Condensation Inside Chimney Liner

This is often a problem when the liner used is not the ideal size or material.

Condensation inside chimney liner.

Leaks in the chimney structure a condensation effect also can happen within the chimney itself. Condensation can occur when ascending combustion gases meet cooler temperatures in higher parts of the flue finally dropping below the dew point. Usually a new liner will resolve this problem. You insert one end of the run of the tee into the liner where the liner emerges from the chimney.

You will need to protect the insert from moisture problems. The wetness on the outside faces of the chimney occurs when the condensate migrates through the mortar. A chimney cap had been added to the chimney above the furnace flue when the roofing had been done to complement the existing cap above the fireplace flue. As you know if you plug the top of the chimney above the fireplace the flue liner condensation will trickle down to the fireplace.

Then reconnect the flue to the other end of the run. On occasion we have identified the wetness around a chimney to be due to the condensation of the airborne moisture in the exhaust gases discharged by the furnace on the cold chimney walls. Instead of allowing moisture to evaporate the condensation may just soak the brick interior and then drip down. Condensation inside the chimney can cause a leaking chimney.