The insulated board, what we call here in Spain -sandwich panel is made from sth like 2x0.8mm galvanized steel or aluminum and 30-50mm expanded polyurethane in the middle. Its price is 20euro/m2 in a normal shop, 14euro/m2 from add or distributor and could be has for as low as 6euro/m2 from dismounted structure. Lengths are up to 15m i believe, width is 1m

Light frame structure with some channel to hold it and there you have something better than a container.


I dont know what is the equivalent in UK but here we also have something similar ready pre[made, they use it for offices in construction sites and is a bit more expensive than container but is insulated, has a door and windows.