I have a polycarbonate greenhouse. It is an Eden Clearline. It took 2 separate attempts to put it up with a year inbetween! The sheets are now full of mummified slugs and snails never to escape. The panels do not fit in properly and it took me days to put up, having collapsed during the process and driven me to insanity. I eventually had to ask for help as trying to balance the roof beam on a forever collapsing frame was never going to work. I worked through high winds and rain until it was completed, otherwise it just kept falling down! It is now up....for how long I do not know. I have bought some exterior sealant to seal the gaps--there are lots -- and the door hangs off leaving a large gap at the bottom and a cold draught! But I love it all the same