How to evaluate a tree cavity?

[Arkadiy]

Hi all,

Is there a formal way to determine how bad a tree cavity is?

I have a gorgeous tree on my backyard, probably a hundred year old. I needed to do some pruning, so I invited a few different people for an estimate. It turned out the tree has a cavity at the base of the trunk. One person strongly suggests to remove the tree, since it may be dangerous -- the tree is huge. The others say it's not too bad. The tree looks perfectly healthy othewise.

All of them do their evaluation by just looking at the tree. What I am wonderig -- is there any formal test that can determine how bad the problem is?

Thanks in advance,

Arkadiy

[Frank]

There are tree cutters and there are arborists. I'd trust the latter's advice.

For me, what would the tree damage if it were to fall? I don't like big trees that threaten my house if they were to fall and have removed otherwise healthy trees because of this.

[cheryblk]

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