Shelter Logic Portable Shed Moisture Problem

[RWBIL]

I have 2 regular sheds in my backyard and have no issue with them. Needed more space so put up this large portable garage and mold and mildew are growing everywhere. The shed was placed on the ground but I put plastic on the ground. I thought it would help stop moisture issues. The front door is usually not zipped and left open so air can get in. Because the shed is just a tarp there is no air vent at the top.

I see they sell some vent kits but they are not fan powered. I am not sure if I added them to the sides up high if they would help or not.


I am not sure why I am getting so much mold. It is all over my wood shelves, appliances and everything in the shed. Some of it is a powdery green mold if that helps.

Any suggestions appreciated.

 

[slowzuki]

I found if the edges are down to the ground my firewood got very mushroomy in mine. I started leaving the door completely unzipped and propped the back sheet up about 6" at the bottom. The wind seemed to keep it much better ventilated after that.