Whether a house sits on a hillside or on level ground, you must first of all slant the soil to lead the water away from the house.
There are three kinds of tiles:
Above ground drainage tiles lead rain water away from the house on top of the ground, e.g. the water coming from the roof.
Below ground drainage tiles are installed about 2 to 4’ below the surface. They are a 4 to 8" perforated plastic pipes which travel across fields at intervals, conducting surplus water into a ditch or county drain.
Weeping tiles are in the ground under the house and lead the ground water into the sewer. Without weeping tiles the ground water pressure would lift the foundation.
Another hint: Never build a concrete sidewalk next to a building. You will need to tear it up whenever you raise the settling soil around the building. Use blocks instead which are light enough to be picked up.
If you have a surplus water, you might consider creating a pond into which you could lead the water from the drainage tiles.
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