Page 59

Building Products October 2017

BRICKS, BLOCKS AND PAVING DEALING WITH DRAINAGE Permeable paving provides an inherent drainage system that requires no additional land to be taken for water storage, treatment or conveyance. Chris Hodson explores the advantages of this system, and its cost efficiency benefits. Concrete block permeable paving helps OCTOBER 2017 | BUILDING PRODUCTS 59 meet the latest regulatory requirements for sustainable drainage (SuDS) while cutting costs and maximising development potential. It can also play a significant role in urban design, both as an attractive hard surface and also by providing a gradual supply of clean water for landscape, amenity and biodiversity. SuDS and techniques such as concrete block permeable paving are essential tools in the fight against flooding and pollution – particularly with overloaded sewers, urbanisation and climate change. SuDS are now a firm requirement around the UK and a key consideration in urban and landscape design. It is almost two years since the Government chose to abandon dedicated requirements for SuDS on new developments using the 2010 Flood and Water Management Act. Instead, the National Planning Policy Framework (NPPF) requires sustainable drainage on new developments of 10 or more dwellings (and similar scale commercial developments) in England and SuDS are also demanded elsewhere in the UK. In addition, existing NPPF prioritisation of SuDS in areas of flood risk and requirements that also resisting developers’ arguments against using developments should not make flood risk worse SuDS on cost grounds. There is plenty of evidence elsewhere – effectively by utilising SuDS – still to demonstrate that well-designed SuDS cost no apply to developments of any scale. The onus for more to install or maintain than conventional implementation has now moved to local planning piped drainage, particularly when considered as authorities (LPAs) and local lead flood authorities multifunctional elements like permeable paving (LLFAs) via local policies and planning application within the overall project design. decisions for developments. By its very nature, concrete block permeable New guidelines and policies are gradually paving is ideally placed as an essential, appearing, spelling out what LPAs and LLFAs expect from designers and developers. LPAs are Continued on page 60 >>>


Building Products October 2017
To see the actual publication please follow the link above