Mold

Exterior wall with metal ventilation pipe and windows

Mold Clearance Testing: A Practical Guide to Passing Post-Remediation Verification

Written by Rarefied Air | March 28, 2024
After you fix a moisture problem and remove mold, you still need evidence that the affected space is dry, clean, and ready for the next step. That is where mold clearance testing, also called post-remediation verification (PRV), comes in. Clearance testing evaluates whether the original moisture problem has been addressed, affected areas have been properly
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Flooded interior with peeling, damaged walls

Mold Inspection After Flood: A Practical Guide to Find, Fix, and Prevent Mold

Written by Rarefied Air | January 25, 2024
Floodwater does more than soak what you can see. Moisture can travel behind baseboards, underneath flooring, into drywall, and through HVAC components, creating conditions where mold can develop out of sight. That is why a mold inspection after flood damage should focus on more than obvious stains or visible growth. You need to understand where
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A man in protective gear holding an aerosol can

Direct Fungal Examination: Environmental Mold Sampling Methodology

Written by Rarefied Air | December 15, 2023
Direct fungal examination is a laboratory method that examines fungal spores, fragments, and other structures collected from air, surfaces, or building materials without first culturing the fungi. For an indoor mold investigation, that distinction matters. Because the sample can be examined microscopically, rather than waiting for organisms to grow, direct fungal examination (DFE) can provide
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Water-damaged room with mold growth and standing water

Common Signs & Symptoms of Mold Contamination

Written by Rarefied Air | July 6, 2023
Mold contamination can develop anywhere excess moisture persists, from bathrooms and kitchens to wall cavities, ceilings, flooring, and HVAC-related areas. Sometimes the signs are obvious, such as visible growth or a musty odor. Other times, the first clue is evidence of a moisture problem that could support hidden mold growth. Knowing what to look for
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how rain and roof leaks lead to mold

Can a Leaky Roof Cause Mold? Common Signs & Prevention Strategies

Written by Rarefied Air | February 2, 2021
Can a leaky roof cause mold? You might think a leaking roof is just a structural nuisance, but when mold thrives in those damp spaces, it puts your family’s health and your home’s value at serious risk. Learn how moisture from roof leaks creates ideal conditions for mold growth, and what steps you can take
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Old building with peeling exterior paint

California SB 655 Explained: Mold, Habitability, and Rental Housing

Written by Rarefied Air | May 4, 2018
California SB 655 is the 2015 state law that made visible mold an explicit housing-code concern. It clarified when mold can make a building legally substandard and established key rules for landlords, tenants, and local enforcement officials. If you own, manage, or rent residential property in California, understanding SB 655 can help you recognize when
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