Tagged embodied energy

Saving the world with carbon-smart materials like straw

Architecture 2030 chart of the impacts of various forms of insulation

It sounds far-fetched at first, but building with straw and other bio-based, carbon-sequestering materials can help fight climate change. We can go beyond “doing less harm” with building, we can actually do some good.

Check out this chart from Architecture 2030’s Carbon-Smart Materials Palette showing that straw bales not only cause less carbon dioxide to be emitted, they actually sequester carbon in the wall. Read more about the carbon impact of strawbale on Architecture 2030’s website.

“Beyond Energy Efficiency: Why Embodied Carbon in Materials Matters”

 

For an in-depth discussion of embodied carbon in building materials, check out this thorough but accessible article on embodied carbon written by Ace McArleton and Jacob Deva Racusin of NewFrameworks to understand how.

 

Let’s do some good while building natural, beautiful, healthy homes!

 

video from the Excellence in Energy Leadership award 2018

We were honored to receive an Excellence in Energy Leadership award from SDG&E in recognition of our recent Net Zero strawbale project, the Fallgren Home. As part of the award, they made this short video that promotes the project (as well as SDG&E).

There is plenty wrong with our current energy system and it’s easy to find fault with the utility providers, so it was a nice counterpoint for SDG&E to help promote high-performance natural building. Click on the image to watch the video on YouTube

 

Can construction really be “regenerative”?

“The term regenerative development, on the other hand, carries within it a clear aim of regenerating the health and vitality of the nested, scale-linking systems we participate in. At a basic level regeneration also communicates not to use resources that cannot be regenerated, nor to use any resources faster than they can be regenerated.” Daniel Christian Wahl, “Beyond Sustainability? — We are living in the Century of Regeneration.”

At its most basic, construction requires taking a lot of stuff from somewhere and using it to build. It is an inherently destructive and consumptive process: no stuff = no building.

Because of this, it is has been hard to imagine truly regenerative construction: building in a way that not only does less harm to our ecosystems and environment but is actually a positive force, helping to repair some of the damage already done.

But now that we have started to explore the potential for strawbale and other biomass building materials to take carbon dioxide out of the atmosphere and safely lock it up, the term ‘regenerative’ seems like less of a stretch. According to preliminary research done by the California Straw Building Association, a bale of straw locks up approximately 60 times as much carbon as was emitted making that bale. As long as that bale is used in a way that it will not break down — in a wall, for example — the carbon is safely stored. It’s a net positive way to sequester carbon that has the convenient side-effect of making beautiful, energy-efficient homes.

In addition to sequestering carbon above ground in the form of the visible plant, carbon is also ferried down into the soil by the roots. Research is just starting to scratch the surface of the potential for soil to sequester carbon. The next step is to question what role agriculture can play in helping (or harming) that process. Transitioning to bales made with perennial plants grown in a polyculture could increase the amount of carbon stored in the soil. Currently, it would be difficult — if not impossible– to find enough bales made this way to build a house, but it is an admirable goal.

Everyone wants to live in a strawbale house! A butterfly emerges from its chrysalis.

The green building movement started by focusing on making buildings use less energy (operational energy), then only recently moved into exploring building with materials that are made with less energy (embodied energy which translates into embodied carbon), and is now just starting to look at building with materials that absorb more carbon than they created (carbon sequestration). From this new viewpoint, a mindfully-designed, carefully-placed, skillfully-built bio-based building can truly earn the label “regenerative.”

 

 

 

More info:

“Beyond Sustainability? — We are living in the Century of Regeneration”   by Daniel Christian Wahl

The New Carbon Architecture: Building to Cool the Planet,” by Bruce King and friends

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