Specializing in: - Topsoil - Sand & Gravel - Fill Contractors - Plumbers - Excavation Contractors - Building Contractors We pump and sand dry under your home; slab or raised. Dry sand is cleaner and has a larger grain than sand that is pumped wet. The larger grain enables the san to pack very tight lasting longer than wet pump. We pump to the bottom of the slab; wet does not. Water caused the problem, WHY ADD MORE?