The Amazing Expando House - with Video
Slide away: how the design works
1 At the press of a button, four 24V electric motors powered by car batteries start up, and the 20-ton “shell” – 52ft long, 20ft wide and 23ft high – moves in either direction 104ft along a pair of concealed rails
2 There are three options (see pictures, top left). The shell can slide forward as a shady canopy; retract right back, covering the annexe and yard, leaving the bathroom open to the sky; or stop halfway, covering the bathroom but revealing the conservatory
3 For safety reasons, there’s always an exit in case the mechanism jams. As one door is closed off, another opens
