Hello,
I cut back some drywall around an unused fireplace and found a partially open cavity where there was once brick, and some wood framing and rock wool above the steel lintel. (See photos) I’d like the fireplace to be usable (safe), so do I need to cut out the wood and insulation and fill in the empty space? Or is it sufficient just to cover it with non-combustible material (porcelain tile)? If it has to be filled, what are my options? I’m not a mason, so the simpler the better. 🙂
I appreciate any suggestions. Thank you!
Replies
my quick look at your pictures "tell" me that fireplace is unsafe and un-useable as is.
the steel lintel will heat up and eventually cook that wood framing and it will eventually ignite
I forget the exact requirements for clearance from combustibles for fireplaces but it's at least 10 inches and possibly 18 inches.
additionally, if you have an unlined brick chimney, you could have missing mortar joints that allow sparks from a wood burning fire to get into the void spaces around the chimney and they too will eventually ignite and burn. Sometimes hours after the fireplace fire is extinguished
your best bet, don't use the fireplace. most fireplaces end up drawing more heat out of the occupied space than they produce to heat the space. Nice look, but not helpful to heat the space and looking quick at what's there, a hazard.
Yeah, that was my concern. Thank you. If I give up on usability, then it certainly simplifies the work!
If you do want a functional fireplace in this space, it would be a good idea to consult with a local shop or chimney sweep.
Looks to me like a previous fireplace was removed at some point.
You would need a careful examination of the chimney and other structures.
might be possible to get a wood stove, insert, gas fireplace, or other appliance. may need a chimney liner or a complete metal chimney sized to go with the new appliance.
As noted, open fireplaces are not likely to add much heat to the space, and may loose more than they provide, but they can be nice to look at.
Thanks to those who replied.
I think I’ll just proceed with the mindset that this will be a decorative fireplace. Honestly in 3 years we never used it, and my main concern now is my moral obligation to any future owner to not hide anything unsafe. So if I seal up the flu with some foam insulation that should make it clear that the fireplace is retired and should not be used.
So, in that case, I’ll probably just fill the cavity with some mineral wool and maybe even add some furring or blocking to hold drywall or stone or whatever decorative element we decide on for the surround.
Any tips to insulate and/or air seal would be welcome. Now that I’m committed to decommissioning the fireplace I might as well keep the cold air out. :)
Thanks again.
I get where you're coming from. Thanks for addressing my concern. If I decide to prioritize simplicity over usability, it would definitely streamline things!
For safety and compliance, consider covering the open cavity with non-combustible materials like porcelain tile. If there are gaps, fill them with non-combustible insulation. For simplicity, consult a professional mason to ensure your fireplace meets safety standards and local building codes.