Retaining Wall Drainage Material
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Good drainage and compaction will add to the quality and performance of your finished wall.
Retaining wall drainage material. Avoid having downspouts pointed at the retaining wall and if it s against the house keep soil and mulch well below the siding. Walls fail because the builder did not use enough class 5 fill. A retaining wall is commonly used in landscaping to either make better use of a slope or create a decorative statement. Crushed or smooth stone well graded compactable aggregate ranging in size from 0 25 in.
6 to 38 mm is the ideal wall rock size. The design of a properly built retaining wall resists the force of the soil behind it and prevents caving buckling or leaning. Why proper drainage is important for retaining wall performance. Follow the block manufacturer s instructions for wall height limits.
Without the right amount of base material water builds up underneath the wall and pushes the base layer out. By definition a retaining wall is a structure that is used for supporting the soil mass laterally so that the soil on different sides of the wall is retained at. Retaining walls also fail because the base layer was not leveled properly. An unlevel base layer allows areas for water to wash away certain sections more than others.
However retaining walls are built with a certain capacity in mind. We refer to the material used for the base within and behind the block as wall rock. A retaining wall is built to hold back a certain amount of soil.