All Bell Tent Boutique Tents are treated with Waterproofing and Mould resistor. It is however important to understand what Mould resistor will do for canvas. 

The pre-treatment of mould resistor and waterproofing are impregnated into the fabric rolls before the tents are created, this treatment will extend the period of time a tent can be pitched for but ultimately all canvas left out for extended periods or packed away wet/damp will eventually form mould if not treated.

This treatment is designed to protect tents for the duration of holiday camping in wet conditions. It will not stop mould forming eventually. Mould protector will not block mould from forming over time with extended pitching. Do not rely on this treatment as your only protection against mould.
We suggest, depending on usage retreating your bell tent after a few seasons.