When smoke comes into your living room instead of going up the chimney, your fireplace has a draft problem. Several things can cause it — and most are fixable.
A closed or partly closed damper
The simplest cause: the damper is not fully open. Always open it completely before lighting a fire, and check that it is not warped or stuck.
A cold flue
A cold chimney holds a plug of dense, cold air that blocks the draft. Warming the flue first — by holding a lit, rolled newspaper up near the damper for a minute — gets the air moving upward before you light the fire.
Creosote or a blockage
Heavy creosote, a bird nest, or debris narrows the flue and chokes the draft. A sweep and inspection clears the blockage and restores airflow.
The wrong flue size or a home too airtight
A flue that is too large or too small for the fireplace drafts poorly, and a tightly sealed modern home can starve the fire of air. Cracking a nearby window often helps, and a technician can advise on liner sizing or a make-up air solution.
Fireplace smoking you out?
Careful work, up-front pricing, seven days a week in La Grange and the western suburbs.
Call (708) 432-5330Frequently asked questions
Why does my fireplace smoke only sometimes?
Weather and air pressure matter. Cold, windy days and negative pressure in the home make back-drafting worse, while a clean, warm flue drafts better.
Does opening a window really help?
Often yes. Modern homes can be too airtight for a fireplace to draw properly. Cracking a nearby window gives the fire the air it needs.
Could it be a dirty chimney?
Absolutely. Creosote buildup and blockages are common causes of poor draft, which is why an annual sweep and inspection matters.
When should I call a pro?
If the damper is open, the flue is warm, and it still smokes, book an inspection — you likely have a blockage, liner, or sizing issue.
Written by Adam Evans, owner of Chimney Sweep Brothers and a chimney technician with 12 years of experience serving La Grange, IL and the western suburbs.