High performance Sika-Trocal Type S and Type SGmA membranes were installed at the Park Plaza Riverbank in Central London to ensure the hotel’s multi-million pound extension and reconfiguration is completed on time and to the highest standard.
Located on the South Bank of the River Thames, within a short distance of Big Ben and the London Eye, Park Plaza Riverbank welcomes guests from all over the world. As part of a European development programme by parent company PPHE Hotel Group an eight-storey extension complete by 2016 will add 184 new rooms and a new private penthouse with terraces to the hotel.
Working with ESA architects and Gear Construction, the design includes the creation of eight separate roof areas of different sizes, shapes and pitches.
Due to the city centre location, two roof pitches of 25° and 44°, and both the complexity and number of roof sections, a forward-thinking application method was required. ICS Roofing was appointed as the project’s roofing contractor, using specialist Sika-Trocal installers Brightside Roofing to complete the application over a projected 18 week period.
Brightside installed a total of 1,755m2 of the Sika-Trocal Type S roofing membrane across the three main roof areas. Using the unique Sika-Trocal Laminated Metal Discs and thermally broken fasteners, this provided a rapid and economic roofing solution by allowing ICS to secure both the membrane and the insulation in one go, reducing the fasteners required by 40-60% and speeding up installation.
The unreinforced nature of Type S membrane offers exceptional malleability and allows high quality detailing works to be completed to an exceptional standard. On the 44° pitched roof, insulation was cleverly installed in a step formation to allow installers safe and easy access to the highest point of the roof – with the membrane allowing a single continuous application towards a stunning box gutter and parapet detail.
“Due to the complexity of the roofs and with health and safety absolutely paramount, it was imperative that the roofs were correctly designed and secured to resist wind loads, ensuring outstanding performance and longevity,” said Tom Peach, Contracts Manager at ICS Roofing.
As part of the overall application, ICS Roofing appointed Eco Green Roofs to complete the installation above 227m2 of Sika-Trocal SGmA membrane. The system was overlaid with sedum matting to create a living roof area and improve the roof’s thermal performance.
The garden roof systems are compatible with all existing membranes and once installed, will extend the life of the green roof, help reduce heating and air-conditioning costs and even water sewage charges. The living roof system consists of everything from traditional sedum mats, drainage layers and edge trims, to security railings and harnesses.
With low environmental impact a key factor on site, ICS utilised a complex array of insulation ranging from flat board and tapered to new ultra-thin vacuum insulation panels (VIPs). Installed on a series of four terraces, 100m2 of the highly innovative new VIPs were used to overcome the common on-site challenge of door threshold heights.
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