How to Remove Mould From a Canvas Tent and Stop It Coming Back
Chris Burns
Mould in Canvas Tents: Why It Happens, How to Prevent It, and How to Remove It Properly
Mould in canvas tents is one of the most common issues tent owners face, especially with bell tents and other cotton canvas structures. While mould can be alarming when first spotted, it is not a fault with the tent itself. It is almost always caused by moisture, damp conditions, and lack of ongoing maintenance.
In this guide, we explain why mould forms in canvas tents, how to prevent it, and the safest ways to remove mould without damaging your tent.
Why Do Canvas Tents Get Mould?
Canvas tents are made from natural cotton or polycotton fabric. This breathable material is what makes bell tents comfortable and temperature-regulating, but it also means they are susceptible to mould if moisture is present.
Mould commonly forms when:
The tent is left erected for long periods in damp or shaded conditions
The canvas is packed away while still wet or slightly damp
There is poor airflow inside the tent
The tent is not cleaned regularly during extended use
Even tents described as all-season or suitable for year-round use still require routine care. A canvas tent is not a permanent structure and should never be considered maintenance-free.
Preventing mould is far easier than removing it. Following these steps will dramatically reduce the risk of mould forming on your tent:
1. Never Pack Away a Wet Tent
Always ensure your bell tent is completely dry before packing it away. Even slight dampness can cause mould to develop during storage.
2. Avoid Leaving Tents Up Long-Term Without Maintenance
If your tent is erected for weeks or months, it must be aired regularly, cleaned when needed, and checked for moisture build-up. Long-term erection in damp conditions without cleaning will lead to mould on any canvas tent.
3. Ensure Good Airflow
Ventilation is critical. Open doors, windows, and vents regularly to allow moisture to escape, especially during wet weather.
4. Clean the Canvas Periodically
Dirt, pollen, and organic matter provide the perfect environment for mould spores. Light cleaning during extended use can prevent mould from taking hold.
If mould does appear, it is important to deal with it correctly. Harsh chemicals, jet washing, or incorrect cleaners can permanently damage the canvas and remove its waterproofing.
Light Mould (Early Stages)
Set the tent up fully in dry weather
Brush off loose mould using a soft brush
Use a specialist canvas cleaner only
Rinse gently and allow the tent to dry completely
Heavy or Widespread Mould
For tents with heavy mould, staining, or long-term exposure, we strongly recommend professional cleaning.
We work alongside :contentReference[oaicite:0]{index=0}, who specialise in full canvas tent restoration.
They offer:
Deep mould removal
Professional canvas washing
Full re-proofing to restore water resistance
Safe treatment methods that protect the fabric
Using a professional service ensures the mould is removed properly without damaging the canvas or compromising the waterproof coating.
Mould is not a manufacturing fault and is not covered under warranty. It is caused by environmental conditions and maintenance practices.
This applies to all canvas tents, regardless of brand, price, or weight of canvas.
Regular care is essential to keep your tent in good condition and extend its lifespan.
Final Thoughts
Canvas bell tents are durable, breathable, and designed for outdoor living, but they do require care. Mould is preventable with correct use, regular cleaning, and proper storage.
If you have questions about tent care, cleaning, or long-term use, our team is always happy to help.
