Dense pack wall insulation in old Victorians and stucco homes

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:

  • A lot of these homes were built using balloon framing which means they're drafty.  Like crazy drafty with straight shots through the walls from the attic to the crawlspace/basement.
  • We are in the San Francisco Bay area which means that for the most part, these homes are subjected to pretty damp conditions for considerable portions of the year. 
  • Damp conditions + drafty old homes = homes that are able to give the damp a clear exit path.

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. 

Thanks!

Views: 438

Reply to This

Forum Discussions

Electro Magnetic Fields (EMF)

Started by Barry L NewDelman in General Forum. Last reply by Brad Cook 5 hours ago. 4 Replies

When is it too windy to use blower door?

Started by Brandon Walton in General Forum. Last reply by Kent Browning 11 hours ago. 15 Replies

Affordable Housing Funding

Started by SUZETT MOFFITT in General Forum. Last reply by John Nicholas 17 hours ago. 5 Replies

Latest Activity

Brad Cook replied to Barry L NewDelman's discussion Electro Magnetic Fields (EMF)
"EMFs are everywhere and in varying strengths and frequencies. In my experience a small percentage…"
5 hours ago
Victor Rols Lindsay commented on A. Tamasin Sterner's photo
Thumbnail

improper venting

"whiskey tango foxtrot. This is why we all get ridiculed. Less knowledgeable people  abound.…"
7 hours ago
Victor Rols Lindsay commented on Eric Aune's photo
Thumbnail

infrared

"I guess a picture IS worth a thousand words"
7 hours ago
Victor Rols Lindsay commented on Michael Dunseith's photo
Thumbnail

Proof is possible Tour - Corbett Lungsford

"So... what did you find? This will be fascinating, with some surprises?"
7 hours ago

Photos

Loading…
  • Add Photos
  • View All

© 2017   Created by Lawrence Berkeley National Laboratory.   Powered by

Badges  |  Report an Issue  |  Terms of Service