Prefabricated modular building

1. A prefabricated building module including a rectangular floor structure, three walls and a trussed roof structure enclosing a space;

the three walls comprised of two end walls pivoted about 90 degrees about the short sides of the floor structure, and a side wall pivoted about 90 degrees at its lower end to a long side of the floor structure; and

the roof structure pivoted about 90 degrees at the upper end of said side wall such that said walls and roof structure fold onto the floor structure to form a flat pack within the same footprint of the floor structure.

2. The module of claim 1 in which the roof structure comprises a

ceiling and upright roof trusses pivoted about 90 degrees to the ceiling which fold down onto the

ceiling to form a flat pack within the same footprint of the floor structure.

3. The module of claim 2 in which the end walls fold down onto the floor, the ceiling folds down onto the third wall, the trusses fold down onto the ceiling and the combination of trusses, ceiling and third wall folds down onto the end walls to form a flat pack within the same footprint of the floor structure.

4. The module of claim 2 in which the walls, the ceiling and the roof trusses have mechanisms which lock them in place when erect.

5. The module of claim 1 in which the walls have provision for doors and windows.

6. The module of claim 1 which is adapted to be used in combination with other modules to form habitable buildings of two or more modules.

7. The module of claim 1 in which the roof structure comprises rigid batten construction.

8. The module of claim 1 in which the floor and roof structure are adapted to form an external verandah.