P'boarding a ceiling - noggins?

I have owned three houses and none have had noggins either between joists o r round the perimeter. The site book gives you the ideal situation which th ey have to to cover themselves but nobody does it. It's a bit like the inst ructions on paint tins regarding preparation before painting anyone slavish ly following the instruction to the letter would never make a profit. It's a cop out for the manufacturers when things go wrong who can simply say " A h! Did you follow that instruction? No! Sorry can't help"

Richard

replying to mailbin, Iggy wrote: Add the noggins. Or, add full length timbers. Either is common practice today, it's much better and stronger. Yes, even today it's skipped and plaster-boarders "float" the ceiling edges as a lazy shortcut, since they don't care about fire sealing or blocking and only pursue a pretty package that's patently defective and inferior methodology.

You can do it either way.

NT

I would say you want support at the edges of the room, but don't need it at every short joint. (especially if you are using scrim and skim after)

Without support you'll never keep edge cracking at bay. Ditto elsewhere if the gaps are large. But you can be cheap/quick and do it anyway.

NT

Since expansion and contraction of the entire ceiling is going to result in edge cracking, I don't how perimeter noggins will help.

If you are concerned about fire-stopping the perimeter then fit gypsum coving all round. Sorted.

Without support you also add flexing up/down of the PB, which makes matters much worse.

NT