Last year I was called to lokk at a big ash tree for pruning (over 40"dbh), when I got there and looked at the tree I was shocked. A landscaper they hired last year to install a patio had rented a stump grinder and ground off every primary root right up to the trunk /forum/images/graemlins/shocked.gif .
I was amazed the tree was even standing. Right next to the house, patio, etc. On the other side was the kids jungle gym beneath, it was down right scary.
I basically declined to bid because IMO it should nt have been climbed and bucket truck should have been used even though there was no access for it. Some cowboy climbed it.