Black Mould

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You've cleaned it.

You've treated it.

You've painted over it.

And a few months later, it's back.

If black mould continually returns, simply treating the visible mould may not address the underlying reason it is forming.

One common cause is cold-wall condensation.

Warm air inside a home contains moisture.

When that warm, moisture-laden air comes into contact with a sufficiently cold wall, its temperature can fall below the dew point and condensation forms on the surface.

Persistent moisture then creates conditions in which black mould can develop.

Cold external walls

Corners

Bedrooms

Behind furniture

Window reveals

Thermal bridges

Solid external walls

Older terraced houses and 1930s properties can be particularly susceptible.

Our approach is to understand why the affected surface is cold and damp before recommending a solution.

Where appropriate, improving the thermal characteristics of the wall using TIWI internal cork insulation can help address the conditions contributing to condensation.

We also work with landlords dealing with recurring condensation and black mould in rental properties.

Rather than repeatedly cleaning, treating and redecorating the same wall, we can investigate whether the underlying cold-wall problem can be improved.