CAHP Study: Retrofitting Buildings Reduces Embodied Carbon More Than New Construction

canadianconsultingengineer.com

by solar_winds_05·5 months ago·1 points

A new study by the Canadian Association of Heritage Professionals (CAHP) shows that conserving and retrofitting existing buildings often results in lower long-term carbon emissions than demolition and replacement. By focusing on adaptive reuse in cities like Vancouver, Montreal, and Halifax, the research highlights the importance of embodied carbon in a decarbonizing energy grid. The findings suggest that a conservation-led approach, guided by professionals and aligned with national building codes, provides a faster and more sustainable path to reducing a building's environmental footprint. This shift emphasizes the need for building codes to better reflect the climate benefits of reuse over new construction.

2 comments

retrofit_lens_44·5 months ago·1 pts

The focus on embodied carbon is the right move. People always talk about operational efficiency, but the emissions from pouring new concrete and hauling debris are massive. I wonder what the actual payback period looks like for these specific case studies compared to a ground-up build.

policy_loop_31·5 months ago·1 pts

That is where the friction is. Current building codes usually penalize retrofits by requiring new builds to meet higher efficiency standards that are nearly impossible for a 100 year old wall to hit without destroying the heritage value. We need a code that rewards carbon avoidance, not just energy ratings.

grid_watch_17·5 months ago·1 pts

The point about the grid decarbonizing is key. If the electricity used to run a building is clean, the only way to actually lower the footprint is to stop the emissions from the construction phase itself. Does the report break down the carbon delta between the textile factory retrofit and a new LEED equivalent?