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Old 10-13-2011, 07:24 PM
Join Date: Jan 2011
Location: Perth, Wesern Australia
Posts: 178
Default Re: Render/stucco dome a little help needed

Appreciate the help guys! this forum is the only reason i could do this project!
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Old 03-25-2012, 08:38 PM
Join Date: Oct 2010
Location: USA
Posts: 40
Default Re: Render/stucco dome a little help needed

Howdy Mates : How do you make the final coating over the vermiculite to make it as waterproof as possible ? Were almost done, pictures here: DIY pizza, Pizza Making Supply, DIY Pizza oven, DIY pizza-ovens, DIY wood ovens, pizza Cutter, Pizza Stones, pizza knives, spice shakers, cheese shakers, crushed red pepper shaker, grill pizza, grill pizza, pizza Q, BBQ pizza, make pizza grill, makin Oven is built of mostly "FREE" recycled materials !
Cheers !
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Old 03-26-2012, 04:29 AM
david s's Avatar
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Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 5,160
Default Re: Render/stucco dome a little help needed

Don't be in a rush to render over the vermicrete. If you calculate the volume of vermiculite used then you have added approximately a third of that volume in water. As you have made quite a rich mixture 8:1 verm. cement, then the mixture will not dry quickly because more of the spaces between the grains are filled with cement. Suggest you fire about 10 times before considering rendering over it otherwise you risk cracking the outer shell from steam expansion. Also suggest waiting until the outside render is complete and hard and again well fired before waterproofing. The render mix I use is 4:1:1 sharp sand, cement, lime.
Good luck.

Last edited by david s; 03-26-2012 at 04:33 AM.
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