We’d really like to improve the energy efficiency of our building but finding it tricky because of the need for unanimity among all the owners (most of whom are landlords). We are even more shocked to discover that even if we do insulate the building at most, we can achieve a “G” rating…

Are old houses really that much worse than passive builds even when you upgrade them with all the latest insulation and heating technology?

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[https://imgur.com/a/mLv0nzB](https://imgur.com/a/mLv0nzB)

4 comments
  1. You could probably get a second opinion as it does sound weird that you would only make it to G with extensive renovation. Still, it might indeed require even deeper renovations and possibly installations of solar panels and changing the heating system to get an even higher rating. I think if you heat with mazout it is impossible to get a decent rating.

  2. You need unanimity for things like windows, which all units may need to change. More structural, works such as roof insulation, most likely you only need simple majority.

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