How to Build an Igloo in 10 Steps
8. To create a door, find a place on the first level of the igloo that has a vertical seam where two full-size blocks meet. There should be a full-size block over the seam–you’ll use that as the door head. Cut away half a block on either side of the seam on the first level. Then cut an arch shape into the bottom half of the overhead block, leaving the top half intact. Your door should be big enough to crawl through but small enough that you don’t let the cold air in.9. Use the saw to make a fist-sized air hole high on the side of the igloo. In snowy conditions, leave a ski pole in the hole to use like a bottle brush to keep it clear.
10. Some cautions for parents: Always supervise children when they’re playing in and around the igloo. Once the igloo is up, check it regularly for structural integrity. Never allow stoves or candles inside. Keep the air hole clear.