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planning & design; structural elements


becoming more and more stringent. As a result, thermal bridges are becoming an increasingly sensitive area and to meet the specific needs of architects and energy assessors Schöck has launched a free internet-based system for real-time calculation of various thermal technology criteria at www.psi.schoeck.co.uk. The calculator enables substantiated thermal bridge analysis in just five simple steps and it can be printed out immediately. Based on the construction details, the new


Thermal bridging calculator available online I


n respect of the overall energy efficiency of new buildings, the Approved Document Part L1A and L2A and further BS regulations are


considered. If all minimum requirements are met, planners are automatically provided with proof of compliance with the minimum thermal insulation requirements of Approved Document Part L1A, L2A, BS EN 6946 and BS 5250. Because the simulation program developed in


collaboration with Syscon Informatik and Sommer Informatik is internet-based, there is no need for software updates and downloads. Users always work with the latest version. The program runs on any end appliance, irrespective of the operating system.


thermal bridge calculator computes two- dimensional heat flows, isothermals, temperature factors, surface temperatures and psi values (ψ values). The calculation results provide all the information needed to produce a detailed thermal bridge analysis and the results log contains all relevant properties and notes relating to the building structure. For example, it reveals whether the building structure is at risk and whether mould and condensation prevention has been adequately


The psi value in five easy steps


1. Enter the as-is situation of the balcony connection (e.g.; freely projecting, supported, with height offset)


2. Determine the planned wall structure (monolithic wall structure or classic thermal insulation composite system)


3. Specify the structure of the individual components for the wall, floor and balcony slab


Solution to quicker, greener and easier construction launched  


The product, SureCav25 is a revolutionary building product that provides the solution to several building design issues. SureCav25 is a 100 per cent recycled, polypropylene panel that forms the cavity and is a new addition to the SureCav50 panel, which has been a trusted building product since 2004. SureCav25 is ideally suited for brick, stone and all other masonry finishes and can be installed with either traditional build or timber frame construction. One of the benefits of SureCav25 is to increase the space for extra insulation, satisfying the demand for lower U-Values. SureCav25 provides the best solution for designers to improve the thermal integrity of the building, as well as ensuring a consistent 25mm clear cavity. With Surecav25 in a 100mm cavity you can achieve a 25mm clear air gap, 75mm of insulation to help drive down U-Values to 0.18 W/m2


K plus a moisture and mortar barrier to combat water ingress from wind driven rain. In stone built


properties, SureCav25 removes the need for backing blocks, reducing the wall width by as much as 150mm which translates up to 6 per cent in floor space gain in a typical dwelling. For more information about SureCav and its products, please visit the company’s website.


01963 34660 www.surecav.co.uk Disruption avoided thanks to Sika Sarnafil church roof refurb  


Severe rainwater leaks in the auditorium at Bracknell’s Kerith Community Church were causing big problems for those using the building, forcing events and activities to be cancelled. Having already completely re-slated the roof once before, the Kerith Centre management team knew it was time for a change, with the help of Sika Sarnafil and Owlsworth Roofing. Local architects Allen Associates decided that a seamless, durable single ply solution would suit the project and offer the church protection for years to come. Allen Associates, alongside successful tenderer, Owlsworth Roofing, chose a Sarnafil Plus roofing system thanks to the wide-ranging support services it offered and Sika Sarnafil’s high performance products. Working alongside Owlsworth, who had an exceptional knowledge of the roof from photos, drawings and inspections, the Sarnafil Plus technical team created a bespoke specification for the pitched roof – a fully adhered system including Kingspan Insulation, Sarnavap 5000E SA (a self-adhered vapour control layer), and Sika Sarnafil G410-18ELF Lead Grey membrane. The project presented a number of trials for Owlsworth, but the roofing contractor rose to the challenge. The scope of works involved the complete removal of all slates, battens, counter battens and insulation, all secured to the slope with wide range of fixings.


01707 394444 www.sarnafil.co.uk www.architectsdatafile.co.uk enq.164 enq.163


4. Select the matching type of Schöck Isokorb and load-bearing capacity, together with the required insulation material thickness


5. Based on the input, the result is calculated and a log produced. A three-minute tutorial ex-plains the use and functions of the program and information ‘help’ boxes simplify individual steps


For your free copy of the new Thermal Bridging Guide and / or the Schöck Specifiers Guide – contact the company.


01865 290 890 www.schoeck.co.uk enq.162


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