At the height of the platform, the girder should have a trunk diameter of at least 35 cm (more information here). If no such tree is available, there are two possibilities:
- Wait: If patience is your strength and grandchildren are in sight, you can postpone the treehouse project for a few years; the trunk diameter grows +5 to 15 mm per year on average.
- Build a stilt house or a mixed form, for example with a tree screw and three uprights. Many of the most beautiful “tree houses” are supported by artificial stilts, which is also common practice in professional tree house construction. Don’t worry: The real tree-house feeling will still come about as soon as the house hovers a few meters above the ground and kisses the treetop.