Structural Problems In The Economy, and How Britain Can Go Renewable

lasso
Roundup Time! (image by williac, CC 2.0 licensed)

Some more roundup links. These pages have been hanging around in my browser for weeks, waiting for me to blog about them. As with the links I posted earlier this week, I consider these “go to” articles and sites – continuously interesting and relevant.

Let me if you have a chance to read any of these pages or sites. I’d love to hear what you think.

Roundup: This Week’s Classics

Links
Links

I surf across hundreds of articles a week as I learn more and more about green building, energy efficiency, and climate change. Most are interesting, but a few become touchstones that I end up talking about with others, and returning to again and again. Some candidates for that status that I found in the last week are below:

Thermal Bridges, Passive Houses in the UK, and Spray Foam

On the fence
Chain link fence (get it?) - (image by James Jordan, CC 2.0 licensed)

As I’ve been surfing green building sites and articles over the last week, I ran across these interesting items. I hope you find them useful.

Thermal bridging occurs wherever assembly components with low R-values relative to surrounding materials span from the inside to the outside of a building assembly.

  • What’s the UK doing about energy efficient building, you ask? They have a zero net energy homes initiative, where all new homes in the UK are supposed to be zero net energy by 2016. Probably not going to happen on schedule, according to an article from NewStart magazine, described on the Barefoot & Gilles site. (H/T to Sue Butcher for the link, via Twitter.)

Flaws in the government’s zero-carbon vision have forced ministers back to the drawing board. Is there a realistic way forward?

One wall design that is sure to become more popular utilizes 2×4 studs, 2″ foam board as a thermal break, 7/16 OSB or other structural sheeting using 3.5″ screws for fasteners. Then the 2×4 stud cavities are sprayed with 2″ of closed cell foam. The total wall thickness ends up to be 6-9/16″, standard for window and door jambs. The R-Value of this quiet and comfortable energy wall is 24!

There are still questions about the GHG impact of making and spraying the foam, although The Foam Man also points out that all insulation techniques involve tradeoffs, and some spray foams have a high quantity of soy-based content, which lessens their footprint vs. petrochemical-based foams.

Let me know your thoughts in the comments.