Ultimate Guide to Mould in Your Home

There are many causes that can contribute to the formation of mould in a home. Mould thrives in damp and dark environments, so anything that introduces moisture and darkness into your home can potentially lead to mould growth.

Here are some common ways mould spores, which are always present in the air, can find a foothold and start multiplying in your home:

• High Humidity: This is a major culprit. Daily activities like showering, cooking, and even breathing add moisture to the air. Poor ventilation traps this moisture, creating a breeding ground for mould.

• Leaks and Plumbing Issues: Leaking pipes, faulty roofs, or condensation around windows can introduce significant amounts of moisture that mould can easily utilize.

• Flooding: Even if a flood is addressed quickly, leftover moisture trapped in carpets, drywall, or insulation can lead to mould growth if not properly dried and addressed.

• Poor Ventilation: Homes with inadequate ventilation, especially in bathrooms and kitchens where moisture is abundant, allow moisture to linger and create ideal conditions for mould growth.

• Drying Clothes Indoors: While convenient, drying laundry indoors releases moisture into the air that can contribute to mould growth, particularly if there’s poor ventilation.

• Improper Storage: Storing damp items like firewood, boxes, or furniture close to walls or in poorly ventilated areas can create a microclimate suitable for mould growth.

• Lack of Sunlight: Mould spores prefer darkness. Areas that don’t receive enough sunlight, like basements or attics, are more susceptible to mould growth.

• Cold Surfaces: Warm, moist air condenses on cold surfaces like basement walls or pipes, creating a damp environment for mould to thrive.

Are mould and damp the same thing?

No, mould and damp are not the same thing, although they are closely related. But what exactly does that mean? Below we will address the definition, visible signs, and health effects of each, along with what makes them related.

Damp:

• Definition: Damp refers to the presence of excess moisture in a building or home. This moisture can come from various sources, as mentioned previously (leaks, condensation, poor ventilation).

• Visible Signs: Dampness can manifest in a few ways: visible water stains, musty odours, peeling wallpaper or paint, and feeling cold or clammy to the touch on walls or floors.

• Health Effects: While not directly harmful itself, dampness can create an environment conducive to mould growth, which can trigger allergies, respiratory problems, and other health issues.

Mould:

• Definition: Mould is a type of fungus that grows in damp and dark environments. It consists of tiny spores that are always present in the air and readily settle on damp surfaces.

• Visible Signs: Mould appears as fuzzy or slimy patches on walls, ceilings, furniture, or other surfaces. The colour can vary from black, green, brown, or white.

• Health Effects: Mould exposure can cause various health problems, including allergic reactions, respiratory problems, and skin irritation. In severe cases, it can even lead to lung infections.

What is the connection between mould and damp?

Dampness is a precursor to mould growth. Dampness paves the way for mould growth. Mould spores need a moist environment to germinate and multiply. So, damp areas in your home are at high risk of developing mould problems if left unaddressed.

However, not all damp areas will necessarily have mould growth. Factors like ventilation and the duration of dampness also play a role.

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