Construction Plans & Techniques for Retaining Walls for Patios
- Patios are constructed as surface, below grade or raised structures. Usually the site topography dictates the choice, although in some cases site work is engineered to create the difference in levels. When the patios are above or below the ground, retaining walls are needed to retain the soil and create a level surface for the patio. Retaining walls may be formed in a range of geometric or curved shapes, depending on the material used to build them.
- Retaining walls enclose and define the patio area. A patio will require low retaining walls in most cases; they can be used for seating when they're above the patio surface -- but not too far above. When viewed from the patio, low retaining walls allow visual connection with the surrounding landscape. Higher walls increase the sense of enclosure; where privacy is an issue, lattice or fences can be installed on top of the wall. Incorporate steps into the design to transition from one level to another.
- Choose compatible materials for the structures. Hard landscape materials can dominate the site visually. Use contrasting or complementary materials; for example, brick or wood warm the harshness of concrete. Keep the material palette limited to two or three to avoid a cluttered visual effect or use the same material with contrasting finishes or edges. The materials need to be structurally sound as well to function properly and last a long time. Use the strongest material for the retaining wall.
- Proper construction techniques are essential for a successful project. Retaining walls require structural design that will withstand the lateral pressure of the soil they retain. Site preparation is key to the durability of patios; the subgrade needs to be well drained and compacted to prevent settling and disturbance to the paving material. Retaining walls are generally first in the construction sequence; they establish the boundaries and levels for the patio.