Agenda item

6.1  Dave Markham, head of major works, reported the conclusions of the Arup inspection of the Four Squares estate.  On 7 November 2012 tenants and residents had been informed that the estate was structurally sound and in good condition for its age.  Arup would provide options to resolve the problems with the brickwork and the contractor Apollo would confirm a price.  Officers hoped to contain these within the current £19.1m build cost.  Members stressed the importance of keeping within this figure, particularly in view of the impact on leaseholders’ bills.

6.2  In response to questions, the head of major works explained that Arup had asked the council to identify similar blocks within the borough for further inspection.  Officers believed that not all of these would have the problems of brick slippage.  The head of major works stated that there were a range of possible options, including different forms of cladding and tying back brickwork, which would prevent similar problems in future years.  In response to further questions he stated that Arup were working with Apollo on core sampling in order to determine the extent of deterioration of the concrete.

6.3  The head of major works confirmed that Arup had undertaken a geotechnical survey to ensure that neither the Jubilee Line nor underground ponds and rivers were affecting the estate.  The buildings were on piles that went down to good solid ground.  In response to questions about why problems had occurred now, the head of major works commented that these could have happened at any time and in any area.  Over the years, brickwork and concrete expanded and contracted at different rates and adhesion of the brickwork altered.

6.4  The head of major works reported back the strategic director of finance & resources’ response to the committee’s previous concerns about the appointment of Arup.

6.5  A member was concerned as to whether the council had involved its insurers.  The head of major works indicated that no claim could be made currently and that the insurers had been taken off notice in respect of any major structural risk.