Preventing mould in the bathroom

How does mould develop in the bathroom?

Mould is caused by areas of the bathroom becoming or remaining damp. Mould is particularly likely to grow on porous surfaces.

This is why you will often find mould on the rough surface of the ceiling or under the edges of kits.

5 tips for better bathroom extraction

If you want to tackle mould effectively, a good bathroom extractor is essential. Of course, you can start by using cleaning products to remove mould. But prevention is always better than to cure. So find out what is causing the problem.

Bathroom mould is caused by moisture not being able to escape, so improve bathroom extraction!

Here are five tips on how to do this.

1. The ventilation capacity

First of all, the ventilation capacity in the bathroom must be adequate. We recommend a minimum ventilation capacity of 50 m3/h (on the high setting). An approved company will be able to adjust or check this for you.

If the ventilation capacity is insufficient, the bathroom fan may need to be replaced.

2. Proper use

Use the mechanical ventilation controller as intended. For example, the high setting should be used for showering and cooking.

After showering, the fan should run at this setting for one hour. Then check that the moisture has disappeared from your bathroom and switch back to the normal ventilation setting. If you have a humidity sensor, your system will automatically switch back when the humidity is gone.

3. Enough fresh air

Make sure there is a good supply of fresh air in the bathroom. The best way to do this is through an opening under the bathroom door.

If you leave about 1.5 cm free at the bottom, fresh air can always come in (evenly).

4. The right temperature

The bathroom needs to be at a 'normal' temperature of around 18-20 degrees. Moisture is more likely to build up on cold bathroom walls than on a warm surface.

5. Keep the bathroom door shut 

Close the bathroom door when taking a shower. This is because an open door 'short-circuits' the air supply to the grille.

As a result, the air in the bathroom is not fully 'flushed'.

Want to know more about improving your indoor climate?

Want to know more about how to improve your indoor climate? Then check out our other blogs. Our blogs are designed to give you tips and information. For example, we have a blog about what you can do to combat dry air in your home.

Do you have a question for us? Feel free to contact us. We are happy to think along with you when it comes to ventilation.