I have profited enormously from many of the threads on this site, and thought I would pass on some information I came across in looking for a cover for our wood stack. We get a lot of snow, particularly drifting up here, and digging the wood out of it really necessitated a cover. Regular tarps don't last too long, and at this point, we don't want to build a more permanent cover. I then came across this site that sold used billboard tarps. These are heavy, 3 ply PVC tarps from discontinued billboard ads. The one we bought, 10' by 36' weighs about 30 pounds. Water proof, and UV protected, we are hoping this might last us a while, and there is the added bonus of using recycled materials. I will post an update next year after we see how it works this winter.
http://www.billboardtarps.com/
http://www.billboardtarps.com/