Check to see if the damper is open or functioning properly. More people overlook this than you might think
Open a window or door as close to the fireplace as possible. If the smoking lessens or stops when the door or window is open, the problem is inadequate air supply.
Extinguish the fire and look for obstructions. Birds nests are commonly found in chimneys and may often be large enough to restrict flow. Soot and creosote can plug or restrict the airflow of others. If the chimney is older, fallen brick or mortar may be obstructing the flue. Any obstructions must be removed. A blocked chimney is a fire hazard and should never be used until completely cleaned and inspected. Chimneys blocked as a result of structural failure should be condemned and rebuilt.
It is possible that a masonry chimney was poorly designed. If your fireplace consistently smokes and none of the ideas presented above work, it may be that your chimney has design flaws. Please contact our office about this.
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