How high should I make my ceiling in my new shop,,,10 feet or 12 feet

Foam is great but can you spray it on metal ?
Thought you need ventilation
Yes totally can it will stick to anything. I sealed all My roof soffits and did closed cell. I Nevada with dryer air it works great. I wired for ceiling fans for future getting the air to circulate but you will be fine. In locations where there is more humidity you will need to add humidifier or some way to dry the air. But after further research I should have sprayed fire proof paint on it as spray foam is pretty flammable.
Foam is great but can you spray it on metal ?
Thought you need ventilation