Plasterboarding a ceiling

northwest1965

The ceiling has been completely removed & we are getting quotes for work.

What thickness boards should be used for the job?

stuart45

What's your joist spacings?

northwest1965

https://forums.moneysavingexpert.com/discussion/comment/82050704#Comment_82050704

60x 105cm

Thanks

stuart45

I'm not sure what you mean by 60x105cm. If you measure the joists centre to centre, they will normally be 16 inches, or 400mm.

They could be more or less. Generally at 16 inches 9.5mm plasterboard is fine, and a bit lighter to use. If the spacing are greater they might recommend using 12.5mm plasterboard. The people quoting should be able to advise you as well.

Just a bit of info, the building trade does not use cm's in the UK, it only mm's. You might confuse the spreads with cm's.

northwest1965

https://forums.moneysavingexpert.com/discussion/comment/82050713#Comment_82050713

So 600mm is the measurement.

One plasterer said he needs 12.5 other said 9.5🤷

stuart45

12.5 is better at 600mm. There is a fair bit of difference in the weight when you are lifting it over your head, but personally I'd use 12.5 if the joists are 2ft apart.

FreeBear

Just a bit of info, the building trade does not use cm's in the UK, it only mm's. You might confuse the spreads with cm's.

Schoolchildren and dressmakers use centimetres, everyone else uses millimetres - Although, some of us also mix in feet & inches just to confuse Gen Z 🙂

If @northwest1965 is ripping down an upstairs ceiling, use the opportunity to stuff another 100mm of loft insulation between the joists. If it is a downstairs ceiling, think about using an acoustic insulation. If the old ceiling was plaster & lath, plasterboard will increase the amount of noise you hear, so measures need to be taken to reduce noise transmission.