transparent masonry paint

What causes black mould in the home?

Black mould in your property is usually caused by condensation.


  • Small droplets of water that form on a cold surface
  • The process by which water vapour in the air is changed into liquid water

Water on windows and walls are giveaway signs of condensation in the home. It occurs whenever warm, humid air comes into contact with a cold surface. An example we can all relate to, is the “fogging” of your mirror after taking a shower.

You may start to notice black spots/stains in your home. This can be on window cills, frames, walls, wallpaper and even on fabric blinds/curtains – this is the beginning of mould growth. In the majority of cases black mould is caused by condensation. Condensation creates the ideal conditions to promote mould growth within the home.

The way we live our day to day lives can also add to this problem. Washing machines and tumble dryers should be vented outside. An un-vented internal tumble dryer creates an enormous amount of water vapour. Once this water vapour settles onto cold walls – condensation is formed, quickly followed by mould.

Condensation and associated black mould problems can be eliminated by improving insulation, heating and ventilation within the home.

Addressing the insulation, increasing air flow and having some low heating within the home, especially throughout the winter will greatly reduce the amount of condensation/mould in your property.

There are a number of ways to address any mould that is already present in your property – Get in touch and we will gladly advise you on a solution.

Red Rose Paint Supplies Ltd.
t/a Decor8 Unit 3,
Festival Trade Park,
Crown Rd,
Stoke-On-Trent, Staffordshire ST1 5NJ
01782 272 542