Mould is primarily caused by moisture.
Here's a more detailed explanation:
Mould, a type of fungus, thrives in damp and humid environments. It's not enough for mould spores to simply exist; they require moisture to activate and grow. Several factors can contribute to mould growth:
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Condensation: When warm, moist air comes into contact with cold surfaces (like walls, windows, or mirrors), condensation occurs. This creates the ideal damp conditions for mould to flourish.
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Leaks: Leaks in roofs, plumbing, or walls can provide a constant source of moisture, leading to mould growth. Even small, slow leaks can create enough moisture to sustain mould.
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High Humidity: Elevated humidity levels, especially in poorly ventilated areas like bathrooms and basements, encourage mould growth.
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Flooding: Flooding, whether from natural disasters or burst pipes, introduces large amounts of water, creating extensive dampness suitable for mould.
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Poor Ventilation: Inadequate ventilation traps moisture and allows it to accumulate, increasing the risk of mould development.
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Organic Materials: Mould feeds on organic materials like wood, drywall, paper, and fabrics. Damp organic materials become a food source for mould, facilitating its growth.
In summary, while mould spores are ubiquitous, moisture is the key ingredient that allows these spores to germinate and grow into visible mould colonies. Controlling moisture is crucial for preventing mould growth in homes and buildings.