@HomesteadRanger featured in the book at this link: https://a.co/d/cV5s8Sm Gives the Basic Concept and Construction Steps for this Home Designed to Survive any Disaster including the Apocolypse. This Off-Grid Home has a nearly 2 foot thick reinforced concrete living roof with double waterproof barriers and extensive security features, as well as passive heating and cooling considerations. Prepare for Doomsday by learning how to do-it-yourself with this Bunker, Fortress, of a home.