Rock lays claim to the Square Mile’s largest green roof

Each month we update this website with case studies which illustrate Rock’s impressive range of  waterproofing systems, traditional roofing skills and renewable energy technology. It’s a year since we added Cannon Place to the Infrastructure section of our Project Gallery, but we’re throwing the spotlight once again on this landmark building in the heart of London’s financial district. The reason? We have learnt that its green roof, which was delivered by Rock, is now recognised as the largest in the City.
But size isn’t everything. It’s great to be the leader in terms of scale, but Rock places just as much importance on retaining the top spot in terms of the quality of our design and installation.

Cannon Place is a mixed use scheme on a brownfield site above a major transport interchange. Its environmental impact was always a key consideration for Hines, the developer. As a result, main contractor Laing O’Rourke appointed Rock to deliver an inverted waterproofing system combined with an extensive green roof. To help mitigate the urban heat island effect and encourage the biodiversity of the City’s environment, Rock created a sedum blanket roof which could be home to indigenous herbs, grasses and wildlife.

Today, Rock is undertaking another large-scale bio-diverse roof, this time for Westfield Stratford City adjacent to the site of the London 2012 Olympic Games. Covering an area of 10,000 sq m, this ecological brown roof will provide a habitat to support flora and fauna and reduce rainwater run-off. It’s the latest example of why so many clients trust Rock to design, supply and install even the largest and most complex bio-diverse roof systems.