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Straw Bale Public Forum
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Design Issues
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Clay Render Thickness
Clay Render Thickness
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6 years 6 months ago #23
by Kane Morley
Hi all
I'm just designing a straw bale home with clay render and would like to know what the current thoughts are on the finished thickness the render? I'm thinking of applying it with a Render Sprayer
www.rendersprayer.com.au/
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6 years 6 months ago #24
by Lance Kairl
Earth render ( clay binder) is usually recommended to be not less than a total of 50mm thick.
reinforced or stabilized earth render may achieve a good result with 35 -40mm thickness.
the type of render gun you have indicated will require your render mix to be rather runny, equating to many coats in order to acheive the required thickness. I have heard of one person applying 9 coats of render using a similar device. 2 thick coats sprayed on by a Pump , and the final coat ( 3-5mm thick) by hand is our usual method.
note some texture coat pumps or rotor and stator type pumps , will not cope with even small stones in the mix.
regards Lance Kairl House of bales.
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1 month 3 weeks ago - 1 month 3 weeks ago #39
by gary Dorn
we are currently building an infill Strawbale residence with clay plaster to both interior and exterior. Client wanted the plaster quick thick ( 90mm). after applying the first slip coat - by hand, we then tried to achieve most of the thickness with the next coat -
Naa at 70mm the stuff just slumped off the wall after a couple hours. -
So we then resolved doing more thinner coats - all up about 4 coats , with the final coat quite thin, so we can float then scorch the surface nicely - our walls are now pretty flat.
what actually take most of the time and determines the speed , is the sieving and mixing of the earth to create the desired plaster. - you don't really want any rocks stone or clumps of clay in the mix.
Last edit: 1 month 3 weeks ago by
gary Dorn. Reason: added text about mix
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Clay Render Thickness
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