If this is your first visit, be sure to
check out the FAQ by clicking the
link above. You may have to register
before you can post: click the register link above to proceed. To start viewing messages,
select the forum that you want to visit from the selection below.
Since the first ring, I have also been experiencing some shrinkage cracks using a pre-mixed air-set mortar, but it's very inconsistent. I'm almost certain that some cracking has occurred where I've over-wet the bricks, so perhaps the mortar is too sloppy and hence shrinks more? I had my brickie help out on part of one course (to show me how I should be doing it), and he advised against wetting the bricks at all, or perhaps just a light spray with a spray bottle. His technique was different from mine, and started out with a normally buttered brick of about ½" thick, then he pounded hell out of it with a rubber mallet to get it down to the required height. But there was still the odd hairline crack!
I'm currently dipping each brick into a pail of water briefly, and lightly spraying the brick bed, thinly buttering the brick and laying it. This seems to produce the best results in terms of plasticity of mortar to bed it in easily, and minimal cracking.
Despite all the cracks though, it feels as solid as a rock!
I think the issue of wetting bricks is heavily dependent upon the type of mortar being used. I hope to find the best way (for my mortar) before I reach the top course! P.
6th course. Its astounding that they stay up there, looks like they shouldn't, but somehow they do. Now I'm singing "every brick I take, every move I make, I am watching you..." As long as I don't get to "London bridge is falling down" I'll be ok.
Thank you Dave, its always nice to have your feedback. Hooray for non-perfect ovens! Actually I think its really cool how every builder's oven is different, makes it very personal somehow (show me your oven and I'll tell you who you are...).
I would have liked an arched entry on mine, but decided it would be too difficult - there'll be a non-supporting one on the outside instead.
Hahaaaa, and the dome finish... Igloo. With mosaics, that's my thing. This whole oven thing is really just a base for a mosaic (rather an elaborate base, I'll admit). Think twirly bits, colours, a twisty witchy chimney, dragons, gargoyles - there was a link to a page with dragon chimneys in one thread. Man I'd like one of those!!
Only I'm thinking that with not being sure if my dome will last because the mortar I'm using, it might be better to build an enclosure so I can get at the dome later on. :-(
How about your oven finishing plans then?
"Building a Brick oven is the most fun anyone can have by themselves." (Terry Pratchett... slightly amended)
Igloo for me too. And some stucco. I'm gonna paint the dome and stand to match, and use red clay tiles that I will cut into triangles for borders on the stand, around the oven entry, and around the wood entry on the stand.
Then again... I'm thinking about building an enclosure out of weathered wood fencing and making it look like an old shack. Complete with a sign hanging from a chain. Where one side has fallen down.....windows... doors.. etc..All crooked and funny looking.. where the porch is my oven entry.
I just cant decide...
Just ramble thoughts... and more....decisions....
BTW- I loved the dragon too.
It was cool, I think Sarah may have posted it.
And I can't wait to see your mosaic.
And you are right about personality in the oven build.
I'm kind of lazy and laid back. If it works it works...
Know what I mean?
8th course. I thought of a new song to sing: "slipslip sliding awayaahay". But they don't, they just stick there. Fascinating.
I've been shaping every second of third brick slightly to get a better fit and will probably go to thirds on the next row. On one picture you can also see my work supervisor. He's really into protective clothing and would like to see me wearing the goggles and filter 24/7...
My newest worry is that temperatures will fall below freezing before I've been able to dry out the dome a bit. I'm thinking that my non-cement based mortar will not react kindly to low temperatures if its still this wet. Worst case scenario would be a complete rebuild in spring...
But on the plus side, it answers the cure-before-insulating-or-after question for me
Comment