Re: Thanks for the video Alastair
When looking for our first house in N Ireland we walked away from two. The first one we didn't realise was prefab until getting a survey which pointed out that the roof ridge was a steel tube, presumably propping up the gables against each other. Fortunate - it was before the Troubles got under way and I think it was a bit further south in Co Down than would have been healthy for me in my subsequent career. The other was very obviously largely composed of asbestos panels; a pity as it came complete with an Iron Age ring-fort.
OTOH they can be very good properties; an aunt and uncle lived in one for most of their married life until they had to move to sheltered accommodation. The whole street of semis is still there and not immediately prefab unless you're told.
The wonky prefab lab with a metal frame and precast panels was a different matter - a slight shifting of weight on the floor would cause the reading on a balance on the adjacent bench to change.
Biting the hand that feeds IT
