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Remove, Don’t Kill Mould.

Attempting to kill mould often involves harsh chemicals that can be more harmful than the mould itself. These chemicals can contribute to indoor air pollution and pose health risks, especially to those with respiratory issues.

When killed, mould spores and hyphae (roots) fragment into hundreds of toxic particles. When inhaled, these ultrafine and nanoparticles, the toxins residing on them trigger the innate immune system, which sees them as a Pathogen-associated molecular pattern.

Physical removal eliminates both the mould and its spores, reducing health risks.

IICRC S520 says numerous times that removal of mould, rather than killing, is required in mold remediation, e.g.

5.8.1 Chemicals (Antimicrobials and Biocides)

Source removal of mold contamination should always be the primary means of remediation. Indiscriminate use of antimicrobials, coatings, sealants, and cleaning chemicals is not recommended.

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