Green / Eco-Friendly

Wall thickness/construction on new construction

  • Last Updated:
  • Sep 18th, 2018 10:42 pm
[OP]
Member
Dec 19, 2015
332 posts
173 upvotes
Calgary, AB

Wall thickness/construction on new construction

I’m in the process of deciding whether to knock our old 1950s bungalow down and build a two story house instead. That gives me the option of choosing features with greater “eco” value. Obviously I’ll be talking to designers/architects, but I’m trying to work out whether to spend the extra and go for a specialist in low energy houses, or just a normal designer and a few tweaks.

If you were building from (mostly, basement is stil 2x4 R12 insulation, so no passivhaus) scratch what wall construction would you go for. My one worry is if I went for 12” double stud/ twin layer 2x4 I’ll lose a lot of interior space with the additional 8” of wall which presumably would end up on the interior, not the exterior? Other options would be 2x6 with cellulose and 2” solid on the exterior or just a thinner 8” 2x4 scissored wall.

Anyone done any of this and have an idea of the additional costs involved with these options over just a standard 2x6. I know I’ll never get the money back in energy savings, but I’m happy to pay a little over for comfort and “eco cred”. Alternatively would it be better to just save the money and get better triple glazed windows (I’d probably go triple anyway).
3 replies
Deal Expert
Aug 2, 2001
15020 posts
5288 upvotes
Since you're in Calgary I would talk to fellow Net Zero people to see what their thoughts are. When I have talked to them I believe they said you can get to 80%-90% Net Zero for a very small cost, it's being total Net Zero that drives the price up greatly.

For example, here is an individual in Edmonton that went with extremely thick walls:
http://www.greenedmonton.ca/MillCreekNetZeroHome.html
[OP]
Member
Dec 19, 2015
332 posts
173 upvotes
Calgary, AB
Thanks, do you have any recommendations of who to contact in this regard?
Deal Expert
Aug 2, 2001
15020 posts
5288 upvotes
Andy34 wrote:
Sep 18th, 2018 10:59 am
Thanks, do you have any recommendations of who to contact in this regard?
Here's is the twitter account for the individual with the NetZero home in that article (he's active so message him):
https://twitter.com/conradnobert?lang=en

The link above (in my original post) has many details on his house. I believe it was built by Habitat: http://habitat-studio.com/

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