1) Use an antifungal paint (like I have used on the edges of my new roof (powerful, green, and oily) or antifreeze (glycol) which is water soluble or some borate to kill the dry rot? I wouldn't put any of this on the cambium. Any other suggestions to kill the last remaining dry rot?
2) Then fill the hole with blown in foam, smooth it off and paint to seal out pests, more dry rot spores and water. My main cut is now vertical.
3) No we don't want to remove and replace this tree.
By James D.
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