When we look at the interior of the same chimney we can find a number of imperfect conditions. Pieces are missing from the original clay liner and there are cracks in the clay liner. (Old chimneys might not even have a liner.) Mortar and bricks are loose and falling. And there is excessive buildup of combustable creosote on the flue walls.

These conditions are the result of a number of possible causes, including: flue fires, an improperly vented or misused stove, poor construction, excessive moisture, and more.

With continued use of this chimney, any of these conditions could lead to loss of property or life.