Ecobase Porous Pavers for Paths & driveways 50m2 Paving, Black, Covers 50 square metres, eg an area measuring 5 x 10m or 2.5 x 20m

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Capital Regional District, British Columbia (2007). "Regulating Stormwater Discharges". www.crd.bc.ca. Archived from the original on 2007-07-12 . Retrieved 2023-01-29. Installation of porous pavements is no more difficult than that of dense pavements, but has different specifications and procedures which must be strictly adhered to. Nine different families of porous paving materials present distinctive advantages and disadvantages for specific applications. Here are examples: After digging out, a weed mesh or geotextile membrane should be laid to prevent any weeds growing up and through from the soil below, but also to bind the sub-base above it, which stops it sinking into the soil. As such membranes are porous any water will be able to pass through it easily. Permeable pavement can help reduce the adverse effects of impervious surfaces. Porous pavement can help reduce the negative impact of impervious surfaces. Permeable pavement can reduce the concentration of pollutants by trapping them physically, chemically, or biologically.

Consequently, many planners, local authorities and developers are now giving serious consideration to the use of permeable paving systems, as they can be more cost-effective than traditional collection and dispersal systems and offer significant environmental advantages, such as natural breakdown of pollutants, replenishment of aquifers, and the possibility of water harvesting. The advantage of a soakaway is that it is relatively cheap and easy to construct and can, in the right conditions, absorb significant amounts of excess water. The solution is to use a sub-base that has been “open graded” so that there are none of the finer particles that stop the water flowing through. With only the larger aggregates it must be compacted in the same way but the holes between the particles will remain and allow any water to pass through. The pavement surface can be jet-washed or flushed to help maintain surface porosity. Be careful of high-pressure washing Designers developed porous paving systems so runoff would pass through the pavement into a stone base and into the soil to replenish groundwater supplies. With proper installation and maintenance, permeable paving allows for infiltration of up to 80% of annual runoff volume.The choice of materials, styles and finishes for such hard standing surfaces is huge, with a finish sure to suit any tastes. Description and applications [ edit ] Grass pavers being used for a permeable driveway in the Netherlands If you have a clay type soil which does not readily absorb water then extra work might be required to ensure that the water does not soak through the drive surface and simply sit in a “puddle” in the sub-base. It might be necessary to have a pipe in the sub-base to take excess water to your water drainage system for the rest of the house.

Grass can also be used as part of a permeable paving solution. A grid system is typically used to protect the grass roots and maintain the structure of the surface, while still permitting water to percolate through. With Infiltration systems, the top 15-25mm of the voids has a tendency to self-seal with washed-in organic matter, muds and silts. This phenomenon obviously reduces the potential drainage capacity of the system. On the continent, engineers conservatively assume a reduction in the potential drainage capacity of a permeable pavement to around 10% of the theoretical maximum and so, additional run-off drainage is provided to cope with periods of exceptional flow. Longer-term research shows this 10% value to be somewhat pessimistic and although there is a measurable reduction in performance over time, the actual reduction does seem to stabilise in a period of 3-6 years to a value between 10 and 20%. Whilst we are aware that some customers have experienced challenges with some lenders, this is not the case with all lenders provided that the correct installation documentation is in place.Research has identified permeable pavements as “cool pavement technology.” Due to their high air-void structure, porous asphalt can mitigate urban heat island effect by reducing stored pavement energy and allowing rapid cooling via evaporation. Being lightweight, the pavers are easy to lay and once down can be filled with aggregate, gravel, soil and grass seed or mulch. Weaker –it is true that a porous material may be weaker than non-porous options, however, most last upwards of 15 years, so the shelf life is still impressive. All these solutions can deal with either the excess water from a permeable driveway, or they can be used with a traditional drive construction. All the runoff water should be channeled to them to be absorbed or removed, meaning that it does not end up in the drainage system.