Concrete garden walls are usually built then, when it is difficult to obtain natural stone of the right quality, when the created wall must be given high strength and then, when a special type of cladding is envisaged. Concrete walls are made of high-strength gravel or crushed stone. To increase endurance, walls of greater height are reinforced with steel rods. Concrete walls must be made in one-sided or two-sided formwork. When laying concrete, remember to leave holes for water drainage from the drainage layer and holes for plants, which can be planted on their surfaces. In places of the designed openings, it is best to place polystyrene pieces of appropriate size, which can be easily removed after the formwork is removed.
After striking, concrete does not generally have an aesthetic surface, that is why it is most often refined. The most common processing methods are as follows:
- machining, like for example. bush hammering, chiselling;
- covering the surface with a specially selected aggregate on a cement mortar, with leaching of the mortar after it hardens;
- laying on the surface covered with cement mortar sorted natural aggregate with coarse grains;
- laying natural or artificial stone panels of various thickness and shapes on the cement mortar;
- the use of special formwork that allows the surface to be formed in various ways.
The most aesthetic, but at the same time, mosaic tiles are the most expensive, in which the arrangement of the plates, their sizes, proportions, and even the color and shades are designed in great detail, and then performs exactly according to the working drawings.
Sometimes the brands of concrete laid in the formwork can be replaced with specially produced prefabricates. Low walls made of such elements can be used for sitting.
Some of the prefabricated elements are made of reinforced concrete, and such, thanks to their high strength, can act as retaining walls. The surfaces of prefabricated elements forming the façades can be finished in various ways. The advantage of such elements is the ease of their positioning and the elimination of time-consuming works related to the execution of formwork and concrete laying. Building retaining walls from prefabricated elements can be largely mechanized.