Lists-leans an inch? You better get pro estimates and be sure you are
fully covered even liability on her house for you work on this one.
Actualy I dought you may want to do it. The mortar may be so bad it is
just sand compressing. You need to remove all loose mortar, if it is
that deep loose what is going to hold it from going over. Many bad
chimneys get removed and rebuilt. Get a few pros out to get up and look
before you decide it is a simple job, some books are good to. There is
alot to correct chimney repair. It could have a bad liner so it is
deteriorated from inside and out, you need mortar mix, not to thin or it
will crack, it must be cleaned or mortar wont bond, it can mean acid
washing Before new mortar. Chimneys get the most abuse. It could be a
nightmare if you just jump into it or repairs fail in a few years done
improperly.