Comments on: 20) Mooney walls/thermal bridging, breaking http://www.buildinggreenbc.com/2009/12/07/20-mooney-wallsthermal-bridging-breaking/ Case Study: How two people (and legions of talented tradespeople) are building a new green home in British Columbia. Tue, 07 Sep 2010 22:20:48 -0700 http://wordpress.org/?v=2.8.6 hourly 1 By: Anne http://www.buildinggreenbc.com/2009/12/07/20-mooney-wallsthermal-bridging-breaking/comment-page-1/#comment-40 Anne Thu, 21 Jan 2010 23:18:47 +0000 http://www.buildinggreenbc.com/?p=168#comment-40 I saw this used in a co-housing development in New Hampshire, but 2x2s on 2x6s, with cellulose. I saw this used in a co-housing development in New Hampshire, but 2×2s on 2×6s, with cellulose.

]]> By: Gail http://www.buildinggreenbc.com/2009/12/07/20-mooney-wallsthermal-bridging-breaking/comment-page-1/#comment-22 Gail Tue, 22 Dec 2009 18:10:58 +0000 http://www.buildinggreenbc.com/?p=168#comment-22 Hi, John We were more-or-less too late to use the mooney wall. Ideally, the walls will be 2x4, with the thermal breaking horizontal 2x2 adding the other 1.5". The anchor bolts were already set in the concrete at the 2x6 width, and our 2x6 lumber was already purchased, and much of it used for formwork first. I think our framer wanted to make me feel better about it, so he suggested (and quite rightly) that in our climate, where it seldom goes below 0 degrees, the added labour to add the horizontals plus the minimal difference in actual R value would never be justified in the amount of energy loss. We would lose valuable floor space because the walls would now be 8", and then the windows would have to have wider sills, adding to the expense. We're planning to use blown-in cellulose for the walls, and spray-on foam for the ceiling, so the R value will be pretty good anyway. Depending on where you live (colder climates, for example) and assuming you'll be doing the labour, it would be energy-efficient and cost-okay. The other thermal break I would have liked to use is Dow's Structural Insulated Sheathing, used on the outside. It is neither available in Canada, nor approved as a sheathing for our building code. But maybe when you get there... Hi, John
We were more-or-less too late to use the mooney wall. Ideally, the walls will be 2×4, with the thermal breaking horizontal 2×2 adding the other 1.5″. The anchor bolts were already set in the concrete at the 2×6 width, and our 2×6 lumber was already purchased, and much of it used for formwork first.
I think our framer wanted to make me feel better about it, so he suggested (and quite rightly) that in our climate, where it seldom goes below 0 degrees, the added labour to add the horizontals plus the minimal difference in actual R value would never be justified in the amount of energy loss. We would lose valuable floor space because the walls would now be 8″, and then the windows would have to have wider sills, adding to the expense. We’re planning to use blown-in cellulose for the walls, and spray-on foam for the ceiling, so the R value will be pretty good anyway.
Depending on where you live (colder climates, for example) and assuming you’ll be doing the labour, it would be energy-efficient and cost-okay.
The other thermal break I would have liked to use is Dow’s Structural Insulated Sheathing, used on the outside. It is neither available in Canada, nor approved as a sheathing for our building code. But maybe when you get there…

]]> By: John http://www.buildinggreenbc.com/2009/12/07/20-mooney-wallsthermal-bridging-breaking/comment-page-1/#comment-21 John Tue, 22 Dec 2009 05:43:05 +0000 http://www.buildinggreenbc.com/?p=168#comment-21 I am interested in Mooney Wall technique. Do you have any comments or tips based on your experience? Thanks I am interested in Mooney Wall technique. Do you have any comments or tips based on your experience?

Thanks

]]> By: Joy http://www.buildinggreenbc.com/2009/12/07/20-mooney-wallsthermal-bridging-breaking/comment-page-1/#comment-19 Joy Tue, 08 Dec 2009 05:05:33 +0000 http://www.buildinggreenbc.com/?p=168#comment-19 Link typo for MooneyWall http://www.builditsolar.com/Projects/Conservation/MooneyWall/MooneyWall.htm Link typo for MooneyWall

http://www.builditsolar.com/Projects/Conservation/MooneyWall/MooneyWall.htm

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