How Do I Fix My Fireplace That Lets Smoke In?

Heat the chimney flue. If the only time you have to deal with back puffing is when you first light your fire, the cause is most likely that your chimney flue is cold. Roll a newspaper into a torch shape, set it on fire and raise it as high into your chimney as possible for a minute and then immediately start your fire.

Determine that your fireplace has a large enough air supply. Turn off all exhaust fans in your home, even those on other floors. If back puffing is still taking place, open a door or window near the fireplace. If that stops the smoking issue, then the solution to the problem is to install an air supply ventilator.

Install a chimney cap. If the only time that you have back puffing is on windy days, installing a chimney cap will solve this issue. The harder the wind blows, the harder the cap will work to pull the air out of the chimney instead of allowing it to enter your room.

Install a weatherproof exhaust fan. A weatherproof exhaust fan will create a forced air draft or pull to eliminate any back puffing issue.