plasterboard + skimming underside of staircase/steps

[holy85]

Hi everyone,

I've just moved into a new house, at the moment the understide of the staircase is covered with old crumbing plaster, that has broken away due to movement of the steps im guessing.

I want to take all the old crumbling plaster off and start again.

Would it be okay to use normal plaster board, or should i use a ply or different type of wood instead, or should i do something completly different.

what would be the best solution here?

 

[roughcaster]

Normal 12.5mm plasterboard will be perfect. You can also get 9.5mm plasterboard too, but i'd go for the 12.5mm,, stronger. You might need to add a few bits of timber here and there to fix to, but if not, then screw up in place, tape it if necessary, then skim it over, perfect job.