Why you need one and how to find one. Ask it in our Repair and Maintenance Forum . Flue A flue is the clay tile or metal liner that's inside the chimney.
Condensed moisture contains highly corrosive chemicals that eat at flue walls and mortar.
If your chimney is not equipped with a flue, have one installed immediately. All flues should be inspected yearly for damage and corrosive buildup, preferably by a professional who is trained to recognize the danger signs. What to look for . So is creosote buildup from wood smoke or corrosive deposits from heating appliances, especially if the exhaust gases cool off too much as they travel up the flue. Trouble signs include a gummy residue leaching through chimney brick and crumbling mortar, especially when the brick and mortar aren't exposed to weather.