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RETAINING WALL WEEP HOLERETAINING WALL WEEP HOLES APPEAR INADEQUATE / NOT PROVIDED: Weep holes in retaining walls are extremely important because they help relieve the excess moisture from the soil behind the wall. Excess moisture causes the soil to "push harder" against the wall and can in extreme cases cause the wall to crack or even topple. Keep existing weep holes cleared. Some weep holes appear to be places where grout is missing between the blocks (if it is a block wall) New weep holes may have to be provided. Drilling through the wall with a special drill, sometimes referred to as a "roto-hammer," which can be rented from almost any Rental Yard, is one way of providing weep holes. These holes are ordinarily 1 to 2 inches in diameter, are placed as low on the wall as possible and are spaced at least every 24 to 36 inches horizontally and in one or two rows There are other ways to provide proper drainage behind a retaining wall and your particular wall may be so provided. This item is marked when the inspector cannot readily see the method of moisture relief. You are advised to continue to investigate the method, if any, by contacting previous property owners and/or the Building Department in your municipality Contact a Concrete Contractor who specializes in retaining walls and/ or bulkheads for additional information and assistance if necessary.
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