Why does mould keep growing on my ceiling and how to stop it?

I am often asked,”how can insulation stop mould?”, well mould needs heat and moisture to grow, that is why you will notice that your mould problem is worse in summer than in winter.

When will insulation help to stop mould forming on your ceiling, If the mould is associated with a very small area it is more likely that it is related to a roof leak above that area. If it can be stoped by insulating your home then it will almost certainly have patterns left by the timber structure above the ceiling.

Of course if insulation does not stop the mould then you will need additional ventilation to move stale, damp air out of the internal space of your home but insulation is normally the first and biggest part of the solution to mould problems on ceilings in Queensland.

If you install cellulose fibre insulation it will be more effective at stopping mould just because it stops more heat than batts do as it is pumped in. Mainly because it is pumped in and has no gaps but batts are very hard to install with no gaps. The other reason it is better for stopping mould is because the borax in the product is actually a natural fungicide and kills any mould it contacts. Of course it will not contact the mould on the inside of your ceiling but it will contact any existing mould up in your roof space and kill it. Borax is also a natural disinfectant and so your roof is left smelling a lot cleaner and without any mouldy smells it might have had before.