What Causes Black Mould

Black mould, also known as Stachybotrys chartarum, thrives in damp environments with a food source. Here’s how your home can create the perfect storm for this unwelcome guest.

Hidden moisture is key. Leaks in pipes, taps, or even roofs can introduce moisture behind walls, under floors, or in ceilings. These hidden culprits can dampen areas without causing obvious signs of poor ventilation, allowing mould to flourish out of sight.

Condensation lurks on cold surfaces. Even with good airflow, condensation can form on cold surfaces throughout your house. This is especially true in cold weather or humid climates. Places like poorly insulated pipes, basement walls, and windows can become breeding grounds for condensation and subsequent mould growth.

Previously damp materials become havens. Building materials that were once exposed to excessive moisture, whether from leaks, flooding, or improper drying during construction, can harbour moisture even if the source has vanished. This residual dampness can be enough to sustain mould growth.

Persistent high humidity creates an opportunity. While ventilation helps control humidity, even average airflow might allow high humidity levels to persist. This, combined with cool surfaces or readily available organic material (like dust or wood), can create an environment ripe for mould spores to take root.

Black mould can thrive on various organic materials, including wood, drywall, carpet, and even dust. By controlling moisture levels and addressing potential sources of dampness, you can significantly reduce the risk of black mould taking hold in your home.

What is the best way to remove mould permanently?

Removing mould permanently requires the right approach, depending on the size and location of the infestation. Here’s a breakdown of DIY methods and professional remediation:

Tackling Small Mold Issues Yourself

For small mould patches on surfaces like tile, glass, or metal, a DIY approach might be suitable. Remember safety first! Wear gloves, a respirator, and goggles to avoid inhaling mould spores.

Mix a solution of warm water and dish soap, or use a commercial mould remover following the manufacturer’s instructions. Scrub the mouldy area with the solution using a stiff brush, then rinse thoroughly with clean water.

Finally, allow the area to dry completely. Fans or dehumidifiers can speed up drying to prevent mould from coming back. For better results, consider using a mould surface cleaner.

Important Considerations for DIY mould removal

DIY methods only work for very minor mould problems on non-porous surfaces. If the mould covers a larger area, affects porous materials like drywall, or you have any health concerns, professional help is crucial.

Large infestations or those on porous surfaces can release a significant number of spores, posing health risks. In these cases, professionals can remove the mould safely and effectively.

When do I Call Professionals?

Professional mould remediation is the best course of action for larger infestations, on porous materials, or if you have health concerns. Professionals have the expertise, equipment, and experience to safely remove mould, including hidden mould behind walls or ceilings.

They can also use containment techniques to minimize the spread of spores during removal and identify the underlying moisture problem that caused the mould growth in the first place, preventing it from recurring.

Signs You Need a Professional:

• The mould covers more than a square foot of surface area.
• The mould is located on porous materials like drywall, wood, or carpet.
• You have a weakened immune system, allergies, or respiratory difficulties and suspect mould growth.
• You’re unsure about the type of mould or the extent of the infestation.

Eliminate black mould from your home