Moisture control
The treatment for mould that is not a cleaning product. Every authority in this register puts it first, and it is the only one that stops the problem recurring.
In detail
Moisture control means lowering the humidity and drying the wet surfaces that let biological growth establish, and it is included here as a method because the mould authorities treat it as the primary one rather than as prevention offered after the fact. The environmental regulator's position is that the moisture problem must be corrected or growth returns, and that removing what is visible without addressing moisture is not a solution. A state health department frames control of indoor humidity and prompt drying of wet materials as the measures that prevent growth. The measures are unglamorous and specific: ventilate during and after showering and cooking, dry wet surfaces rather than leaving them, keep furniture off cold external walls so air can move behind it, deal with condensation on the coldest surfaces first because that is where growth starts, and fix the leak. Where a room cannot be ventilated adequately, mechanical dehumidification does the same job. The same method matters after any wet cleaning: a soft surface that dries slowly develops odour and brown wicking marks, and airflow decides that more than product does.
What works
Moisture control is effective against Mould Strongly supported
Moisture control is effective against Mildew Strongly supported
Moisture control is effective against Mould fungi Strongly supported
It denies the spores the water they need to germinate. It does not kill them, and the source says so in the same document.
Why
- Moisture control is explained by Moisture control and recurrence
- Moisture control is explained by Natural drying symbols
Sources for this page
Sources
A Brief Guide to Mold, Moisture, and Your Home
United States Environmental Protection Agency (EPA), Office of Air and Radiation, 2012 · Government or regulator
Relied on for: That controlling indoor moisture is the primary measure against mould growth and that growth returns where the moisture source is not corrected. (states this directly)
Verification: a person has read the passage relied on.
Read on — Read in full. The load-bearing passages are 'Cleanup and Biocides' (p.15), the 'Please note' immediately below it, 'Mold Cleanup Guidelines' and the Bathroom Tip (p.6), the porous-materials bullet (p.7), 'How do I get rid of mold?' (p.3), 'What to Wear' (pp.8–9) and the humidity targets (p.11). Supports a wider statement — our claim was widened. The catalogue previously recorded that no authority it held recommended bleach for mould. It can now record that the federal regulator positively does not recommend it as routine, while carrying that this is advice against ROUTINE use rather than a prohibition, and that the agency leaves room for professional judgement. The kill-versus-remove sentence became the governing fact of the whole mould family and is what several backlog rows actually needed. The Sprint 5 record against the short EPA page stands unchanged and correct about that page; this is a different document, cited separately.
Minnesota Department of Health · Government or regulator
Relied on for: That controlling indoor humidity and drying wet materials promptly are what prevent mould growth. (states this directly)
Verification: a person has read the passage relied on.
Read on — The cleanup steps, the bleach step, and the salvageable-materials section. Page last updated 19 February 2026. Supports the claim as stated.
Last reviewed by a person on .