Examples of our projects: IKEA, City Center Vienna / EXPO Dubai, Austrian Pavilion
We are Architects, Tree experts,
Service designers, Sustainability lovers.
our Tree(m) Team
Jakob Dunkl
Peter Sapp
Gerd Erhartt
The three architects have been running querkraft ZT GmbH since 1998. Together with Bernhard Scharf, they have completed countless green projects, including the multi-award-winning IKEA at Vienna’s Westbahnhof.
Favourite question:
How can we give
mANY trees to people?Bernhard Scharf
You’d be lucky to find anyone who knows more about trees than he does. Bernhard researches and teaches at the University of Natural Resources and Life Sciences, Vienna. He is also a co-owner of green4cities landscape planners.
Favourite question:
Who has the most
beautiful tree?Sabine Kleinhagauer
She understands customers particularly well, having most recently worked as a Customer Experience Manager at a large Swedish company. Sabine knows what people are dreaming of.
Favourite question:
Why wouldn’t you want
to plant a tree?Gina Roth
Our office manager has worked in this role for querkraft ZT GmbH for many years. She takes care of all internal matters and is also responsible for customer relations.
Favourite question:
Which tree species are
“climate fit” for the future? our commitmentInterested?is your place RETREEFIT?
Tell us your needs.
We love design and trees. We are happy to customize your space from retro to retreefit and and create a tailored concept for healthy trees on sealed surfaces.