#1  
Old 10-21-2008, 05:20 AM
Peasant
 
Join Date: Sep 2008
Location: Melbourne, Australia
Posts: 45
Default How long before weatherproof layer?

I completed my vermicrete layer last Saturday and was just wondering when would be a safe time to apply the acrylic stucco weatherproof layer?
I was hoping to do it this Saturday. Would this be too soon (7 days)?
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  #2  
Old 10-21-2008, 06:03 AM
Dutchoven's Avatar
Master Builder
 
Join Date: Apr 2007
Location: Mississippi
Posts: 931
Default Re: How long before weatherproof layer?

Balthazar
I wouldn't think that is too soon...I say go for it...that vermicrete stays moist for some time which should only help the layers to bond together better!
All the best!
Dutch
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  #3  
Old 10-22-2008, 03:10 AM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
Posts: 4,881
Default Re: How long before weatherproof layer?

I don't entirely agree. When you do the vermiculite layer it takes A LOT of water.Given that 1 litre of water= 1000 litres of steam, that can contribute to an enormous amount of pressure on your outer stucco layer. Why not wait at least a week to let the vermiculite layer lose some of its water (you don't need strength here, the cement is only needed to hold the mixture in place) then do your curing fires to eliminate more water, then apply the final stucco. Am I being too cautious ? I don't like cracks on the outershell.
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Old 10-22-2008, 03:23 PM
Journeyman
 
Join Date: Jun 2008
Location: Melbourne Australia
Posts: 399
Default Re: How long before weatherproof layer?

My call would be dry it out first then the render.
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  #5  
Old 10-23-2008, 01:15 AM
Peasant
 
Join Date: Sep 2008
Location: Melbourne, Australia
Posts: 45
Default Re: How long before weatherproof layer?

Thanks guys. Well by this Saturday, it will be a week since I did the vermicrete layers, and yes, I did use a lot of water, so perhaps I should leave it another week? That will make it two weeks drying in fair to warm conditions.
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  #6  
Old 10-23-2008, 04:27 AM
david s's Avatar
Il Pizzaiolo
 
Join Date: Mar 2007
Location: Townsville, Nth Queensland,Australia
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Default Re: How long before weatherproof layer?

Have you started lighting some fires in it yet ?
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  #7  
Old 10-23-2008, 04:37 AM
Peasant
 
Join Date: Sep 2008
Location: Melbourne, Australia
Posts: 45
Default Re: How long before weatherproof layer?

Nope...not yet. I thought I would let it dry out, then do the stucco layer, let that dry and then start firing it.
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