Hmm, fiber cement on EPS core?

[robsarve]

Isn't it precisely this kind of thing that has created such severe mold problems in Annehem and Hammarby Sjöstad?

http://www.fptak.se/default.asp?HeadPage=233&SubPage=204

 

[anaitis]

No, not at all as far as I can see.

 

[robsarve]

Nah, it's probably render directly on eps, yeah... The principle here didn't feel too bad now that I think about it, the question is where the moisture condenses and where it goes...

 

[anaitis]

the question is where the moisture condenses and where it goes...

At the point where the air's ability to dissolve moisture is exceeded by the actual moisture amount.
This will not occur with the intended wall.

The problem with single-layer plaster on cellular plastic has not been condensation (which normally does not occur on the outside of a wall) but the construction's sensitivity to leaking rainwater.