Question about PVAing

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wastedenergyuk

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I'm about to have a go at skimming my spare room and have applied a couple of coats of pva to 1 wall where i'm going to start. Is it normal for the pva to soak straight in leaving the wall looking like it's had nothing put on it in the first place?
 
can i plaster onto the pva if its dry? I'm new to plastering and I dont think i'd have time to pva the wall then mix the plaster before the pva dries.
 
wastedenergyuk said:
can i plaster onto the pva if its dry? I'm new to plastering and I dont think i'd have time to pva the wall then mix the plaster before the pva dries.
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thats a can of worms on here.......

Old school say you should skim on tacky PVA but from my experience that is just because thats teh way its always been done and no other reason!

I often skim on dried PVA and because once the skim is laid over the PVA the PVA livens up again...... So in effect your doing the same as skimming over it tacky...

Lots of people will dissagree with me and many will agree its personal choice but as a newbie you will find it easier to get the timing right if its gone hard :-)
 
i dont mind either way , also it depends on the back ground . if you have a glossy paint finish on give it one coat ,the pva has nothing to dry into , any more coats n you will be there till xmas waitin for the skim to pick up!. If you have dry walls like old lath n plaster i always give it at least three pva's. Been caught out before on me own doin a big staircase wall and the fecker goes off like a rocket .
 
skimming over smooth silk paint is my biggest pain in the neck with plastering, usally use nearly neat pva with a small amount of sand or i have used bonding in the pva before, seems to skim a little easier.
 
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