Originally Posted by GREEN THERAPY
Just came inside from the back field after a partial nite of testing a hammock cover made from DWR ripstop. I left a ventilation hole in the nose end in the hopes that I would not have any condensation issues. Unfortunately my hopes were not realized, huge condenstaion problem. Will have to modify the top cover with breathable material to make it usable. Temp was 37 F and other than the condensation issue was very comfy. I have one that is built from a water repellent fabric and is a lot more breathable that I am going to go give a try. Used one last weekend made from polyester with no condensation issues at around 34 F. See if I can get two out of three. The second test worked great. Temp dropped to 32F with no issues. To steal a line from a song....... two out of three ain't bad.
Was there any difference in humidity between the time it worked and didn't? It looks like the humidity in your area was pretty close to 100% last night, maybe that made the difference and not the breathability of the fabric? Was there any condensation on your tarp, or just inside the cover? I'm just speculating, condensation issues continue to puzzle me...