Leaning Basement or Retaining Walls
Due to the weight of the earth on the outside of the wall and the
pressure it creates, many retaining walls and basement walls start to
lean, bow, or crack over time. Because a leaning, bowed, or cracked
basement wall can no longer effectively support the weight of the house
above it, the problem must be addressed. To fix the problem, horizontal
tiebacks or wall anchors are installed to pull the wall toward the
earth behind it.
These devices usually consist of some type of anchor in the earth, a
plate on the inside surface of the wall, and a rod connecting the two.
Helical screw anchors and plate anchors are two common anchor
varieties. For plate anchors, a hole is dug in the earth a number of
feet from the wall. Then, the rod is drilled through the wall and the
earth until it reaches the hole. The plate anchor is attached to the
end of the rod in the hole, and the hole is refilled and compacted
For helical screw anchors, a hole is dug in the earth directly
behind the wall. The rod is extended through the wall and the helical
screw head is attached. Then, the entire assembly is slowly turned deep
into the earth behind the wall.
After either the anchor plate or helical screw is firmly in place,
special plates or brackets are installed and tightened on the other end
of the rod to pull the wall toward the earth behind it.