Exteriors


The future is permeable


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ew legal requirements for Sustainable Drainage Systems (SuDS) on developments across Wales apply


from January, heralding wider use of concrete block permeable paving. Meanwhile, the trade association Interpave has published the new Edition 7 of its definitive guidance to this essential SuDS technique – ‘Design and Construction of Concrete Block Permeable Pavements’ – now available to download from www.paving.org.uk. The Welsh Government has now implemented Schedule 3 of the 2010 Flood and Water Management Act. This includes the establishment of a SuDS Approving Body (SAB) within each local/unitary authority, alongside its lead local flood authority duty. SAB approval will be required before construction of drainage systems can commence on new and redeveloped sites. The Welsh National Standards point out


that: “The SuDS approach mimics natural drainage, managing surface runoff at or close


to the surface and as close to its source as practicable, controlling the flow… and providing a range of additional benefits.” By its very nature, concrete block permeable paving is uniquely placed to meet these requirements, as an attractive, surface-based, multifunctional SuDS technique. Interpave’s new ‘Design and Construction


of Concrete Block Permeable Pavements’ guidance covers the most recent permeable paving techniques, such as overlays to existing


road constructions and enhanced, predictable water storage using flow controls. It can be downloaded from Interpave’s new website www.paving.org.uk – an essential resource covering all aspects of design with precast concrete paving, including an inspirational project gallery and case studies, supported by background information for all design stages, as well as for CPD.


0116 232 5170 www.paving.org.uk


Schöck Isokorb for largest UK Passivhaus development


project, Agar Grove Estate is undergoing a major regeneration, due for completion in 2025. It will deliver 493 high-quality homes for existing residents, with ground floor maisonettes and apartments above with full width balconies. As the project is to Passivhaus standard, the


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high levels of insulation mean exceptional levels of airtightness; and a critical requirement is the avoidance of thermal bridging. A frequent cause of increased heat and energy loss, condensation and likely mould growth. The risk of thermal bridging is at


connectivity points involving the balconies and parapets. And one of the most effective countermeasures is the Isokorb range of structural thermal breaks from Schöck. The Isokorb type used for the balconies has been awarded the “low thermal bridge construction” certificate by the Passivhaus


laimed to be the UK’s largest Passivhaus development to date and Camden Council’s largest community


its 120mm insulation dramatically reduces heat loss.. Also there is no risk of any additional thermal bridging through balustrade fixings, it requires no maintenance and no expensive restoration due to waterproofing problems. In addition to the Isokorb types used at


Institute in Darmstadt and transfers both negative moments and positive shear forces. The conventional insulation method for parapets is to wrap the perimeter of the wall with an insulation barrier. However the Schöck Isokorb designed for parapets avoids the need for wrapping. It is more cost-effective than conventional wrapping and


Agar Grove, the comprehensive Schöck range also offers solutions for concrete-to-steel and steel-to-steel situations. When any Isokorb product type is incorporated into residential buildings, the required fRsi value is always comfortably met. Products meet full compliance with the relevant UK building regulations, have NHBC approval and offer LABC Registration. There is also the security of independent BBA Certification. Contact Schöck or visit the website for a


free copy of the Schöck Thermal Bridging Guide; the Schöck Specifiers Guide and to view the full range of downloadable software.


01865 290 890 www.schoeck.co.uk


www.buildingconstructiondesign.co.uk


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