If you're looking to save money and build a strong facility for your church or school, then a dome could be the best option. According to most experts, electric bills can be anywhere from 50 to 70-percent cheaper for people who use a dome-shaped building. Safety is also a key factor. Domes have extremely thick walls and don't feature sharp corners. The special design typically allows a dome to withstand high winds up to 140 miles per hour.