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Post by downunderdave on Jul 21, 2016 19:03:58 GMT
Fabulous build, you've thought through every stage with great solutions, a wonderful oven.
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jomo
New Member
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Post by jomo on Jul 22, 2016 8:08:15 GMT
Thanks Lee,
I am part way through a build using building sand and fondue, 3:1 mix, suggested by a guy that works in a place that casts fire chair backs etc. What benefit does the grog add to the mortar? I am hoping my mortar will be fit for the job. I'm building using reclaimed clay Belfast bricks.
Joe
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Post by leetheldc on Jul 22, 2016 20:09:16 GMT
Thanks Lee, I am part way through a build using building sand and fondue, 3:1 mix, suggested by a guy that works in a place that casts fire chair backs etc. What benefit does the grog add to the mortar? I am hoping my mortar will be fit for the job. I'm building using reclaimed clay Belfast bricks. Joe Hi Jomo I used grog as it is ground up firebrick, with me using firebricks for my dome I thought the obvious thing to do was to use the grog to fill the gaps, so the same material all the way through the dome. That is where I saw the benefit. mixing it with fondue and water made for a 3 part easy mix Also . But I was advised to use a week mix with the fondue of 6 to 1 it does work fantastic when used fast. Sets like shit to a stick |
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Post by leetheldc on Jul 30, 2016 13:25:31 GMT
Fabulous build, you've thought through every stage with great solutions, a wonderful oven. . Thanks for your comments dave. It's not like I haven't had the time though I've been at it forever! |
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Post by leetheldc on Jul 30, 2016 13:25:52 GMT
Today I'm going to finally have a go at the insulation. I've had it in my garage for over 2 years now unbelievable! I didn't get chance last weekend life chours got in the way. I've read and studied pics of this procces and I'm still not confidant about it. The thing is I want it to be perfect but I've got 2 inch thick blanket which will proberly make it harder to get a good shape around the dome and I'm going for 2 layers so keeping it bump free is going to be pain
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Post by leetheldc on Jul 30, 2016 13:26:52 GMT
 So that didn't go that bad at all don't know what I was worrying about I'm itching like hell but worth it only problem is I only had enough for 1 layer of blanket I remember ordering it while I was at work and the salesman did the calculations for me never trust anyone. I found a supplier online who can get me some delivered on Tuesday or Wednesday so il have to do that. I'm going to use 25 mm thick for the next layer so I will be at 75mm of blanket in total then the 2 to now 3 inch of vermicrete |
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Post by downunderdave on Jul 30, 2016 20:38:40 GMT
So that didn't go that bad at all don't know what I was worrying about I'm itching like hell but worth it only problem is I only had enough for 1 layer of blanket I remember ordering it while I was at work and the salesman did the calculations for me never trust anyone. I found a supplier online who can get me some delivered on Tuesday or Wednesday so il have to do that. I'm going to use 25 mm thick for the next layer so I will be at 75mm of blanket in total then the 2 to now 3 inch of vermicrete With all that blanket you don't need 3 inches of vermicrete.. The vermicrete just holds the blanket in position and as your oven is under a roof you don't need to make the outside of the oven waterproof, it would be better left porous. Vermicrete takes heaps of water, a third of its volume in fact, to make up the mix and if you make the layer thick then drying it becomes problematic. I usually only do one and a half inch thick layers with a week drying in between. If you seal over wet vermicrete then you lock the moisture in. |
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Post by chas on Jul 31, 2016 9:38:11 GMT
Second that re additional vermicrete. I put 50mm blanket over the bricks as an afterthought and the outer shell now barely gets hand-hot, if that's any test of heat retention - but I wouldn't discourage you from adding the extra 25mm.
I skimmed mine with K-Rend over chicken wire. You can see it in the 'retro-fit' link below.
Chas
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Post by leetheldc on Aug 4, 2016 17:55:22 GMT
Thanks for the heads up guys but I'm planning on letting the verm dry as long as it needs also I'm going to incorporate a vent through to the blanket layer as an extra precaution I need the vermicrete to act as a cushion for the weight of my brick slips I'm going to add to the dome and the render for a hard surface to drag the tile trowel over My extra blanket came yesterday I didn't bother with the 25mm and just got another 50 mm as I had the room for it so 100 mm of blanket in total leaving 30 to 50mm of vermicrete under the profile I got home today and got the lath in place the vermiculite and cement are in my garage so hopefully I can get started on that tomorrow after work  |
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Post by leetheldc on Aug 6, 2016 19:16:59 GMT
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Post by leetheldc on Aug 8, 2016 19:36:23 GMT
I got A few more courses of the vermicrete done getting there now slow but worth the effort   |
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Post by moonhead on Aug 9, 2016 20:18:39 GMT
That has to be the neatest application of vermicrete I've ever seen...
Looking very smart
Rick
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Post by leetheldc on Aug 10, 2016 9:59:53 GMT
Thanks Rick but the tools do make it easy
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bry
valid member
Posts: 56
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Post by bry on Aug 10, 2016 18:25:59 GMT
Thanks Rick but the tools do make it easy You appear to have made the tools tho.. Very neat and very precise, looks very good. You an engineer of some kind by day by any chance? |
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Post by leetheldc on Aug 10, 2016 19:11:21 GMT
Thanks Rick but the tools do make it easy You appear to have made the tools tho.. Very neat and very precise, looks very good. You an engineer of some kind by day by any chance? Ha no I'm no engineer just a dirty groundworker doing house foundations, drains, roads etc. I've done lots of paving though so I do have some form of trowel hand as u would say. it's not my design either I did make the tools but I stole- borrowed the idea from other builders not from this forum from fb |
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