The Best Tree Species for Treehouses
Some trees are better hosts than others, but it ultimately comes down to understanding the characteristics of each tree species and managing risks associated with each. You could build a three story treehouse in a cluster of white birch trees (betula papyrifera) but the total safety factor will be low due to the softness of the wood and these trees just don't usually live for generations, so it will be a short term treehouse. But those risks don't mean you can't use those trees - it just means that you would be wise to build a small treehouse and plan to use it for your kids - but not necessarily the grandkids too.
Primary factors for Treehouse Species Selection:
- Compression Strength of Wood
- Age or Maturity
- Structural Track Record
- Growth Rate
- Resistance to Pests