When you think about buying a dehumidifier, you probably ask yourself “will a dehumidifier help with mould?.
Let’s first understand how mould thrives. It is quite simple-mould loves a highly damp and a poor air-flow space.They feed upon organic matter like wood, fabrics, and paper. It spreads really fast within 24-48hrs so it’s important to treat them early. To top it all- it causes serious health issues (respiratory and allergies).
So,the short answer is: a dehumidifier will not kill mould but will help prevent its spread by reducing moisture.
So, how does that happen?
How Does a Dehumidifier Help Prevent Mould?
When moisture is in the air, it does not escape without moisture treatment equipment. Examples of these types of equipment include a dehumidifier; with this equipment, the moisture from the air is drawn out and is then allowed to remain in an indoor environment anywhere between 30 and 50 percent (which is the ideal range to stop mould from thriving)
Signs You Need a Dehumidifier:
✅ Musty smells and visible mould spots on walls, ceilings, or furniture
✅ Presence of condensation on windows and glass surfaces
✅ Damp spots on walls and floors
✅ Consistent dampness in basements, bathrooms, or laundry areas
✅ Peeling wallpaper or rotting wood
Dehumidifiers: A Preventive Solution, Not a Cure
While a dehumidifier can prevent mould from growing, it won’t remove existing mould. If you already have a mould problem, you’ll need to:
1️⃣ Identify the Source – Check for leaks, poor drainage, or high humidity.
2️⃣ Remove Mould Safely – Use a specialist cleaner or consult professionals.
3️⃣ Improve Ventilation – Open windows, use exhaust fans, and ensure proper airflow.
4️⃣ Use a Dehumidifier – To maintain low humidity and prevent future growth.
Choosing the Right Dehumidifier
For effective mould prevention, choose a dehumidifier suited to your space. Factors to consider:
1️⃣ Find out the source – checking for leaks, substandard drainage or high humidity.
2️⃣ Remove Mould – either through a cleaner or hire an expert.
3️⃣ Ventilate – Open windows, exhaust fans and allow proper airflow.
4️⃣ Dehumidifier – To keep the humidity lower and thus fight against future growth
When to Call a Professional
If, however, mould keeps coming back after using a dehumidifier, this shows that there are serious cases like having hidden or even poor insulation leakage. This is where a mould remediation expert can be put to task to assess and offer lasting solutions to the problem.
Final Remarks:
Dehumidifier is probably one of the best by which to keep mould at bay; however, it fails as a one-word cure. Reduce moisture, improve airflow, eliminate problem sources for a long-term if you want a mould-free home.
Need to rent a dehumidifier? Explore our range of high-performance dehumidifiers for reliable moisture control!
FAQ’s
Will a dehumidifier help with mould?
No, though a dehumidifier can control the introduction and spread of mould through its moisture-removing ability. Physically cleaning the area and resolving the underlying moisture issue are both prerequisites to removing mould.
At what humidity level is mould prevented from growing?
Humidity levels indoors must be held between 30%-50% in order to hinder mould. When levels exceed 60%, mould, mildew, and dust mites can thrive.
Where should I place the dehumidifier to help prevent mould?
Position the dehumidifier in areas prone to moisture such as in basements, bathrooms, kitchens, and laundry rooms. Ideally, place centrally in the area to allow for free airflow at least 6 inches from walls and other furniture.
How long does it take for a dehumidifier to stop mould?
Dehumidifiers can reduce humidity levels in just hours, but will not, by themselves, remove visible mould. Keeping humidity levels consistently below 50% prevents future growth of mould.
Can I replace a dehumidifier with an air purifier?
No. Purifiers will eliminate spores from the air but will do nothing to improve humidity levels. Conversely, dehumidifiers work by removing moisture to check mould and mildews’ growth; they are thus directly opposed to the purifiers that improve the air quality.
Do I need a dehumidifier if I have mould already?
Yes! Dehumidifiers are essential for preventing mould from reappearing, even though they cannot remove mould that is already present. Mould can return in a matter of days if moisture is not kept in check.
How do I permanently get rid of mould? To get rid of mould forever:
✔ Locate sources such as leaks, condensation, poor ventilation
✔ Physically remove mould with special cleaners
✔ Improve air circulation by using fans and opening windows
✔ Use a dehumidifier to keep the humidity low
Does dehumidifier safe to sleep?
Yes. Dehumidifiers are safe in bedrooms and are instrumental in improving air quality by removing allergens and dust mites. Choose a model with low noise and energy-efficient during the night.
Should I operate a dehumidifier in winter?
Yes; use a desiccant dehumidifier in cool conditions. Compressor dehumidifiers are ineffective below 15 degrees Celsius.
When should I call the professionals for mould removal?
If mould covers an area of more than 1 square metre, is recurring, or causes any health problems, a mould remediation specialist should be called to assess and tackle the problem.