Method of constructing a building

A method of constructing a building comprising:

• providing an outer bag of flexible substantially airtight material, with a closed bottom and walls that curve inwardly to a neck with an inlet at the top;
• supporting the outer bag upright with its bottom in contact with the earth;
• pouring structural material into the bottom of the outer bag to define a floor;
• lowering an inner bag through the inlet after the structural material of the floor hardens, the inner bag being of flexible substantially airtight material with a closed bottom and walls that curve inwardly to a neck with an inlet at the top;
• pouring a liquid into the inner bag to a selected level so that the bottom of the inner bag is supported on the floor;
• then
• pumping air into the inlet of the inner bag to inflate the inner bag, the inner and outer bags being dimensioned so that when both are inflated, a space exists between the walls of the inner and outer bags;
• then
• pouring structural material into the space between the inner and outer bags to define the wall and roof of the building when hardened, while air pressure is maintained in the inner bag;
• then
• releasing the air pressure inside the inner bag;
• removing the liquid from the inner bag;
• and
• removing the inner bag.

A method of constructing a building, comprising:

• providing an outer bag and an inner bag, each bag being of flexible, substantially watertight material with a closed bottom and walls that curve inwardly to a neck with an inlet at the top;
• excavating a basin in the earth;
• supporting the outer bag with its bottom in contact with the basin and its inlet above the earth's surface;
• pouring structural material through the inlet of the outer bag into the bottom of the outer bag to define a floor with a flat upper surface when hardened;
• supporting an equator bar horizontally above the floor and inside the outer bag so that it defines the perimeter of the building, and securing the outer bag to the equator bar;
• lowering the inner bag through the inlet of the outer bag and inflating it with its bottom surface on the floor, after the structural material of the floor has hardened, the inner bag being of lesser dimensions than the outer bag, defining a space between the walls of the inner bag and outer bag when both are inflated;
• pouring water into the inner bag to a selected level;
• locating a template in the space between the walls of the inner bag and outer bag of dimensions that of a desired opening, the template fitting tightly between the walls of the inner bag and outer bag to prevent the intrusion of structural material into the area that it defines;
• pouring structural material through the outer bag inlet into the space between the walls of the inner bag and outer bag to define a first wall portion of height selected so that the hydrostatic pressure of the structural materia while pouring is less than the hydrostatic pressure of the water at the same level;
• pouring structural material through the outer bag inlet into the space between the walls of the inner bag and outer bag above the first wall portion, after the first wall portion has hardened, to define the walls and roof of the building, while maintaining a positive air pressure inside the inner bag;
• removing the water;
• and
• removing the inner bag after the structural material above the first wall portion has hardened.

A method of constructing a building comprising:

• providing an outer bag of flexible substantially airtight material, with a closed bottom and walls that curve inwardly to a neck with an inlet at the top;
• supporting the outer bag upright with its bottom in contact with the earth;
• placing a structural material means into the bottom of the outer bag for defining a floor;
• lowering an inner bag through the inlet, the inner bag being of flexible substantially airtight material with a closed bottom and walls that curve inwardly to a neck with an inlet at the top;
• pouring a liquid into the inner bag to a selected level so that the bottom of the inner bag is supported on the structural material means;
• then
• pumping air into the inlet of the inner bag to inflate the inner bag, the inner and outer bags being dimensioned so that when both are inflated, a space exists between the walls of the inner and outer bags;
• then
• pouring structural material into the space between the inner and outer bags while air pressure is maintained in the inner bag;
• then
• releasing the air pressure inside the inner bag;
• removing the liquid from the inner bag;
• and
• removing the inner bag.