it's quite easy, you can do so in a day.and have the walls be 12" thick, with a cold sink at the doowway and a right angle crawlway entrance. The quickie one, for icefishing, need not have all the refinements if you're not going to live out there.a properly made igloo is 50F degrees warmer than the outside temps, just because of your body heat. That's why you want it, so you dont have to use any firewood for warmth. Saves a TON of time and calories.
Not rocket surgery my girl and boy kids did this in the back yard when in middle school.
