calculating palsterboard

[billozz]

i have to board a ceiling that is 3.5 mtr x 3mtr can anyone tell me how many boars i need please, i used a calcultor i found on here and it said 8 and the local builders yard said 4, im confused.
thanks
Bill

 

[chappers]

yep 4 basically depending on fixing points. they are 2.4 x 1.2 m

 

[^woody^]

You probably don't want to be lifting 8x4 sheets onto a ceiling.

 

[noseall]

We always endeavour to use 900mm x 1800mm plasterboards on ceilings. 900mm 2400mm as a last resort.

Look at the centering on your timbers. 450mm (18") centres would indicate 900mm x 1800mm plasterboards and 400mm or 600mm (16"/24") centres would indicate using 900mm x 2400mm plasterboards.

Staggering the joints (essential) will mean a wee bit more wastage, so factor this in.

 

[billozz]

We always endeavour to use 900mm x 1800mm plasterboards on ceilings. 900mm 2400mm as a last resort.

Look at the centering on your timbers. 450mm (18") centres would indicate 900mm x 1800mm plasterboards and 400mm or 600mm (16"/24") centres would indicate using 900mm x 2400mm plasterboards.

Staggering the joints (essential) will mean a wee bit more wastage, so factor this in.

thanks for the reply, whichever size i use how many will i need?

 

[Gerrydelasel]

how many will i need?

Draw a plan to scale on a bit of graph paper and you will work it out for yourself.

 

[billozz]

btw centres are 39cm is that an unusual gap?

 

[JohnD]

16" floor joist spacing. Quite normal. Fits an 8x4ft board perfectly. The metricised sizes are almost exactly the same, apart from the name.