By 2050 all buildings will have zero impact on the climate, thanks to a combination of energy efficiency measures and clean energy generation.
That is the vision of a major new project from the World Green Building Council (WorldGBC), which yesterday announced plans to rapidly accelerate the trend towards ‘net zero’ certified buildings.
Entitled Advancing Net Zero, the project will initially see Green Building Councils from Australia, Brazil, Canada, Germany, India, Netherlands, South Africa, and Sweden work with NGO Architecture 2030 to develop net zero certification standards and promote building technologies and techniques that drastically reduce emissions across the construction and property sectors.
Terri Wills, CEO of WorldGBC, said the project builds on the commitment made by 74 Green Building Councils at last year’s Paris Summit to slash emissions across the industry by 2050 in line with the goals of the Paris Agreement.
“The success of our ambitions to keep global warming to within 1.5 to 2 degrees will depend on our ability to advance net zero buildings – those which generate clean energy and produce no net emissions,” Wills said. “Net zero buildings will be a defining contribution in our efforts to tackle climate change. Getting down to zero won’t be easy.
“This will be a long and challenging road but together with the dedication and expertise of our Green Building Councils and partners, we can create a thriving market for highly efficient buildings and make net zero the new normal.”
In addition to supporting the development of ‘net zero’ certifications, the project aims to provide ‘net zero’ training programmes for building professionals and demonstration buildings that prove ultra-low impact buildings can be successfully developed.
The group is also looking to quickly expand the project beyond the eight GBCs initially involved.
The stated long term goal is to ensure “all new buildings and major renovations should be net zero starting in 2030, meaning no buildings should be built below net zero standards beyond 2030 [and] 100 per cent of buildings should be net zero by 2050”.
In order to meet the target, the group has also set goals to train 75,000 building professionals trained in ‘net zero’ practices by 2030, rising to 300,000 by 2050, and ensure all national Green Building Councils that operate certification schemes have a net zero tool in place by 2030.
Romilly Madew, chief executive of the Green Building Council of Australia, said the targets were ambitious but achievable. “We have strong and credible evidence that we can reach net zero in our built environment by 2050, while delivering healthier, more productive cities using technologies that exist today,” she said. “We have the skills, the technology and the knowledge. Now it’s time to take action.”
A home that comes close to being Net Zero is highly sustainable just based on that alone, but Reclaimed Modern house designed by architecture firm Dwell Developments goes a step further, as it is also constructed from reclaimed wood, concrete and metal. It is located in the Columbia City area of Seattle, Washington.
The Reclaimed Modern home measures 3,140 square feet (290 square meters), has four bedrooms, a separate garage, and a spacious rooftop deck. It was built primarily from materials with a high amount of recycled content, while they also reused lots of materials collected from demolition sites of older buildings.
These repurposed building materials include metal and wood from a deconstructed barn in the nearby Willamette Valley. The corrugated metal they collected from this barn was turned into exterior cladding of the house, as well as to build the garden fence. The overhang above the rooftop deck was made from repurposed barn wood. The builders also used repurposed concrete for the pathway leading to the home, and they reclaimed this from a removed public sidewalk.
Reclaimed Modern home is fitted with a 7.29 kW rooftop mounted solar array, which the designers hoped would be enough to give this home a net zero level of energy consumption. Since it has only been lived in for a short time, there is no actual data to show whether they have succeeded. But the home has a HERS score of 15, which is excellent and the designers are also planning on adding another 4 kW of solar panels , which should bring this score to 0.
The builders also applied Enviro-Dri coating to the exterior of the home, which forms a weather-resistant barrier and seals the building against moisture. The home was also fitted with triple-glazed windows, while a blower test revealed wall airtightness to be at 2.5 at 50. The house took nine months to complete and was finished in October 2014.
Source: Jetson Green
Book your seat here.
Join the discussion here.
Follow Alive2Green on Social Media