In January 2018, a revision of DIN EN ISO 10077-2 was published, that now provides for two different methods to calculate the thermal performance of profiles. What does that mean for the representative Psi-values stated on the BF data sheets? This question was discussed during a meeting middle of 2017, when the Warm Edge Working […]
Another inventory on warm edge
March 5th, 2018. Just in time for the trade fair “fensterbau frontale 2018” in Nuremberg, Germany, the most important event of the industry this March, you can find my latest article with an inventory on warm edge in the journal GFF-magazine in issue 3/2018 – or directly here (in German language). As before, I explain […]
Update to the Warm Edge Update
April 25th, 2017. Unfortunately, I made a mistake in my latest article for GLASWELT issue 4/2017: One BF-data sheet, W28 for TPS IGK 611 of IGK Isolierglasklebstoffe GmbH, is missing in the chart on page 96. Please find a corrected version of the article (in German language) here.
Warm edge – Update
April 15th, 2017. Not that long ago, during GLASSTEC 2016, several new spacer solutions for thermally improved glass edge bond were introduced. My latest article for the GLASWELT-magazine gives an updated overview of the systems and informs about the latest trends. You can find the article (in German language) here.
News from the “Warm Edge” Working Party
The BF data sheets – which list representative Psi-values for windows and for façade profiles – published by the Bundesverband Flachglas e.V. (“BF” = German Federal Flat Glass Association) are often used to determine UW– and UCW-values. This comparatively simple (but standard-conforming) method is well known in the market – far beyond the borders of […]
BF Bulletin 004 – typo gremlins got into the works
March 28th, 2017. Unfortunately, the typo gremlins got into the last version of the BF Bulletin 004 “Guide to ‘Warm Edge’ for windows and facades”, and that of all things in the formulas for the calculation of Uw and Ucw. Immediately upon discovery the typos were corrected. As of now, the latest version (Modification index […]
BF-Bulletin 004 ‘Guide to warm edge’ now available in English and French
September 19th, 2016. The BF-Bulletin 004 ‘Guide to warm edge for windows and facades’ is a good introduction to the topic of warm edge. It is a manual for the often used BF-data sheets with representative Psi-values for windows and for facade profiles and explains the boundary conditions for the use of the BF-data sheets […]
Thermal bridges with windows and facades
June 27th, 2016. Just want to mention my latest article, published in issue 3-2016 of the German building magazine “bauen+” of Fraunhofer IRB-Verlag/Bundesanzeiger Verlag. Article is in German language, with detailed information about warm edge. You can find it here. For details about the magazine “bauen+” please look at www.bauenplus.de (website only available in German […]
Psi values for facades
June 23rd, 2016. The new BF data sheets ‘Psi values for facade profiles’ were just released on the BF websites. You can reach the page directly here. Background: Thermal transmission coefficients Ucw of curtain wallings are determined according to EN ISO 12631. For fixed glazings installed in a facade with mullion- and transom profiles, tables […]
Extended scope for application of BF data sheets ‘Psi values for windows’
April 3rd, 2015. The data sheets ‘Psi-values for windows” of the Working Group Warm Edge of the BF Bundesverband Flachglas (German Federal Flat Glass Association), containing representative Psi-values for windows for thermally improved spacers are suitable for a simplified verification of Uw-values of windows. However, it is not allowed to use them for each and […]
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