In reply to Simon Caldwell:
> Are you certain it's not condensation? My only experience of a single skin goretex tent was decades ago, and I found that condensation was significantly worse in heavy rain.
I'm with you on this I think, these tents are little more than posh bivy bags and if you sleep with your head inside a bivy bag all night you'll wake up wet. Combine this with the rain on the exterior that will increase the condensation on the inside and you're going to get wet unless there's a gale blowing to keep the air moving through the tent.
I think the best plan (before fabsil is used which will turn the tent into a glorified plastic bag) would be to pitch the tent in the garden then get in with a roll of tissue while someone hoses it down. At which point you'll know you either have a not very breathable tent, a leaky tent or if you fabsil it a totally un breathable and unusable tent.
These tents really aren't designed for normal use, they are mountain shelters for