Interior Drain Tile System
The most effective of the interior drainage systems is a perforated drain pipe installed inside the perimeter of the footing. This requires removing and replacing concrete at the slab edge. By placing the drain pipe beneath the slab, it drains the area to a lower level. Similar to an exterior system, the drainage pipe connects to a sump crock. The sump should have an airtight, childproof cover.
The most effective of the interior drainage systems is a perforated drain pipe installed inside the perimeter of the footing. This requires removing and replacing concrete at the slab edge. By placing the drain pipe beneath the slab, it drains the area to a lower level. Similar to an exterior system, the drainage pipe connects to a sump crock. The sump should have an airtight, childproof cover.
Exterior Drainage System
Installing an exterior drainage system is one of the most effective water control approach. This requires digging up the area around the foundation and rebuilding it similar to a new house installation. It also requires digging up shrubs and other obstacles around the house.
Usually, waterproofing and insulation are installed at the same time, in addition to making any repairs to the structure. The exterior drainage systems use #1 wash stone as the backfill. Drain tile is placed beside or on top of the footing. We backfill with wash stone to within 2-3 feet of level ground. Final fill consists of topsoil which will then be raised to approximately 6-8 inches above level ground from the foundation. This allows proper water shed of ground water.
All exterior drainage systems drain to a sump that can be pumped out. The sump must have a airtight, childproof cover.