Between other commitments i'm trying to read up on hygrothermal performance of materials after recent discussions on here regarding rainscreen membranes, types of cladding, plastering over 'breathable' boards, etc.

Heres a nice easy one showing tests on brickwork, rainscreen membranes and sketch details for protecting openings in the wall.
http://www.buildingscience.com/documents/primers/bsp-063-water-managed-wall-systems/view?searchterm=stucco

I have the relevant BSi docs too if anyones interested and i'll post links to a few of the other relevant docs, in particular results from measuring moisture in straw bales.

Relevance ? Well how about the vast number of UK properties having their cavities filled as the gov's first step in tackling climate change.
Tony's house - cavity fill > any moisture sensors built into the construction ? V. interested to see output.

Moisture > humidity > health.