Here's a question for you in two parts:
We do a lot of dense pack wall insulation in these old Victorian homes (most are 70+ years old, some are around 100 years old) and we are worried about the long term effects. Here's our concern:
Yes, we realize that if it can get out that means it can get in - we get that. But here's our concern: these drafty old homes have lasted this long. Granted, we air seal (as possible) and we install vapor barriers just as often as the dense-pack wall insulation, but if we come in and install dense pack cellulose, do we run the long term risk of moisture issues and causing unintended consequences? Should we also be installing some form of vapor barrier in the wall? BPI tells us that the dense-pack cellulose acts as both insulation and air sealing - but, again, what about that moisture aspect?
The other half of this question applies to dense-pack cellulose installed in stucco homes. Again, how concerned should we be about long term moisture issues?
We might be being a little paranoid but we just want to be thorough and do our best to really understand all of the consequences of our actions.