French Drain

• Many homeowners install French drains to remove water from basements. This method involves excavating a trench around the perimeter of the basement. The installers must place square drain tiles below the concrete floor and parallel to the foundation's footing. A vapor barrier attached to the wall directs the water to drain tiles. This keeps the basement free of moisture that creates mildew and mold. In addition, a French drain moves water from underneath the concrete slab and guides it to a sump pump. The pump sends the water to the exterior.
  
  

Damp Proofing

• Installation of waterproofing on the exterior can take two forms: damp proofing and waterproofing. Damp proofing entails spraying a layer an asphalt-based coating on the buildings foundation wall during the construction process. The asphalt alone does not stop water or moisture vapors; however, the asphalt coating does slow the penetration of water and vapors through the concrete walls. A more expensive variation on the above technique attaches fiberglass drainage boards over the coating, which helps drain water away from the foundation.
  
  

Water Proofing

• The waterproofing works for new construction or as a repair application. This method requires full excavation around the exterior perimeter of the foundation wall. The installers spray a polymer sealer on the wall's surface. Next, they attach a dimpled membrane material. The membrane waterproofs the foundation wall and guides the water to a 4- to 6-inch perforated drain. The drain runs along the foundation's footing. The installers cover the drainpipe with a layer of clean stone and soil that slopes away from the structure.
  
  

Sump Pump

• Many homes have sump pumps installed as the primary protection against a flooding basement and water drainage. The pump drains water, which collects in the sump basin, to the exterior of the building. This system works by a float mechanism that signals the pump to turn on and off as required. The float activates by a mechanical, pressure, tethered or electronic switch.
  
  When selecting a sump pump, purchase a unit that has a high quality switch with a backup or dual switch. Often, when a sump pump fails, the failure occurs due to a faulty switch. In addition, choose a high performance pump that has the correct size for your needs. The installer or supplier can help to size the pump for your needs.