160 new apartments are being built in Würzburg. The 25,000 cubic meter excavation pit for the housing development has to be absolutely watertight. This is a real challenge so close to the River Main. In the Riem district of Munich, the "construction site heroes" are welding stainless steel sheets for two competition swimming pools on the campus of a high school. And ship designer Michael Oehmcke has designed a houseboat for a family of three in Hamburg-Harburg. However, when it comes to carpentry of the larch wood facade, not everything goes as planned. The boards are warped.