I have a large linden tree in my backyard (see photos below). Going by the age of the house, it could be up to 100 years old. I estimate the height at 45-50 ft, and diameter of trunk roughly 3 ft. There aren't any large dead sections. This tree was a selling point of the house.
Previous owners had tied a couple swings in the branches, and my children would love a tree house. Rather than building a large structure around the trunk, our preference is to have some places to sit among the branches. I think the linden shape, with its large fork of upward-angled branches will lend itself well to this.
I understand that there's no way to permanently attach things without creating a wound. I'd like to know just how much harm these things will do to the tree, and how to best minimize it. If it comes down to it, I'd rather give up these plans than lead the tree to an untimely death.
Considering the size and age of the tree, how harmful would any of the following be to the tree?
- Re-attach swings with wide straps or eye screws, to avoid strangling the branches.
- Re-position straps wrapped around the branches annually.
- Install eye screws in the large branches around the fork, and use them to hold a rope net and/or suspend boards.
- Install a couple of Treehouse Attachment Bolts--in case I suddenly become wealthy :).