Tips for water-permeable paving stones

Until a few years ago only grass pavers were known as water-permeable paving. At the latest after the changes in the legislation regarding sealed floor surfaces, water-permeable paving stones moved into the consciousness of architects and builders. Manufacturers and industry developed products that should replace conventional gutter technology. These include plaster bandages, which can dissipate extra water through extra-wide joints, but still have a navigable stability. Alternatively, conventional concrete paving stones were provided with holes that allow water to seep through several holes per paving stone. Both solutions, however, are valued in the current Wastewater Ordinance as the sealing of areas and the amount of infiltration per square meter is defined and calculated as waste water. Also paving stone associations with recesses such as cut corners or wing-shaped paving stones with larger joint surfaces count as a seal.

Special material composition leads to Sickerstein

The ingredients of the concrete paving stones are assembled in modern seepage or eco-paving stones in such a way that every stone on the whole surface lets the water seep through. The concrete is poured into large pores by adding small beads that keep small infiltration channels open in the concrete. This concrete structure is called haufwerksporig and has limits in their resilience. On busy cobblestones, the pores build up over time and block water permeability. For driveways, sidewalks and garden areas, the water-permeable paving stones are ideally suited and maintain their ability to infiltrate for a long time. When using water-permeable paving stones, the proper substructure is particularly important. The Ausköseung, ie backfill, under the pavement surface must be at least fifty centimeters lower than that of conventional paving. If the surrounding soil is water impermeable, for example due to high clay content, a drainage pipe system must be installed.

Product variety is big, but smaller than for conventional concrete

Almost every manufacturer has a product line of seepage or eco-stones on offer, which are also referred to by the additional term drain. Compound stones such as bone stones move priced between twelve and twenty euros per square meter and also rectangular or square water-permeable paving stones move in this price range. Special manufacturers offer the largest selection of Sickersteinen. A good example can be found on the Internet at ehl.de. Some concrete manufacturers such as feiter-beton.de have a particularly large range of eco-products in the program.

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