[Greenbuilding] exterior wall

[Stephen Collette]

Lynelle,

I like Durisol, it's a fun product to work with. I might suggest what  
was used on a building I worked on up near Thornbury, ON (Collingwood  
area for local Ontario people). The durisol was the exterior type with  
the roxull on the outside and this was on the lake facing north, so  
getting a fair bit of wind and abuse. We put two coats of portland  
cement on the outside of the structure with a spray gun that was heaps  
of fun. It was trowelled relatively smooth but not too much. They put  
on a rain screen all the way around it of cedar (if I remember  
correctly) so that the water would not directly hit the wall, and the  
spacing was big enough to allow any that did get through to fall out.  
I haven't been back to see the final job, but I am good friends with  
the owner, and the architect as well, so I could find out more for you.

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: Lynelle Hamilton <lynelle at ca.inter.net>
> Subject: [Greenbuilding] Exterior wall construction--Again!!
>
> I'm building on waterfront and am looking for the exterior wall
> "assembly", if you will. When John spoke of the 'wetness' of the  
> PNW.  I
> suspect I'll be similar.
>
> The wall core is as follows:  Durasol or Concrete block (if block,
> cavities filled with insulating material)  cladded with foam on outer
> wall, then...what??  A friend, who developed a type of ICF, says  
> just to
> put fiberglass mesh over the exterior foam and then stucco, that the
> foam is the vapour barrier.  I don't know about stucco at the
> waterfront, and  have toyed with the idea of cement fibre panels.   
> Stone
> (other than the "artificial" stuff) is not a possibility, except
> possibly for a partial wall.
>
> FWIW, slab is poured concrete, insulated as much as I can.
>
> With cement fibre panels come the need to somehow attach them (through
> foam).  From all the discussion on this site, I now have no idea if
> these panels are OK and if it good or not to try to attach through the
> foam.  Also, what depth of foam do I need to attain R40 or better in  
> the
> wall?
>
> Any ideas or suggestions as to where to research?  I'm building pretty
> much on my own (as is obvious from my questions)!
>
> Thanks
>
> Lynelle