As with any shop of any size even if you can close all of the doors there seems to always be air currents which can effect the quality of mig welding. A sudden gust of wind from an open door can cause porosity in your welds and when welding alloy metals ore even just structural steel this can lead to a failed weldment.
I also needed a barrier to prevent others from getting arc eye I don't have any employees at this time but eventually when there are other workers
I don't want the possible workmen's comp claims associated with this.
Plus I needed to secure an area completely shielded from the wind since I still have a 17 ft by 48ft open doorway to the west.
Here is my solution, I used the side tarp from a Conestoga trailer kit. these are tarps designed to turn a flat bed semi trailer into a dry box, but one that you can roll the kit either forward or to the rear of the trailer exposing nearly the whole bed of the trailer.
Attachment 39108
Attachment 39109
I have plenty of room inside