Plug the flue pipe to the stove

[Robinruben]

Hello!

I'm in the process of converting the old family room on the lower level into a bedroom. The fireplace has been dismantled, and now all that's left is to seal the flue. The plan is to cover it with plaster afterwards.

The fireplace will be moved to the upper level at a later stage, and then I hope to use the same chimney that runs on the gable outside the house. I also want to keep the flue in the wall in case the fireplace is moved back.

How do I properly seal the flue considering condensation and the potential fire hazard when using the fireplace on the upper level later? The flue goes straight out to the chimney, about half a meter long.


Best regards

 

[Mats-S]

I don't know how the chimney flue runs, but if the soot that loosens during sweeping can make its way down to the lower parts of the chimney that served the previous stove, you might need to create some kind of inspection hatch where you can vacuum out any leftover soot. I think the chimney sweep may have some opinions if you don't do that.

I would check with the chimney sweep before sealing the connection to avoid any unpleasant surprises the next time they visit They can surely give you advice on sealing it up based on fire safety.

 

[Robinruben]

Now, I don't know how the chimney is routed, but if the soot that comes loose during sweeping can find its way down to the lower parts of the chimney that served the previous stove, you probably need to make some kind of inspection hatch where you can suck out excess soot. I think the chimney sweep might have some opinions if you don't do that.

I would check with the chimney sweep before sealing the connection so you don't get any unpleasant surprises next time they visit They can certainly give you advice on sealing it based on fire safety.

Hi Mats! Thanks for the response.

There is a cleaning hatch on the outside of the house, about 30 cm below the chimney pipe's height. The chimney is a masonry construction with a flue that goes all the way up to the top. Is it even possible to drill into this from the side when installing a new stove on the upper floor? The hope was to route the chimney pipe in the attic.

Best regards

 

[Mats-S]

Is it even possible to drill into this from the side

I did a similar conversion at the summer house when I demolished our brick fireplace and installed a Morsø cast iron stove instead. There were no problems with it, the job wasn't done by me, I hired professionals.

In principle, I never hire craftsmen, but when it comes to fireplaces that need to be built/modified, I make sure to hire a well-renowned stove craftsman to avoid issues with the fire inspection that must be done after those jobs. I advise you to bring in professionals for this, but before you sign any contracts, check with the local chimney-sweeping company to ensure the firm you plan to hire doesn't have a lot of inspection complaints.

The last time I replaced the stove and the chimney in the villa, the first thing the chimney sweep said when he saw the papers was, "this shouldn't be any problem, this firm only does correct good jobs." When you hear that, you realize it was worth a few extra bucks to hire professionals