When I insulate well the technology is not important

Kay Künzel is expert for green architecture. He counts on passive houses and energy-efficient construction and is an approved expert for acoustic and thermal protection. And: Kay Künzel cannot understand the culture of questioning “When does it pay off?“ with regard to house construction. “I don’t ask this question when I buy a pair of pants, either.“

"Why is Kay Künzel, founder of 'raum für architektur' in Wachtberg, Germany, south of Bonn and qualified planner for passive houses to be found in this section of all places? Because he is a genuine (and good) customer of ISOCELL. Our new office building is the best example of sustainable renovation by Kay Künzel in 2009. ‟Windows from the 1980’s, wallpaper from the 70’s, night-storage heaters – there was no reason to keep anything. We gutted the building and re-constructed it. For insulation we used 30cm ISOCELL blown cellulose and 40cm for the roof. We did not use a conventional heating system. Pellets or gas were too expensive to even consider. Our funds all flowed into the building’s shell.”The costs prove it was the right decision. The building is heated with a small system with 450 watt maximum energy input, the fixed costs at the end of the month are 36 Euro. Kay Künzel has insulated with cellulose from the beginning of his career in 2000 – and there are many reasons why. One of these is the quality. Cellulose does not only insulate in winter, it can also handle heat and moisture remarkably well. ‟At the beginning of my time there was a lot of scepticism towards the material. I experienced this too, when I planned the first house at the age of 25. The house owner was a steelworker I had to convince to use wood for the construction. He argued that cellulose burns. So he tested it and had three large cubes built –  made of rock wool, mineral wood and cellulose. He lit the burner and we saw the positive properties of cellulose. A small carbon film of 10 to 20 cm could be seen – nothing more. Both other materials had long since burned. The house owner also wanted to investigate another prejudice. It is said that blown insulation sinks. So, we removed a large panel after a few weeks. The cellulose had settled perfectly - and did not even fall out. I have been convinced ever since and always use sit. I am not paid for doing so, but stand by my decision. I do it with passion simply because it is a really good product.”

You can read the whole interview in the ISOCELLER 01