Downspout Drain Systems

Here is a realistic and inexpensive way to take care of roof drainage water. It's not fancy, but it tends to work as well, if not better, than the expensive interior or exterior perimeter drain system.

I have seen this type of system make a dramatic difference in most existing homes with wet basements. It is of greatest value when it replaces old concrete or clay in-ground drain systems, where an off-site system in not available or in homes without any downspout drain system.


  • Here is a good example of the type of excavation required for an on-site downspout drain system. The actual hole - the energy dissipation basin or "French drain" - must be at least 8' away from the foundation and the trench for the drain line must slope down and away from the house.

    Once the filter cloth, gravel and drain tile is installed, the sod can be re-installed on a layer of filter cloth.

    Drain excavation
    Drain excavation
  • Corrugated drain tile has two advantages: price and length (250' rolls). However, this material tends to collapse easily and is harder to clean. Solid 4" plastic pipe tends to be a much better product. Since much of the cost in installing this typ