[lm28469]

Jokes aside you don't usually plaster the inside of an attic, unless it's a liveable attic, but that's far from the norm.

A lot of people spray foam in old attics as a set and forget insulation measure: https://www.stellrr.com/wp-content/uploads/2021/04/AAF45418-...

[arethuza]

I wasn't joking - I've been in two top floor flats in the UK in older buildings (central Edinburgh) that had ceiling plaster collapse due to roof problems.