Trevor,
I tried a cover- admittedly as a temporary measure- while my new garage was being built. Ben and Mike do a lot of my work, so I went with a Tyvek. We then had a glitch with the builders and I put up a cheapo wooden structure as a very temporary measure and used a Carcoon within that ( Went for a Carcoon only because the Air Chamber was a bit bigger when erected and I needed the room to work around the car) I now have the new garage sorted - complete with heating but I still use the Carcoon to store between Dec and late Feb/March. Excellent bit of kit and takes me about ten minutes to get the car out if we get fine weather during those months ( It's Wales, so as you can imagine, we ain't short of rain here!) The Tyvek was OK but, in my experience, nothing so good as a wooden structure plus Carcoon
Cheers.
