Bulge in exterior fiberglass...

westend wrote:

WoodGlue wrote:

westend wrote:
Adzel used in a composite wall structure is not immune to mold should the correct temperature and humidity be reached

I strongly disagree with this statement. I also thing Hanwa Mfg, the makers of Azdel would disagree with your statement as well.

Azdel IS IMPERVIOUS to water, mold and mildew.



For an example of Compositek, an Azdel like substrate;

Compositek Video

WoodGlue

You can disagree strongly or not but just because the Mfg. states it is "impervious" doesn't mean fungus can't propagate ON it if temperature and humidity are in the proper growing range. Since your wall is a composite wall structure there are layers into which water can migrate and then there is the possibility of mold.
Mold needs three things beyond spores (they are everywhere) to establish: Correct temperature, correct humidity, and correct surface. Eliminate any one of things and you won't have mold.