You clear enjoy the faff, the rest of us buy wooden sheds
never had a problem with the metal sheds , had on a concrete base used plastic liner ontop then very strong cardboard on top of plastic then a layer of gortex liner ( left over from roof build ) then put carpet leftovers ontop of that and never had a problem in winter or summer mines a yardmaster btw
As another person has already said the main issue with metal sheds is very bad condensation on the inside of the roof Only buy a metal shed if what you are putting in it can cope with water droplets regularly dripping on it You can reduce the condensation in a few ways but its just easier to buy a plastic or wood shed instead
Having spent 8 hours last weekend putting the bike store together I won't go near one of these unless it's being pretty much being given away. The instructions aren't clear enough and the holes for three of the four roof panels were in the wrong place so I spent over an hour re-drilling to make it fit as it should. Looks good once up but for the moment I can't bring myself to check if it's let any water in as I'd probably take a sledge hammer to it if it has. It's sitting empty and abandoned like a naughty child for now.
Same, mines been great, still solid with no leaks even after those bad storms we had