Prevent mould from growing in garden sheds with 7 easy steps or risk ‘significant damage’

Britons are being urged to for mould and dampness before it is too late.

Outdoor experts at GardenBuildingsDirect have shared their advice on how to avoid spores growing in sheds and .

Mould thrives during the colder and wetter winter months with condensation and poor ventilation both exacerbating the problem.

Discoloured spots on the inside walls and ceilings of the shed are a sure sign of mould as is a damp and musty smell. Other things to look out for include damp patches, staining and peeling.

Laura Bamborough from said: “Mould can cause significant damage to your shed and the items stored inside. It thrives in damp, poorly ventilated spaces, which can cause wood rot, rust, and structural damage.

“Good ventilation is key in preventing mould growth and it’s important to ensure air can circulate freely. Try leaving doors or windows open to provide airflow as a starting point. But one of the most important aspects is to make sure any wood is treated so that bacteria can’t grow on and inside it.

“Keep the shed dry by repairing leaks, checking the roof is in good condition, and sealing any gaps and cracks. Taking action early will prevent the problem from getting worse and stop any long-term damage.”

How to prevent mould from growing in the shed:

Improve ventilation

Getting a good flow of air through the shed will help prevent mould. If you have windows, open them or install vents to reduce humidity levels.

Check the roof

Shed roofs take a beating from the elements, so check regularly for any signs of damage or missing materials. If there are problems, you may be able to patch them up; otherwise, your shed may need re-roofing.

Protect the shed

Treating your shed will help protect it from the weather, wood rot, mould and algae. Pick the preservative best for you and make sure you apply annually to keep the outdoor building in good condition.

Dry items before storing

Make sure items are dry when you put them away to avoid mouldy patches. Keeping tools dry and disinfected as well as other outdoor items will help avoid mould formation.

Prevent leaks

Check your shed regularly for any cracks or gaps. To fix, use a sealant or apply waterproofing to the joints.

Moisture absorbers

Place moisture absorbers around your shed to prevent dampness and mould. If you have a dehumidifier you could run it in the shed or summerhouse but make sure you have a secure and safe power source.

Rising damp

To stop rising damp, a barrier needs to be built between the shed floor and the ground. That could be concrete slabs or gravel.

Insulation

Add insulation to your shed to keep it at a regular temperature. This will help limit moisture buildup.

Plastic storage

Think about how you store items in your shed. Sealing garden toys, cushions and smaller items in plastic containers will protect them from the elements. Plastic is resistant to moisture so an obvious storage choice.