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
Codes and Standards | Jun 7, 2019
Market conditions indicate slower growth in industrial real estate sector
E-commerce, market oversupply, rising interest rates to dampen hot market.
Codes and Standards | Jun 3, 2019
Haskell invests in BLOX, creator of modular-based delivery method
‘Represents important part of Haskell’s future strategy,’ says CEO.
Codes and Standards | Jun 3, 2019
Florida may eliminate certificate of need requirement for new hospitals
Bill could boost specialized facilities.
Codes and Standards | May 31, 2019
RELi 2.0 standard for sustainability, resilience being piloted
Will be open to LEED-registered or -certified projects, with introductory pricing and support.
Codes and Standards | May 31, 2019
Pankow Foundation releases report, tools for embodied carbon impacts
Focus is on MEP and tenant improvements.
Codes and Standards | May 24, 2019
USGBC receives funding for LEED for Cities and Communities Program
Bank of America provides $500,000 grant to certify 15 U.S. cities.
Codes and Standards | May 24, 2019
AIA updates Interiors Contract Documents
Six revised documents available for interior construction projects.
Codes and Standards | May 23, 2019
Northern California casino offers a template for resilient microgrids
Solar power with batteries and backup generators provide weeks of self-reliance.
Codes and Standards | May 23, 2019
Austin creates innovative plan to boost affordable housing
Approach includes loosened zoning, incentives for higher density in lower-cost and mixed-income developments.
Codes and Standards | May 20, 2019
Effort launched to develop better process for zero-carbon retrofits in multifamily sector
Rocky Mountain Institute, Dept. of Energy, California Energy Commission join forces.