Builders for Climate Action have found that embodied carbon accounted for an outsized portion of greenhouse gas emissions for new low-rise construction.
A new white paper from the group says that the carbon footprint can be significantly reduced by using conventional materials. The highest embodied carbon came from a building with high-Portland-cement concrete, and extruded polystyrene and spray-foam insulation. A typical model included concrete with some supplemental cementitious materials (SCMs), along with mineral wool insulation.
A lower-carbon alternative, called a “drawdown building” incorporated high-SCM concrete, and cellulose and wood fiber insulation. The carbon-storing model included:
· Insulated concrete forms with high-SCM concrete
· Expanded glass sub-grade insulation
· Straw and wood fiberboard insulation
· Wood cladding
· Compressed straw panel interior walls
· ReWall interior finishes
· Wood windows
· Linoleum and Forest Stewardship Council-certified softwood flooring
· Cedar shake roofing
An energy-efficient drawdown building located in Toronto and using renewable grid electricity would avoid 614 metric tons of carbon emissions over 30 years, according to the report. One caveat: Drawdown buildings rely heavily on wood products, and there are emerging questions about whether wood is universally a carbon-storing material.
Related Stories
| Mar 4, 2014
Massachusetts Congressional delegation asks FEMA to slow flood zone map requirements
After a recent successful challenge of the scientific methodology used to redraw the coastal high-hazard zones, the Massachusetts congressional delegation is asking federal officials to put the brakes on new flood zone maps for the Bay State.
| Mar 3, 2014
Injury-liability law responsible for higher construction insurance cost in New York
Construction contractors and developers in New York state face $3 billion more in costs and 667 more accidents per year because of a state law that holds builders solely liable for such accidents, according to a study commissioned by the New York Civil Justice Institute.
| Feb 28, 2014
GBI issues guide to help federal agencies meet sustainability mandates
The Green Building Initiative has released “The Guiding Principles Compliance for New Construction,” for federal buildings to help federal agencies meet sustainability mandates in the construction of new buildings.
| Feb 28, 2014
Steel Joist Institute standards open for review
The 2015 draft of the Steel Joist Institute’s “Single Joist Standard Specification for K-, LH-, and DLH-Series and Joist Girders” will be available for public review until May 31, 2014.
| Feb 28, 2014
Metcalf Construction wins key reversal from federal appeals court in Hawaii on military contract
Metcalf spent more than $76 million on a military construction project and sued to recoup costs.
| Feb 19, 2014
Obama Administration moves to boost fuel efficiency standards on heavy-duty vehicles
The Obama Administration wants to boost fuel efficiency of medium- and heavy-duty trucks for models made in 2019 and later.
| Feb 19, 2014
Net Positive Energy + Water is latest green certification standard
The advancement of sustainable construction has reached a new milestone with the development of Net Positive Energy+Water, a new green building certification standard that aims to improve net zero approaches to energy and water conservation.
| Feb 19, 2014
Obama’s climate resilience panel says PVs, cool roofs should be part of solution
Among the suggestions were rooftop solar energy systems and cool roofs, which could be encouraged by policies from local governments.
| Feb 19, 2014
OSHA proposes three-year postponement of crane operator certification requirement
OSHA’s proposal to postpone the compliance date for crane operator certification by three years was made official on Feb. 7 when it was published in the Federal Register.
| Feb 19, 2014
USGBC introduces new online educational platform
The U.S. Green Building Council has introduced “Education @USGBC” a new educational platform.