We have a property rented out right now and, last winter, the renters had a chimney fire. They called a sweep and the sweep said the chimney should not be used...fix was supposedly $6K. They have since departed and new renters are in place. We had an independent person check on it and he said that the bricks look bad and he suggested capping it. I know NOTHING about chimneys and we are in a different state now from the property. I saw on a This Old House where they fixed a chimney problem with a sleeve insert. Would this correct the problem? If so, who would I call for this and any ideas on the price? Sorry to be so vague but I'm trying to prevent a renter problem when they hear that they are not able to use the fireplace in a Northern Midwest state. Thanks!