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  #11  
Old 09-19-2011, 03:24 PM
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Default Re: Render/stucco dome a little help needed

Oscar ,
Sorry I didn't answer your last Q. Re render mix. I use 4:1:1 silica sand, Portland cement, lime mixed by volume.
Dave
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  #12  
Old 09-19-2011, 03:36 PM
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Default Re: Render/stucco dome a little help needed

Thanks David much appreciated.
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Old 09-19-2011, 06:33 PM
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Default Re: Render/stucco dome a little help needed

You may want to consider an acrylic stucco outer layer to improve "water resistance".

Note that you can never expect a stucco based outer shell to be 100% water proof.
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Old 09-19-2011, 07:57 PM
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Default Re: Render/stucco dome a little help needed

Hi Neil2

I am going to cover the dome with an acrylic sealer to help waterproof it as best I can. The acrylic layer will completely cover the dome and stand. Then I will lay down terracotta tiles on the stand and do a brick tile border (same tiles as the arch). When all done I will then cover the tiles, bricks and arch with a concrete sealer. So in short the dome will have an acrylic flexible sealer and the tiles, brick will have a concrete sealer.
I will never make it 100% waterproof I realise but water resistant it will be.
If down the track I find I'm having water issues then the whole thing will be inclosed but as I like the dome look I'm hoping that wont be necessary.
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  #15  
Old 09-19-2011, 10:11 PM
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Default Re: Render/stucco dome a little help needed

Dear Oscar
I believe you have it all covered......98 per cent is close enough

Regards dave
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  #16  
Old 09-20-2011, 01:11 AM
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Default Re: Render/stucco dome a little help needed

Because the refractory is extremely porous, in wet weather it will suck up water from the atmosphere even though the oven is completely sealed. Water can often get in around the door and also around where the flue enters the outer shell. Also you tend not to use the oven in really rainy periods so its not getting dried out. I've found it does not seem to need to go right back to the original tiny curing fires, but if you haven't used the oven for ages after rain it is a good idea to give it at least one or two slow fires before really revving it up.
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  #17  
Old 10-12-2011, 06:09 AM
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Default Re: Render/stucco dome a little help needed

Sorry to thread hijack!

I'm looking to render my dome this weekend. I'm going for a
Limestone look. Would it be possible to use brickies lite cement plus normal yellow sand?

Is there something I can add to the mix to limit cracking? Like the above fibers? Or something else.

What would I seal with once completed?
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  #18  
Old 10-13-2011, 12:32 AM
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Default Re: Render/stucco dome a little help needed

You can use chicken wire. I find the smaller holed stuff better and get it on a roll (160 mm wide) you can then cut it into workable lengths and overlap it.
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  #19  
Old 10-13-2011, 12:49 AM
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Default Re: Render/stucco dome a little help needed

Quote:
Originally Posted by david s View Post
You can use chicken wire. I find the smaller holed stuff better and get it on a roll (160 mm wide) you can then cut it into workable lengths and overlap it.
Yea ive got normal chicken wire but cut into strips!! just thought fibers would add extra strength..

Anything one can add for elasticity?
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  #20  
Old 10-13-2011, 01:31 AM
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Default Re: Render/stucco dome a little help needed

Quote:
Originally Posted by chidding View Post
Anything one can add for elasticity?
I believe lime helps, my mortar mix was 1 part cement 1 part lime and 4 parts sand.
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