structural elements
Guidance on inverted roof systems released An insight into the latest guidance relevant to inverted roof systems has been released to aid designers, specifiers and installers in their deci- sion making. The summary, which has been made available at
www.styrofoam.co.uk by Dow Building Solutions, provides highlights of three key documents relevant to inverted roof design in one, easy to use guide: • European Technical Approval Guidance 031 (ETAG 031), which was issued at the end of 2010 to help ensure consistent standards of assessment of inverted roof systems.
• BBA Information Bulletin No. 4, which empha sises the need to adjust calculated U-values to take account of the cooling effect of rainwater, as well as the importance of correct drainage.
• BBA DataSheet No. 40/10, which describes the methodology to be adopted when analysing the results of thermal conductivity testing of insulation materials to determine a declared thermal conductivity value (λD).
Sureclad ceramic granite cladding specified at hotel
When careyjones chapmantolcher, Leeds, specified Sureclad ceramic granite ventilated façades for Chesterfield’s new £20 million Casa Hotel, the off-site prefabrication, speed of installation and lifetime maintenance costs of Shackerley’s system were every bit as important as the building’s final appear- ance. Façade panels cut and prefabricated in Shackerley’s ISO9001 quality certi- fied production facilities, were delivered safety meshed, pre-drilled and with preformed straps attached by a patented undercut stainless steel anchor system. Associate architect Paul Cowlin-Chelin commented: “The Sureclad system was installed quickly and gave us a trouble-free interface with the curtain walling and glazing systems. We hid various services from view in the cavity behind the façades and installed Kingspan rainscreen boards to improve the thermal insula- tion of the building. Ceramic granite is exceptionally hard and totally impermeable so it won’t degrade or lose its looks, no matter how extreme the climatic condi- tions, UV-light intensity, and pollution.”
History protected at Oxford University Prater has installed a high specification large scale roofing system, in conjunction with Sika Sarnafil, on the new state-of-the-art Bodleian Book Storage Facility for Oxford University in Swindon. Working closely with supply chain partner Sika Sarnafil, Prater installed 10,000sqm of the Sarnafil single-ply
roofing system. This was laid over insulation and a vapour barrier fitted to the metal deck of the main chamber roof to prevent water ingress, while reducing condensation and energy loss. Air leakage testing on completion gave the build- ing an outstanding result of 1.6m3 minimum requirement of 10m3
/(h.m2 /(h.m2 ) – far exceeding the building regulations ) @ 50 Pa.
Icynene’s soft foam insulation reports success
Soft foam is one of the fastest growing insulation materials in the world today. Icynene’s water blown insulation gives off no harmful emissions, offers dramatic energy savings, enables better indoor air quality and affords reductions in CO2 emissions. In a recent project, owner Les Ansell commented, “Having installed Icynene, the building now holds the heat at a constant temperature regardless of weather conditions. If the wind blows it has no effect on performance. The building is warm, draft free and comfortable, and installing Icynene has resulted into substantially lower fuel bills.” Founded in 1986, Icynene is one of the largest suppliers of soft foam insulation material in North America and has participated in over 300,000 health, environmental and energy efficient building projects across the world. Applied as a liquid, Icynene expands to 100 times its volume in seconds to fill every crack and crevice while remaining flexible so that the integrity of the building envelope seal remains intact over time. Icynene is also extremely popular with designers as it enables them to explore geometry and space without compromising performance.
t 01380 730 668
www.icynene.com
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www.buildingconstructiondesign.eu Glazing replaced throughout Court Centre
A £1.6 million contract at Portsmouth Combined Court Centre to replace all the existing glazing with high specification, solar control Pilkington glass has been completed by Structura UK Ltd, curtain walling specialist. The work was under- taken in 3-phases over 15 months on the 4-storey, 1970s brick-built building. Over 340 vision panes and more than 450 spandrel panels were manufactured and installed by Structura UK after the original glazing was found to have come to the end of its useful life. Responsible for external scaffolding and on-site health & safety, Structura UK, principal contractor, ensured a tight sequence of replace- ment was strictly adhered to so that at all times the building was watertight and secure. A considerable improvement in acoustic performance for the Centre has been achieved by the double glazed vision panels. Structura UK ensured an EPDM membrane was fully bonded around the perimeter of each window and fixed to the substructure.
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