Abstract: A method of constructing an external weatherpoof wall of a building 1 by way of a series of posts 6, 10 and panels 9. The method involves orienting a post 6, 10 vertically between the roof and wall and securing it in place. A panel is then oriented vertically and moved against the post. A further post is placed against the free side of the panel and the procedure repeated until a wall is established panel after post. The wall can be disassembled without the application of destructive force. Preferably only the posts are bolted to the roof and floor and the panels are held between the posts without receiving fixing means such as screws, bolts, or the like to hold them there.

Abstract: A portable building has a first side wall 1, a second side wall 2, a pair of end walls 3 and 4, a floor, and overlapping roof parts 5 and 6. The first side wall 1 is able to move in a direction away from the second side wall 2 with the result that space within the building is substantially increased. The building is formed such that as the first side wall 1 moves the overlap between the roof parts 5 and 6 reduces so as to accommodate the increased space within the building. Movement of the first side wall 1 creates substantial wall openings between the first side wall 1 and the end walls 3 and 4. The openings are closed off with doors, a panels, windows, or any combination of these, in each case made to match the wall openings.