Do you need non-combustible insulation on upstands?

Do you need non-combustible insulation on upstands?

Jun 30, 2021 | Flat roofing

Do you need non-combustible insulation on upstands?  This is a question worthy of the QI TV show, and one that would definitely get Alan Davies the famous Klaxon and flashing lights because the obvious answers of yes or no would both be incorrect. At present, based on...