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Post by mart1899 on Jun 30, 2012 20:05:28 GMT
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Post by turkey on Jul 1, 2012 9:11:03 GMT
looks very good and mighty well planned. If you can get some dpc between the next course of blocks I would but otherwise just having your base protected us good.
I would imagine it will shoot up now, so I would make a mock up to decide on hearth height as you go as that will be determined by the clockwork and thickness of the hearth slab.
good luck with the weather :-)
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Post by mart1899 on Jul 2, 2012 5:37:12 GMT
Thanks, I wasn't going to bother with the dpc but I think I will change my mind.
I have worked out the hearth height, I'm a short arse so I don't have to go up too tall.
I'm doing 3 courses of blocks, paving slabs, a course of insulating thermalite (celcon solar) laid on their edge, then a 50mm hearth slab.
Once I get to that point I hope I can visualise what im going to do next...
I didn't get anything done Sunday, except for cutting the blocks. Just a waiting game for the next gap in the weather now.
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Post by mart1899 on Jul 7, 2012 21:41:33 GMT
This weather is rubbish and have not managed to move any further forward at all.
Looking at the suggestions from everyone else, I went and bought an Argos £18 gazzebo on friday, which I put up today in the rain, so going to have a go again sunday.
Will be glad when i have the block work and paving slabs down, I hope I can then do bits and pieces, rather than waiting for the time to do a load of work, not sure if it works like that.
Not sure I my last post was what I originally planned, I was thinking about..
Laying thermite blocks flat on the paving slabs, so the height of the course is 100mm. Then putting down a 50mm vermiculite & cement slab, followed by firebricks layed on their edge.
Few questions really, is this overkill?, should I put the thermite blocks on their edge so that they give more insulation?
The should I leave the vermiculite slab out and lay the firebricks on top of the thermite blocks?
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Post by cannyfradock on Jul 8, 2012 10:17:29 GMT
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Post by mart1899 on Jul 25, 2012 21:53:33 GMT
Well I'm glad I got the gazebo, its been far too hot in the sun for working.
Somehow I managed to get the 50mm pavers on 2x 600x600 and 2x 900x600mm...
Even moving them from the front of the house to the back was bad enough, the 900x600mm ones are 70-75kg, a little bit lighter than me. My other half gave me a hand with one, the other I just moved :-(
The last paver to go on was the larger 900mm one, big mistake!! I had 2 pieces of paracord around it to lift whilst standing on the base and Jo had the edge that was accessible from the side.
I even managed to trap my flies between the block work and one of the pavers, that made me laugh luckily.
I decided to lay the blocks on their side and stick a vermiculite slab down (did that tonight) mainly to isolate the thermite blocks from the heat of the fire bricks really.
I have used celcon solar blocks not thermite, as these have slightly better thermal properties for the same price and will be using them from now on as a bit more insulation.
Photos will follow, just need to work out my vault design and what I need to order next.
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Post by cannyfradock on Jul 25, 2012 23:27:45 GMT
Mart
I can't see any difference in the blocks being laid flat....or on end. They have brilliant thermol qualities and don't transfer heat. I....and a few other go with slab.....thermolite on flat, then fire-brick hearth. Or even ceramic fibre board between slab and block.
You have laid vermecrete ...on top of the blocks. Normally we hear of thermolite...or vermecrete...seldom both. In reality your oven hearth should perform better than my system.......it would be interesting to get temp readings off both ovens after fully firing.
All the best with your build.
Terry
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Post by mart1899 on Jul 26, 2012 20:53:12 GMT
As turkey suggested I put a dpc between the 1st and 2nd courses, glad I did looking at how the rain water over the last few weeks has crept up the blocks, it also made laying the 2nd course very easy, as the thermite blocks suck all the water out of the mortar even after wetting them down. You can see the 2 internal lintels that were fitted to the front of the oven to hold the pavers up, I put one on top of the other as there was a bit of bend with a signal one holding my weight. Two heavy pavers and two not quite as heavy ones lifted on. I made block spacers up to get the levels right before I placed the pavers, there was no way on earth I would have been able to level them up after. You will see a patch of mortar on the last paver, I thought I had messed up big time after putting the level over it, it was way off and couldn't understand what I had done wrong, then I realised that the paver had a bow in the top surface, so I levelled that up with the mortar. I had some spare mortar over from one of the paver mixes, so put the arch in for the wood storage area. You can see the top layer of celcon solar insulation blocks at the back, that I had started cutting.
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Post by faz on Jul 27, 2012 5:53:42 GMT
Looking good!
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Post by cannyfradock on Jul 27, 2012 16:40:01 GMT
Great progress Mart.......way to go!!!
Fingers crossed that this weather hold out a bit longer for you.
Terry
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Post by turkey on Jul 27, 2012 17:33:11 GMT
it might be even better than holding out.... Cooling off.
too hot for me atm, but hope that's might be able to have a crack at rendering tomorrow.
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Post by mart1899 on Jul 27, 2012 20:36:52 GMT
Good luck, I can't wait to try my hand at rendering.
Just a quick question spent the last few hours working out my fire bricks with a glass of wine and want to make sure I understand about the ratios of vault and door height.
The door height is the entrance to the vault before it opens up to the internal vault height.
So you have the vault roof, dropping down to the door height, then the chimney area, then the external arch.
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Post by faz on Jul 28, 2012 13:21:06 GMT
Definitely don't attempt rendering on a hot sunny day - you will find the render far less forgiving as you apply it and you're much more likely to end up hot, sweaty and annoyed, especially if it is your first go at rendering. I speak from previous experience
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Post by mart1899 on Aug 26, 2012 20:50:58 GMT
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Post by cannyfradock on Aug 27, 2012 7:51:31 GMT
Mart
It's starting to take shape now.....good work. Any small gaps between the fire-bricks on the hearth will eventually fill up with ash. Any corners of fire-brick that stick up and may catch the peel can easily be ground down with a 4" grinder.
If you are using the ready-mix fire-clay, make sure that the gap between the bricks at the rear of each arch isn't too big. If the fire-clay is still soft in this area after a few days, you may want to use the homebrew mix as well......but don't panic......I just want your build to go as smooth as poss.
Terry
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