>The bulk of the work is wrapping the building in 25cm of rigid foam exterior insulation, replacing windows and making sure that they are fairly air tight. They aren't adding mechanical ventilation, as installation would cause too much disruption to residents who are living there.
Hmmm, like the worst possible idea (air tight + not adequate ventilation), the early (10-15 years ago) "Class A" or "Class B" new buldings made here without appropriate ventilation have given lots of problems (humidity/mould).
The only possible remedy being daily manual ventilation, i.e. open windows for 10/15 minutes every single day (but many people won't or cannot do it).
Hmmm, like the worst possible idea (air tight + not adequate ventilation), the early (10-15 years ago) "Class A" or "Class B" new buldings made here without appropriate ventilation have given lots of problems (humidity/mould).
The only possible remedy being daily manual ventilation, i.e. open windows for 10/15 minutes every single day (but many people won't or cannot do it).