Excuse my ignorance but why have you got to cut the hearth bricks?.....can't you just leave them sticking out from the barrel?..they will be covered with some sort of insulation anyway.....or have I lost the plot again.
If you do try to cut them with a hammer and bolster...and they end up shattering, try deeply scoring on the face side with a scribe or tile cutter, then turn over and tap along the line with a panel pin hammer thats how I cut 25mm quarry tiles.....
I haven't got an answer for you :oops: ....I have seen standard bricks (both metric...and imperial) that have been laid flat in creating the arches for a barrel/vault oven...as a bricklayer I wouldn't do this myself, but the builds I have seen using this method have been structurally sound. I think that with the large surface area of your storage heater bricks...and the tight curve of the barrel that you are using, myself....I would look for a way to cut the bricks.
You may have to bite the bullet and invest in a diamond blade or some sort of wet cutter......even the slightest score mark on the face will allow you to break the bricks....with a couple of sharp taps on the other side.
I posted a link quite a while ago on the forum of a fascinating website...all about how much can be achieved using an arch.....it's a really good insight into how an arch form works......bloody typical...I can't find it, but I will.
Hey Fat Bob, The chimney is on the start of the drum, so just behind the brick arch. I just had a look at few other barrel vault ovens and that seems where the chimney starts. Hopefully it's in the right place?
Hey Tom B, I've recycled one on the Night Store Heater cases... Woke up this morning and don't like the look of it...I'll have to do something else I think.
I'm going to put the insulation on today. The Ceramic Insulation blanket out of the night store heaters + Vermiculite Concrete. YAY.. Hide my horrible brick laying!!!
Rich, looking good, awesome progress seeing as you're getting all these earthquakes, the chimney and flue look perfect, you'll just need a way to shut it off if you plan on cooking bread/roasts, I use a block of wood that sits flush in mine that i've soaked in water, does a good job. Really liking the bricks over the barrel and wish i'd thought of that now. Love the archway too You'll soon be the proud owner of a wonderful wood fired oven Cheers Marcus
Hey Rich, looking good, I think i did 3 over the course of a few days, not sure if it was enough, but seemed to do a good job. I used just a sand, cement water and a squeeze of washing up liquid mix for the render, and then painted it with masonry paint, haven't had any water ingress issues, what I would say is make sure to use chicken wire to hold it all together and make sure there is a good join between the brick arch and barrel as differing heat expansion will crack here, and extra piece of chicken wire over the joint should work a treat cheers marcus
Interesting point from Marcus....the transition from dome to entrance archway is also a weak point in a Pompeii build...if any cracks appear, they usually start at this area, when no heatstop barrier is incorperated between dome and entrance.