Welcome to the english translation of ubakus.de (formerly www.u-wert.net) which is a quite successful website in Germany. This website aims to support you on the planning of your insulation: After entering all layers of a building component into the U-value calculator you will receive information about the expected heat loss, eventual moisture problems and many other things.

How it all started…

In 2004, my wife and me bought an old house – some parts being dated significantly before 1880 – and being a physicist with a doctoral degree, I couldn’t help but diving deep into building physics. In addition, I am a passionate programmer. The development of this U-value calculator was therefore inevitable and at the same time such a big success, that I created the German website in September 2009 and the English version in August 2011.

About me

R. Plag, Macher von u-wert.netName: Ralf Plag
Born: 1974
Study: Physics at University of Karlsruhe
PhD: at Karlsruhe Institut für Technologie (KIT, at that time still „Forschungszentrum Karlsruhe“).

After my PhD, I worked at Forschungszentrum Karlsruhe and University of Frankfurt on Astrophysics and until 2017 at GSI Helmholtzzentrum für Schwerionenforschung GmbH.

If you want to contact me, please use the contact form.