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: 446

Reply to This

Forum Discussions

What made this chimney fall down?

Started by Eric Kjelshus in General Forum. Last reply by Eric Kjelshus on Tuesday. 7 Replies

How would you insulate this roof?

Started by David Butler in General Forum. Last reply by Dave Taylor on Sunday. 61 Replies

Manual J (SD) for custom, luxury homes

Started by Dav Camras in HVAC. Last reply by Dav Camras Nov 10. 3 Replies

Quantitative methods for residential zoning

Started by Brett in HVAC. Last reply by David Butler Nov 9. 1 Reply

Home Energy Pros and #MeToo

Started by Mike Rogers in General Forum. Last reply by Mike Rogers Nov 9. 3 Replies

Latest Activity

Profile IconSonny Roncancio and Chester Energy & Policy joined Home Energy Pros Forum
2 hours ago
Ryan Moore updated an event
Thumbnail

LEED for Homes Green Rater Training at Fort Collins, CO

December 7, 2017 to December 8, 2017
Green Insight will host this 2-day training in Fort Collins, CO December 7-8,…See More
22 hours ago
Rodney Bailey liked Rodney Bailey's discussion Energy audit equipment for sale.
22 hours ago
tedkidd liked Mike Rogers's blog post Focusing on payback to motivate customers?
yesterday
Home Energy Magazine's blog post was featured
yesterday
Home Energy Magazine posted a blog post
Wednesday
Quinn Korzeniecki added a discussion to the group Building Performance Institute (BPI)
Thumbnail

Rebates and Incentives: Illinois

Curious about home performance incentives and rebates available in your area? Check out this BPI…See More
Wednesday
Profile IconStacey Cordeiro and Melissa Ames joined Home Energy Pros Forum
Wednesday

Photos

  • Add Photos
  • View All

© 2017   Created by Home Performance Coalition (HPC)   Powered by

Badges  |  Report an Issue  |  Terms of Service