Hardiplank Sweating?

[losthenfound]

thread167-95884
As noted in the above named thread:
Hardie – James Hardie Siding otherwise known as Hardiplank has moisture issues from the environment. Many of these problems come from within the home, or from around it. Algae will grow on just about anything if it has moisture, warmth, and food. Take away any one of these and you have not the problem.

See:

http://fourseasonsroofingandsiding.com/Siding.Leaks.htm

http://fourseasonsroofingandsiding.com/Phantom.Siding.Leaks.htm

 

[kenvlach]

You are blaming the sympton or victim, not the root cause. Read your links carefully. The cementitious siding is not the problem's cause. The problem is lack of a good vapor barrier inside the home. With wood siding, you would be worse off -- it would be rotting.

My experience is limited (1 house), but about the only inexpensive retrofits are to install/fix/upgrade bathroom ventilation fans and apply aluminum paint on interior walls. The aluminum paint reduces moisture permeation by about 90% (if I remember correctly). Paint over with latex if you don't want the metallic appearance.

Of course, outside moisture may also support mold growth, but again, you would be worse off with wood.