Thanks so much Bob! I’m really pleased CECC is looking into this further. Embarrassingly I hadn’t realised there was a cladding section to the updated CLF baselines. That might have sped this up!
It’s a shame that MCA messed up the weights of steel vs aluminium in their EPD though! I’m sure this this has thrown others like me off. I’ll use the MCA EPD results, which are the basis of the CLF baselines and your recommendations.
I don’t know enough about the aluminium industry in the US but the MCA results (18.3kgCO2e/m2, 2.77kg/m2, 6.60kgCO2e/kg) are lower than industry averages in Canada (83.3kgCO2e/m2, 10.61kg/m2, 7.85kgCO2e/kg) and Europe (40.5kgCO2e/m2, 4.05 kg/m, 10kgCO2e/kg). Not by much if you look at it on a per kg basis though. Clearly the weight of cladding makes a huge difference.