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Opening up a chimney

Uncovering a Victorian Chimney Arch

March 2, 2018 - 11 Comments - 5 min read

One of the most hideous features of our living (aside from that floral carpet!) was the 70s style gas fireplace. It just kills the period features in the room. The cornicing, the panelling around the window; all those gorgeous original features, dominated by one giant ugly fireplace. Luckily, we had the gas to it disconnected back when we did some work in the kitchen a couple of years back (always thinking ahead!) and so now we’re renovating the living room, it was finally time for this old thing to get gone. Finally! Thank the lord!

how to remove a 70s gas fireplace
retro 70s gas fire
You’ll remember we removed a similar old back boiler fireplace from the dining room a couple of years back, so we now have some experience when it comes to removing these things. By experience what I really mean is forceful man power. Turns out these things aren’t often held in by much and it took a mere 30 seconds to literally wrench the whole thing off the wall. Probably the quickest transformation you ever did see! It was there and then, it was gone.
victorian house with retro fireplace in living room
how to remove a retro fire
Opening up a chimney
(Word of caution when you open up old fireplaces – always be aware of the possibility of finding any asbestos board or insulation that could be hidden behind old fireplaces. I’ve written a whole post about asbestos, which you can read right here. But when it comes to uncovering anything pre the 90s it’s something you should always be aware of potentially coming across.)
Looking better already I’d say! But of course, we weren’t stopping there. We planned on opening up the whole thing in the hope of *one day* (I’m talking years away here!) having a log burner in there. When it comes to opening up an old chimney – you never really know what to expect. There should be a supporting arch to hold the brickwork up above (fingers crossed!), but more often than not, these have usually been removed and replaced for concrete lintels. You may even find neither an arch or a lintel, which is also quite common (this is what we had in the dining room!) due to more lax building regulations in the past. You may find the chimney has been completely blocked off, or you may even find original features in there – like parts of an old fireplace. Basically – it’s super exciting because you never know what you might find. The thing I was hoping for the most – was an arch.

how to open up a victorian chimney

A week or so later, we started chopping off the plaster to inspect the brickwork beneath and start opening it all back up. I say *we*, but actually, Grant did all the work whilst I took a rest for the day and basically took all the photos 😉 He used our trusty SDS drill with a chisel attachment which makes the job a thousand times quicker and easier…

removing plaster around chimney
We wanted to preserve as much of the original plaster as possible, so we only planned to go as high as we needed to – which would be as high as we could see either an arch or a lintel. If you have an arch (in good condition) you don’t need a lintel. If there’s no arch, you’ll need a lintel, even if there’s one missing! You can check out our chimney opening in the dining room to see how we DIY fitted a concrete lintel there.
Grant chopped off the plaster fairly high and there was no arch or lintel in sight, so I convinced him to climb into the opening to have a look from the inside (after all, we didn’t want to chop off all the plaster unnecessarily if there wasn’t one). Thankfully, a couple of rows of bricks higher and there was one!

how to tell if your chimney has a hidden arch
Victorian chimney with archway
It was everything I had hoped to find in the dining room a few years back, that had been destroyed. It was high and beautifully formed, in good condition and I was hella excited about it!
We then had to go about removing the bricks beneath the arch – which needs to be done really really carefully to ensure you don’t go destroying the arch. We recommend doing it by hand rather than power tools and just take care to carefully chisel out the mortar, rather than go bashing your way in. The arch, after all, is supporting all the bricks above so it needs to be solid and free from movement. So you don’t want to be causing any movement with lots of heavy bashing. Take your time and just go about it with some care.

removing bricks below an arch
how to remove bricks beneath arch
Slowly but surely, starting right underneath the arch we could see it all open up. And it is beaaaautiful!

how to open up a chimney with an arch
opening up a victorian chimney
chimney opening to expose arch
When Grant got to the ‘mini opening’ (the bit that had the metal sheet over it) we discovered a rather unusual lintel… A metal pipe. Yep, a pipe to support those bricks above it. Well I did tell you builders were laxer back in the day, didn’t I?!
dodgy lintel made from pipe
chimney with pipe for lintel

And just like that, we now have one giant arched chimney opening in our living room. Isn’t it glorious?! It’s made the room feel so much bigger now there isn’t a giant gas fireplace sticking out from it. It adds depth to the room, has given the chimney breast a focal point rather than just being a giant box in the room and the sooted up bricks show off the age and character of this building. Needless to say, I love it!

victorian chimney with hidden arch behind plaster
opening up a victorian chimney
period house with arch chimney in living room

The plan is to keep the brickwork inside the chimney exposed although it will need to be cleaned up a little so the soot isn’t constantly staining everything or falling off. But generally speaking, I like it rustic just as it is, imperfect mortar and all. We’ll patch-plaster around the opening where we’ve chopped off too much plaster and we’ll also fit a new hearth (plans for that will be revealed soon!) so that it will be log-burner ready for the much distant future.

victorian restoration living room
So, from 1970s fireplace back to Victorian style in all in a matter of hours. I know which one I prefer! How about you?

