Plasterboarding

[ab12]

DIY project- need some tips please.

 

So I need to plasterboard my ceilings. Problme joist are in good condition but old and when I put a level on the ceiling joists are not all level. 

 

Now If I fix plasterboard its not going to be level.

 

How do I overcome this? Use packers between the plasterboard between the ceiling joists? 

 

 

[crispy_wafer]

22*75/100mm strips of timber perpendicular to the joists @ 400mm centres with packers to make a flat level surface, 75mm/100mm so there’s plenty of scope for not being just so with measurements for board endings.  Or you could use res bar and pack out, or mf5 top hat and pack out.