LANDSCAPING & EXTERNAL WORKS Solving permeability problems
Duncan Andrews of SureSet looks at how cellular paving systems can offer the ideal solutions for SuDS requirements, in particular in sites with restricted space
systems being brought to the market. Often it’s not the top surface that restricts permeability but the sub bases beneath it that ends up being the most restrictive factor. Some of the most widely available sub bases come from variations of asphalt and concrete, where the manufacturer will remove ‘fines’ from the mix and increase the ratio of larger aggregate particles to create a product with small voids, in that allows water to pass through in much the same way that resin bound paving performs.
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For most applications this type of sub base is the best performing and most cost effective option when specifying permeable paving areas, but what about those projects with heavily restricted access such as roof terraces, courtyards or pathways between buildings, and those areas that require special attention such as tree pits and tree protection zones?
Cellular paving is a rapidly expanding paving option due to its relatively low cost and simple installation process requiring minimal
specialist tools and its low skill installation process
Cellular grid structures offer strong, free draining and eco friendly solutions for areas with special requirements and are available in a wide variety of depths and materials. Once laid they can be filled with a crushed and compacted aggregate or, in certain applications, a soil/planting mixture and sown with grass seed. This can then be left exposed as a finished surface, or used as a sub base to then install a permeable wearing course
ADF JUNE 2019
WWW.ARCHITECTSDATAFILE.CO.UK
ermeable paving solutions are a hot topic at the moment with an ever increase range of products and
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