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DIY how to expose a chimney arch
Kezzabeth

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11 Comments

  • Mark Shearman November 22, 2020 at 5:58 pm

    Really interesting as I’m hoping to do the same. And I’ve just stuck my phone up the chimney to see i to have an arch. Why did you open it up from just below the arch, instead of from the top of existing hole to arch?

    • Kezzabeth December 10, 2020 at 10:28 am

      Hey Mark!

      We opened up the chimney from just below the arch because this is the most cautious way to do it. The arch provides support to all the brickwork above (basically the rest of the chimney), but the brickwork above the hole lower down (between the hole and the arch) was essentially unsupported. If we’d started removing more bricks at the bottom, the bricks above between the hole and below the arch would have become more and more unsupported and therefore could have all fallen down in one go. It may have made the job quicker if that happened, but more likely to damage floor/hearth below and make a lot more mess! Providing the arch is in good condition and working properly, we feel it’s always best to start at the top and work your way down.

      Hope that answer makes sense!

  • Sharon Asquith December 26, 2020 at 10:10 am

    I have this exact same fire and surround and am getting a more modern one but save for having the gas fire taken out I’m hoping to remove the surround myself. Was it easy to take off? If you email me I’ll send a photo

    • Kezzabeth February 7, 2021 at 8:41 pm

      Yes – fairly easy! We had the gas disconnected and then the front just pulls out – I think it was only hold against the wall by a couple of screws!

    • Matt May 3, 2022 at 6:16 pm

      Hi, I have a very similar situation to yourself where we had a gas heater removed from chimney breast-today I have taken the plaster off and there is an arch. No metal lintel underneath just bricks beneath the arch. The bricks in the arch itself look the same as yours, brick on edge cut in half due to thickness of wall. I have taken most of the bricks out beneath the arch but am a little concerned as the arch doesn’t reach over the column either side if you know what I mean. Looking at your picture this looks the same as yours to be honest. Would you have any concerns about this?

  • Olivia May 5, 2021 at 8:26 am

    I’m so glad I found this, my fireplace is exactly the same, it has a brick arch lintel, and a metal lintel bellow it. I’m worried that the metal lintel bellow was supporting the brick one above it!

    • Kezzabeth June 21, 2021 at 10:31 am

      Glad it was helpful! I’d probably get a builder to check the condition of your brick arch – it could have been installed to add support if the arch was failing or if there’s any other issues with the chimney! Good luck with your project!

  • David February 14, 2022 at 7:48 pm

    Hi Can you tell me how to clean the burnt bricks to stop the smell of ash,

    • Kezzabeth February 16, 2022 at 1:33 pm

      Hi! I’ve seen others use brick acid for this so that might be worth looking at? Never used myself though I’m afraid!

    • Nigel Parker February 17, 2022 at 10:51 am

      Simply buy and apply SBR+ and coat liberally as per instructions on container! This will seal permanently, wether for plastering or left to be aesthetically pleasing! I find that washing/brushing with a stiff bristle brush first, whilst spraying down with a mixture of liquid detergent and brick/patio cleaner fluid will pre-prep perfectly! This will also stop soot bleed-thru into any painting done subsequently if required!? Hope this helps,cheers!

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    Hi - I'm Kezzabeth! Self-taught DIYer, Renovator and Blogger on a mission to turn our house into a home. Seven years ago I was clueless and skill-less, but since then I've learnt how to build, tile, plumb and more. This is my little place on the web where I share everything I've learnt so you can learn too. Read More

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    DIY Content: We’re not builders or experts in the trade industry, so please take any information on this blog as a rough guide and just our own experiences. This blog relates to our home only and you should always consult a professional in you’re in any doubt of work. Please also be aware Building Regulations change often, so always do your own research as well.
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