Single layer of 4 mil over rounded top, corners tacked with stapler to hold in place while I wrapped the sides. Shrink wrap overlapped about by half, so effectively double. One 10x50 roll and a little bit of poly; roll was about $40, one 18"X1000' roll of shrink-wrap and a little bit. I think the 4 roll case of shrink wrap was about $50, and the dispenser $25 +/-. One pic shows the first few individually wrapped this, second one the start of last year's 2-4 pallets in one kilnsDo you know your plastic costs for those 22 pallets? That is 11 cords, a lot! I am curious how you do your wrapping. Is your wood stacked flat on top or rounded top? You put the 4mil poly on the top? How? You just wrap round and round the bottom with the shrink wrap? Wrap just one layer thick? Is all of this enclosed or is there any venting?