base building concrete concrete-pad concrete-pour concrete-work concreting construction edged edging fill filling flat flatten flattening form forming foundation foundational gray grey level leveled leveling levelled levelling mix mixed poured preparation prepared preparing rough smooth smoothing solid solidify spread spreading strength strong sunlight surface surfaces textures tools wet work working abstract architectural background barrier basic brick brick-wall bricks brickwork building-material colored coloring colors coloured colouring colours composite constructed exterior external fading firm linear lines mortar old partial partially-painted perspective secure security standard style symmetry texture textured uneven varied various wall white blue