Hangar
Slingblade
I have experience in Belgium and France (7 years)
1. Certainly go for a good dry floor (concrete in Belgium, thick "tout venant" in France, depends on building limits)
2. Have a good roof, preferebly insulated (mine is insultated wood)
3. The walls dont matter that much except that you may want indeed to be able to be a few degrees above ambiant for condensation so a certain degree of insulation is needed(mine are wood but not fully wind thight so that there is good ventilation)
4. Mind cows and other old animal barns with related acids, they may accelerate corrosion quite a bit
5. Don't forget to have electricity, even if it is "temporary"
delta3