GBA Logo horizontal Facebook LinkedIn Email Pinterest Twitter Instagram YouTube Icon Navigation Search Icon Main Search Icon Video Play Icon Plus Icon Minus Icon Picture icon Hamburger Icon Close Icon Sorted

Community and Q&A

Double stud wall document

Martin Holladay | Posted in Energy Efficiency and Durability on

Readers might be interested in seeing a report on the double-stud-wall details used for the Riverdale Net Zero house in Edmonton, Alberta:

There isn’t necessarily anything new here, but it’s worth checking out.

GBA Prime

Join the leading community of building science experts

Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field.


  1. Chris Laumer-Giddens | | #1

    Thanks Martin!

  2. Riversong | | #2

    It looks like the Riverdale house suffers from one of the primary problems with double stud walls: extension of the floor decks through the thermal envelope to the exterior, thereby creating repetitive on-center thermal bridging.

    It also uses moisture-vulnerable OSB and an interior poly vapor barrier which most cellulose manufacturers warn against (and will void the warranty on one).

    I thought we learned those lessons in the 80s and moved beyond them (except for the preponderance of OSB, which came later).

    I've designed several double-wall homes that don't suffer from those deficiencies - it's not difficult to do.

  3. GBA Editor
    Martin Holladay | | #3

    For those who have been following the Riverdale project in Edmonton, Alberta, here's a January 21, 2011 update received in an e-mail from Peter Amerongen:

    "Our Riverdale project seems to be using more heating energy than predicted. Early measurements from both Mill Creek and Belgravia seem to be showing higher than H2K predicted heating energy. I don't know where the short fall is. It could be lower passive solar gains is certainly using more heating energy than predicted. It could be lower internal gains than predicted, lower HRV efficiency or just higher heat transmission losses. We need to find out what we can do better. It may be that HOT2000 is over predicting passive solar gains or under predicting heating energy in super insulated houses. It is also possible that we aren't rigorous enough with our inputs."

Log in or create an account to post an answer.


Recent Questions and Replies

  • |
  • |
  • |
  • |