[GSBN] Plaster detail at Bale/Plywood Interface

[Rene Dalmeijer]

We use a low density wood fibre board 'soft board' 10-20mm cover board here to hide this type of transitions and some form of mesh. We do this quite often to hide transitions from a soft substrate ie bales to hard wood etc. Recently even from a concrete block retainer wall to a wood frame above grade wall, most times no cracking. 

We have no experience with cement plasters only lime and earth plaster using this technique.


Rene Dalmeijer Proces Advies
Thomas Hoodstraat 2
1086 WE Amsterdam

06 48955419

KvK 34243755
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ING 4388720

IBAN NL09INGB0004388720
BIC INGBNL2A

On Nov 17, 2014, at 23:38, Bruce EBNet wrote:

> 
> There WILL be a crack at that joint.  Flash & detail for it, don’t be in denial.  Articulate when you cannot hide.
> 
> Thanks,
> 
> Bruce “Been hiding out too long” King
> 
> 
> 
> 
> 
>> On Nov 17, 2014, at 2:26 PM, Ian Smith <ian at lopezsmolensengineers.com> wrote:
>> 
>> Hi everyone,
>> 
>> I'm currently helping with the design of a one-story SB house with a rectangular footprint and a simple shed roof.  The SB walls will be constructed with a wood bond beam that's in the horizontal plane around the whole perimeter of the house, supported on wood posts.  Prefabricated wood trusses will then bear on top of these beams.  The trusses will have a "right triangle" shape to create the shed roof and a flat ceiling on the interior.
>> 
>> On the higher side walls of the trusses, the owner would like to have plaster continue all the way up to the underside of the roof (actually, to the underside of the roof sheathing), with minimal trim/flashing, etc. at the interface/transition between the straw bales and the plywood.
>> 
>> I've already mentioned to him that there's the possibility that that plaster will crack at this interface (due to the differences in substrate material, plaster thickness, etc), and I've suggested that there be a control joint in the plaster, or a piece of trim with flashing or something.
>> 
>> I'm just wondering how the rest of you prefer to deal with this detail...
>> 
>> Thanks very much,
>> 
>> Ian Smith, P.E.
>> Boulder, CO, USA
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