ancient background house construction element old roof roof top architecture closed concrete construction decay dirty element elements house urban wall weathered window windows wooden blue glass building ceiling clear geometric glass glass house greenhouse steel top transparent angles bricks brickwork building-construction building-site building-work construction-site construction-work development exterior external framed frames home home-units light linear lines metal metal-work modern perspectives sky straight structure style suburban views walls window-frames buildings cement-mixers equipment framework homes materials men mixers pipes sand supplies units work workers workmen accommodation rubble safety untidy box-like boxed concrete-slabs concreting distinctive gray grey modernistic plain prefabricated slabs solid squared structured