Accounting for C1- Demolition for an interior fit-out project

Buildings Assessments
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Hi,

I am working on a renovation project of an office located in Australia, where only a few elements in the building are getting demolished and reconstructed. For example: some of the interior partitions are demolished and new partitions are installed, while most of the ceiling and floor is retained. How can I account for the demolition of these elements?

I read about assigning demolition factor under construction site operations tab and then choosing the scenarios, but if I am not wrong it is taking input as overall building area.

I am using Level(s) A1+A2 tool for this particular study and it is not going for any certification. How should I proceed with this?

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Hi Udita,

Accurately calculating demolition emissions (C1) is tricky. While you can use C1 values from Environmental Product Declarations (EPDs), their accuracy is uncertain since the actual demolition happens far in the future.

A more practical approach is to estimate emissions based on the area being demolished. Typically, you’d use the entire building’s area, but in your situation, you can calculate the emissions specifically for the square meters being demolished, excluding any retained parts.

You have several options for demolition emission scenarios:

  • RICS (UK): This scenario provides average deconstruction and demolition emissions based on monitored projects in central London. It’s a good “typical” option.
  • SYKE (Finnish): This system offers different emissions based on building types (offices, residential, schools) and is based on data from CO2data.fi.
  • Proprietary Scenarios: Our own scenarios are based on the building’s frame type. Our data specialists calculated emissions based on the machinery, fuels, and fluids used for the demolition of various building structure types.

For your project in Australia, the choice is yours:

  • If your construction is in a major Australian city, we recommend using the RICS profile and inputting the exact square meters to be demolished (excluding retained sections).
  • Alternatively, you could compare the results with the Finnish office profile or the proprietary scenario that best represents your building’s structure.

I hope this is of some help, do let me know if you have any further questions!

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Thanks Steven, this is helpful!