The accumulation of water in the side of the wall that is retaining could put stress on the structural strength. If the overturning motion due to the increase in water pressure is greater than the vertical forces that are resisting of the wall, it could be weakened. To stop this, a weep hole is made.

They are small openings with an oval or circular shape designed to eliminate water that is infiltration into the structure via capillary action, leakage or infiltration. They are usually constructed by drainage channels made of sand, which allow them to work properly.

The principal function of a weep hole is relieve the pressure exerted by hydrostatic forces on the wall that is retaining. They also stop water from getting trapped in the walls. To ventilate weep holes permit air to flow through the wall’s back within of the cavity. This can also help reduce the likelihood of dampness and dry rot which is common when moisture is introduced into the unventilated area.

Weep holes are required when in walls of retaining?

If you are creating a retaining wall beneath the water table, then there is an excessive pressure of water in the structure. In this case, you require a weep-hole. This extra hydrostatic pressure is reduced by installing weep holes on the base of the structures.

Weep holes have been drilled on the bottom of walls of retaining. «This is to prevent excessive pressure affecting the integrity of the retaining wall,» says Ruban Selvanayagam from Property Solvers Off Market in the UK.

Their dimensions must be designed with care to regulate the tension on the surface. The amount of weep holes to be drilled in a wall retaining structure is contingent upon the maximum height of water accumulation , or the natural soil water table.

Types of retaining wall weep holes

Open Head Joint Weep Holes

These head joints are placed regularly at the bottom of the wall cavity. They are the simplest type of weep hole you can build. They are positioned within the wall joint that is higher to allow water to drain out just from the point. They also work in removing water from cavities. For this type of hole, a drainage structure is constructed in the area around drainage hole in order to block rainwater and inserts from leaking into the holes.

Cotton Rope Wicking Weep Holes

These weep holes are constructed with ropes less than 12 inches in length. The rope’s one end is put on the joint, while the other extends towards the wall of the cavity. The water coming from the wall’s back is taken up by the cotton and, on the other side, it evaporates.

Tubes Weep Holes

The tubes of the weep hole tubes are made by using hollow plastic or steel tubes, which are separated by 16 inches apartand spaced 16 inches apart. The drain in the pipe is placed at an angle of about a quarter to allow for flowing of the water in the pipe.

Corrugated Channel Weep Holes

Weep holes assist in removing water from the various channels. They are located on the bottom of bed joints on the mortar.