[GSBN] Lime plaster and expansion joints

[Bohdan Dorniak]

Hi Laura
We've had some cracking in large length walls (the post and beam structure
was using steel frames.
To repair the strawbale constructor used the standard hard plaster expansion
joint over the second coat , the on the final coat
a silicon sealant. So far we can't find any other solution.
Maybe some else might shed some light??
Regards,
Bohdan Dorniak

Bohdan Dorniak & Co Pty Ltd
Architects & Town Planners
47 Prospect Road
PROSPECT SA 5082
P: (08) 8344 8170, F: (08) 8344 6480
 <http://www.bdcoarchitects.com.au/> www.bdcoarchitects.com.au

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From: GSBN-bounces at greenbuilder.com [mailto:GSBN-bounces at greenbuilder.com]
On Behalf Of Laura Bartels
Sent: Saturday, 7 February 2009 5:58 AM
To: GSBN List
Subject: [GSBN] Lime plaster and expansion joints


Dear Community, 

I've been meaning to raise this question for a bit, but now have a specific
project that has prompted me to finally get to writing (isn't it often that
way?). As straw bale projects are used for larger projects, and lime plaster
is used on these, it begs the question of whether we need to be using
expansion joints on large expanses. With lime having different
characteristics than a cement stucco, I'd be curious to know from those who
are well ahead of me in doing large straw bale projects with lime if you
have seen issues with not using expansion joints. For those who may use
them, at what square footage of unbroken wall has it seemed to begin to make
sense? Certainly there are large historic lime plastered structures to look
to, but given the fact that historically the substrate was not straw bale, I
wonder also how we can still learn from these and apply lessons to our work.


I am always grateful that we have this community and these discussions. 

Regards,
Laura 





Laura Bartels
P.O. Box 912, Carbondale, CO 81623
Ph 970-379-6779, Fax 970-963-0905
laura at greenweaverinc.com
www.greenweaverinc.com 



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