STRAIGHT ANSWER

Can carpet cleaning remove mould?

Surface growth on a damp carpet may be addressed, but mould growing in the padding or subfloor after a real water event usually needs the affected material removed rather than cleaned. A cleaner should be honest about when it is a cleaning job and when it is a remediation job. Spiker tells you which one you have.

WRITTEN BY · BRIAN SPIKER · OWNERFROM · 13+ YEARS ON THE TRUCKSTANDARD · TRAINED TO AND OPERATING BY THE IICRC S100 STANDARD

The honest answer first

Cleaning does not remediate mould, and we will not tell you otherwise. If carpet has been wet long enough to grow it — particularly if the pad is affected — that is a remediation job and often a replacement.

What cleaning can genuinely do is address moisture-related odour and help you work out whether you are looking at a cleaning problem or a water problem. That distinction is worth more than another treatment.

Why the padding decides it

The pad is absorbent and it sits under a carpet that slows evaporation. Once water reaches it, it stays wet far longer than the face fibre does, and it is out of sight the whole time.

Surface growth on the face of a carpet that got damp and dried reasonably fast is a different situation from growth in a saturated pad after a leak or a flood. The first may respond. The second is behind material that has to come up.

What a real water event needs

Material removal, drying to a measured standard, and treatment of the structure underneath — which is restoration work, not cleaning. Spiker does not pull carpet, replace padding or seal subfloors.

Saying so costs us the job, and it is the right answer. Cleaning over a wet pad puts more moisture into the exact place the problem lives.

And how to keep it from starting

It is a drying question. Proper extraction recovers most of the water in the same pass, so carpet is damp rather than soaked and dries in four to eight hours with airflow.

Carpet still wet a day or two later is the condition that starts this, which is also why furniture never goes back onto damp carpet: a sofa blocks airflow completely and what grows underneath is mildew nobody sees until it smells.

PEOPLE ALSO ASK

The follow-up
questions.

No, and nobody should tell you it does. Cleaning is not remediation. If carpet has been wet long enough to grow mould, particularly in the pad, the affected material generally has to come out.

Usually by how the carpet got wet and for how long. A spill blotted quickly is different from a leak that ran for days. If there is a musty smell that returns when the room is closed up, assume it is below the surface and get it looked at.

That is restoration rather than cleaning, and it is a different trade with different equipment and documentation. We will tell you that plainly rather than take the job.

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