Will concrete cinder blocks filled with quickcrete and reinforced with number 4 steel rebar be sufficient?
Turns out one big thing is simple and cheap roof clips to keep the roof tied to the walls.
/johnny
Better then plain cinder blocks but I don’t think they are as good as solid concrete with rebar inside.
They do use your method here in florida for hurricanes but those aren’t as strong as tornadoes like this one.