Tiling on plasterboard

[grumpygrouter]

Can somebody give a definition of "skim" please?

 

[Fekin]

I would have thought \ classed any coat of plaster onto plaster board was a skim as it's normally only 2 or 3mm thick.

to take up or remove (floating matter) from the surface of a liquid, as with a spoon or ladle: to skim the cream from milk.

😛

 

[grumpygrouter]

Apart from your dictionary quote which I knew and expected someone to post, that is what I thought as well.