The way to Install Foundation Drain Tile
Subsurface water or higher soil moisture in the landscape, as well as runoff from roofs, could threaten to seep through or leak to exposed structures or cause puddling, erosion or other problems in the landscape. One method of safeguarding your basement or crawlspace from moisture and direct excess water off efficiently is to install foundation drain tile along with the construction. Drain tiles are produced from several materials. They were traditionally made from clay, but today most drain liners is perforated PVC or corrugated plastic piping.
Dig a trench beside the construction that is at least 12 inches wide and extends down to the bottom or foundation bottom. Alternatively, if the sole concern is surface water or even water seeping off of their roof edge, excavate the trench to a minimum thickness of 24 inches. Be certain that the trench extends to a suitable outlet like a ditch, swale or pond. Produce a rough slope toward the outlet along the trench bottom.
Pound a stake into the ground at each end of the trench. Stretch a string using a line flat attached between the two bets so it is even, marking the point where the string is flat on the stake nearest the outlet.
Assess the distance between the two bets and calculate the extent that the trench should drop to have a slope of at least 1 percent. As an example, if the distance between the onset of the trench and the outlet is 75 feet, then the trench bottom should decline at least .75 feet, or 9 inches, above the amount of the trench. Measure this distance down to the second bet. Mark this stage and slip the string to the marked point.
Shape the bottom of the trench so that the string rests gently on top of the ground over the entire trench.
Line the trench using filter material or landscape fabric so that it covers the bottom and extends at least 18 inches up all sides of the trench.
Put the perforated drainpipe or tile in the bottom of the trench. Ensure it is centered in the trench with its perforations oriented horizontally.
Place a level on top of the drainpipe in various sections to ensure it still has the slope which was established earlier. Insert or remove soil or gravel below the pipe and landscape material, if necessary.
Cover the pipe with at least 12 inches of clean, coarse gravel or washed river stone. Fold the excess landscape material on each side over the surface of the gravel layer.
Fill the rest of the trench with gravel or other aggregates or soil that has been removed to dig the trench originally.