#11  
Old 09-30-2013, 05:01 PM
david s's Avatar
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Location: Townsville, Nth Queensland,Australia
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Default Re: Fine Treated Perlite

Phil,
That product looks as though it will be quite suitable, both waterproof and elastic. Take your time and eliminate all the water on your perlite layer before doing the outside render. Throwing some plastic over the dome will tell you if water is still present in that layer and condensing on the underside of the plastic. Failure to eliminate this water can lead to the cracking of the outer shell. After your render has been finished and cured (wrap it for a week) you need to do about 10 decent cooking fires to make sure that the render itself is also totally dry or your waterproofing layer may bubble.This procedure may sound tedious in terms of time and short cuts can be made, but it eliminates most problems that can arise.Because you have used the treated perlite then there is less water to eliminate so things should be easier for you.
Good luck,

Dave

Last edited by david s; 09-30-2013 at 05:53 PM. Reason: More to say
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