How do I unblock my chimney?

Author: Jadyn Nikolaus  |  Last update: Thursday, July 2, 2026

Use a wire brush from the bottom half of the chimney to get the rest of it. You may also be able to remove nesting materials without scaling the roof at all, simply using a special corkscrew attachment to a cleaning rod, which hooks onto the nest and drags it out of your chimney.

Can a blocked chimney be unblocked?

Professional chimney companies use tools specifically designed to unblock chimneys and flue liners, so if your wire brush did not adequately unblock the chimney, chances are the professionals will have a more effective tool.

How do you clear a blocked chimney?

Empty the debris out of your stove or fireplace. Light a fast, hot fire. Lots of kindling and paper to get hot fast. Cardboard helps, as does well dried, light wood. Let it burn for about half an hour. Look up at the smoke coming out of your chimney, it should now be white.

How to open a blocked chimney?

Always, always, always unblock from the bottom. Never unblock a chimney from the top. In cases of nesting material there are corkscrew attachments that can be put onto cleaning rods. They actually hook into the nesting material and lift it out.

What to do if your chimney is blocked?

In reply to SI A: bit of brute force. poke it with sticks etc. if it's totally jammed use poles on top of a hydraulic car jack to forcefully break up the bottom layer af blockage. be prepared for it to 'go' very suddenly and violently. wear masks and goggles and probably hard hats would be wise.

3 Signs You May Have a Blocked Chimney

How much does it cost to unblock a chimney?

The cost of chimney sweeping varies based on the specific type of fireplace or stove. Gas fireplaces, which generally accumulate less residue than wood-burning variants, cost on average between £60 to £90 for a sweep. Wood-burning fireplaces, with their traditional design, usually range between £80 to £100.

Can you reopen a blocked chimney?

If the chimney has been capped or blocked off, this will also need opening up before you can use it again. The chimney will need to be swept, too, as there could be some debris up there. A professional chimney sweep should also be able to let you know what state the flue is in, and if any repairs need to be done.

What causes a chimney to block?

Soot often builds up and clogs the chimney, causing the smoke to seep back down into your home, rather than escaping through the chimney. Chunks of debris like slate, bricks or bits of bird's nest also make their way into chimneys that aren't cleaned regularly causing blockage chimney issues.

How much does it cost to open a chimney?

Fireplace Opening Up Charges: The cost for opening up a fireplace typically ranges from £200 to £600, depending on the complexity of the project. More intricate designs or structural adjustments may increase the overall price.

How do you unlock a chimney?

How to open up a fireplace: the process
  1. Remove the existing fire. Safely remove your old gas or electric fire. ...
  2. Pull away the plaster. Tap the wall for signs of hollowness, then break the plaster away with a hammer and chisel. ...
  3. Open up the recess. ...
  4. Examine the cavity. ...
  5. Sweep the chimney. ...
  6. Check the chimney's performance.

How do I tell if my chimney is blocked?

Warning Signs Your Chimney May Be Blocked

The fireplace fills with smoke. Difficulty lighting a fire. Fire burns out quickly. Black, tarry flakes inside the flue.

How do you Unbrick a chimney?

If bricks were used you will need to carefully remove these with a hammer and chisel, without damaging the surroundings. Remember to use lime mortar to make good any old joints in the chimney's bricks as you go.

Can I clean my chimney from the bottom?

If you're uncomfortable with heights and have a fireplace big enough to accommodate your upper body, then brush the chimney from the bottom up. Reach into the fireplace with the wire brush and up into the flue. Scrub the flue walls with an up-and-down brushing motion. Extend the brush as needed until you reach the top.

Do you need to vent a blocked up chimney?

It is vital to allow for continued airflow, and that's not the only issue. Safety experts recommend annual inspections for retired, blocked off, and unused chimneys. Chimney exteriors are prone to damage, though problems are rarely obvious.

Are chimney balloons a good idea?

Chimney Balloons can deflate over time and can be prone to puncturing. Re-inflating them every three months can become tiresome and even messy. Unless you don't mind getting in your hands and knees to re-inflate or re-install your balloon every 12 weeks, we recommend that you get a Chimney Draught Stopper.

Can I open up my chimney breast?

If you have a blocked-up fireplace in your home, you may wish to open it up and install a gorgeous wood burning stove to really make the most of this lovely feature. This should be a fairly straightforward - if messy - procedure; however, if in doubt, always seek advice from an expert.

Is it cheaper to remove or repair a chimney?

In the short term, repairing a chimney is typically cheaper than removing it. However, for unused or severely damaged chimneys, removal might be more cost-effective in the long run, eliminating future expenses.

How do I make sure my chimney is open?

Feeling the breeze is another method you can use to know whether you have an open or closed flue. Locate your hand inside the fireplace and wait to notice if you can feel the air flowing. When the flue is open, air will flow down the chimney. Damper controls vary depending on functionality and structure.

Can I sweep my own chimney for insurance?

Most policies will require a professional chimney sweeping once a year. If you ever need to make a claim, having an in-date chimney sweeping certificate shows that you actively maintain your home.

Will a hot fire remove creosote?

These flakes are more difficult to remove than soot and will require more complicated equipment to take care of. Third degree creosote buildup in a chimney. Hot fires kill creosote.

How can I improve my chimney suction?

Installation and Maintenance Tips
  1. Professional: Ensure your chimney is installed by a qualified technician.
  2. Ventilate: For Proper ventilation mount the chimney at the correct height.
  3. Clean: Clean or replace filters as recommended.
  4. Duct: Check the duct periodically for any clogs or damage.

What can you do for a clogged chimney?

It's recommended to remove blockages from the bottom up. This method is good if you are uncomfortable with heights. You simply start cleaning from the bottom and work your way up to the top. You can also hire a professional chimney sweep for a chimney cleaning!

How to clean out a clogged chimney?

Use a wire brush from the bottom half of the chimney to get the rest of it. You may also be able to remove nesting materials without scaling the roof at all, simply using a special corkscrew attachment to a cleaning rod, which hooks onto the nest and drags it out of your chimney.

Can you unblock a chimney?

Once the chimney cap is removed, you will have better access to the interior of the chimney. You will want to take your brush and scrub along the sides to remove debris. With your flashlight or headlight, you will be able to check for any missed areas and ensure the clog is completely removed.

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