Are you sure you are describing the repairs accurately.
Do you have a masonry crown applied to the chimney material or do you have a cast concrete unit that is placed on top of the chimney?
There would be a difference whether ot not you removed the crown or not, but that should not be big $s (a lot of money) in comparison to the cost of getting someone out to do it. - What are the costs?
If it was cracked. I would replace the crown. Either way you have to seal the joint between the crown and the flues.
Last edited by concretemasonry; 06-14-2007 at 09:46 PM.