On the www there seems to be conflicting advice about the need for noggins = when plaster-boarding a ceiling. Obviously you join the boards along the li= ne of a joist but what about the joints that run the other way - do they ne= ed noggins or not? What about at the edge of the ceiling?
I am thinking of a situation with 12mm plasterboard and joists at 400-450mm= centres.
What do people think? =20
Robert
All joins/edges need support otherwise any covering will crack due to the differential movement.
Mathew
differential movement.
thank you Mathew,
differential movement.
Other option is leave a 1/4" gap at joins with no support, and overfill with bonding coat (forced through and out the back, flush on the face), which will bond the board edges. Use scrim tape across joins when applying finish coat.
Best practice would suggest using them, although in reality people often don't since its lots of extra hassle. As Andy suggests, a gap, scrim tape and some bonding plaster usually does the trick. The edges of the room are normally supported by the wall and hence less vulnerable.
(you can get away with 2x2 noggings rather than full depth ones)
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