Backflow is a plumbing term that refers to the pollution of a clean water line by contaminated water flowing in the reverse direction
Pavement, in construction, is an outdoor floor or superficial surface covering
Retaining walls are structures designed to restrain soil to a slope that it would not naturally keep to (typically a steep, near-vertical or vertical slope).
Concrete pavers are a very popular building material used to pave driveways, walkways, patios, and other surfaces.
Maintaining gardens and flower beds. Mowing grass. Seeding and fertilizing lawns. Trimming hedges and trees. Performing routine checkups on clients' yards.