Digging or casting foundations is time consuming, but the earthworms allow you to prepare the bases for a pergola , a fence or garden house clean, fast and cheap. Simply screw the screw simply into the ground and fasten the top of the fence, pergolas ... And you're done.
Earth screws are an economically advantageous investment compared to conventional concrete. The bases of arbors, fences, woodcutters and other light structures on earth bolts can be built in one day. Using the earth screw does not produce any construction waste. No heavy equipment or access to the electrical network is required for installation. Lifetime is at least 50 years, warranty 2 years.