[Greenbuilding] Under plaster alternatives

[Stephen Collette]

Hi Mike

When I used to build straw bale, we would use Tyvek underneath our  
plaster over top of wood members that would come in contact with the  
plaster. We learned that if we left the wood bare, the moisture  
absorption would be different and yield cracks everytime. So you could  
try tyvek.

The funniest was a job we did where it was a giant hemp bale barn and  
the tyvek cutouts said something like "Dupont's chemistry, making life  
better" sort of thing. (funny if you know that Dupont was the  
instigator in making hemp illegal since they invented nylon rope).

Stephen

Stephen Collette BBEC, LEED AP
Principal
Your Healthy House - Indoor Environmental Testing & Building Consulting
www.yourhealthyhouse.ca
stephen at yourhealthyhouse.ca
705.652.5159


>
> From: "Mike Forbes" <biodieselmike at gmail.com>
> Subject: [Greenbuilding] Lime Plaster Stucco
> To: greenbuilding at listserv.repp.org
> Message-ID:
> 	<3f1aa1c90805201259ibf5a01emefafbdf125d05547 at mail.gmail.com>
> Content-Type: text/plain; charset=ISO-8859-1
>
> Hi all,
>
> i'm getting ready to finish up our attached greenhouse and we  
> decided to
> cover the interior walls with lime plaster that we have left over  
> from the
> rastra.  The walls in the greenhouse are OSB (outside of the SIP).   
> The
> conventional way to apply plaster on interior walls in this  
> application is
> to use tar paper for a backing/waterproofing with a self-furring  
> lath over
> that for the scratch coat to adhere to.
>
> I'd like to avoid tar paper in this application if possible and  
> wondered if
> any of you have suggestions as to what might work well and be
> non-toxic/non-off gassing.  The plaster we are using is St Astier  
> with a
> total thickness of approx 5/8".
>
> thanks so much in advance...
>
> mike forbes
> moscow, idaho