retail, restaurants, and other occupied buildings add air handling, schedules, and documentation needs. See commercial mold remediation.

Scheduling depends on the season and workload. Tell us if there's an active leak or recent water damage when you reach out so we can prioritize.

Yes. If a problem is small, or testing wouldn't change what you do, we'll say so.

We carry the job through those repairs, so you are not left with a clean but unfinished room. When a repair falls outside our own work, we bring in someone who can do it properly; every company we work with handles water damage repairs and full restoration. The process page explains how.

We document our work and stand behind it. Because mold returns when moisture returns, any warranty is tied to the moisture source being corrected. Ask us for the specific terms in your written scope.

Portland, Beaverton, Lake Oswego, Tigard, Hillsboro, Gresham, Happy Valley, West Linn, Oregon City, Milwaukie, Sherwood, and Tualatin, along with nearby communities. See the service areas.