I think this is the specification of composite panel used on the building, it's PIR
https://www.celotex.co.uk/products/rs5000
Now look at the difference in performance between rockwool and PIR
https://www.youtube.com/watch?v=0shn-0UFHh4
Wow...
@deleted started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
I think this is the specification of composite panel used on the building, it's PIR
https://www.celotex.co.uk/products/rs5000
Now look at the difference in performance between rockwool and PIR
https://www.youtube.com/watch?v=0shn-0UFHh4