Lay balcony slabs with freezer bags
It is annoying to you, that the freshly laid balcony plates in the next winter again freeze? No problem anymore. You need freezer bags 3L, a household vacuum sealer, concrete and plates of course. The concrete should be wet and crumbly. Then you fill the concrete in the freezer bag (about a small soup can full), weld the bag so that there is as little air left in it and move the plates so that the plate corners rest well on the bag. You should not forget the "gradient". The concrete hardens normally.
