What happens if you don't pva before plastering

Question

Why do you need to use pva first?

Sam · Accepted Answer

The plaster will not bond to the surface properly if it is not primed (pva/sbr/blue grit etc)

In some cases  it will dry as soon as you apply the plaster as the surface will take all the moisture from the plaster

Plamen · Answer

The plaster won't stick well to the wall. High suction causing the plaster to crack or peel away.

Adam · Answer

It will definitely not strick to the surface and will fall off ,only time to not use pva is on new plasterboard

Tom · Answer

The plaster will dry as soon you apply the plaster its impossible to do without... it will not bond without simply apply blue grit pva or spr

Kevin · Answer

If you fail to prep the wall with pva you can risk a layer of dust or dirt between plaster and wall which creates no bonding between the two surfaces which will fail and most likely to fall off

Matt · Answer

To prevent high suction. It stops the plaster drying too quickly , cracking and not  adhering

Lee · Answer

You need to PVA,SBR or blue grit first to seal the existing surface ready to skim,otherwise all moisture in the plaster will be sucked out causing it to dry out to quick and not stick,

Marcus · Answer

Plaster would not adhere to wall and would  have high suction so you would not be able to plaster as it would dry too quick and cause cracks

Joe · Answer

Because the new plaster will de laminate p.v.a is a key for new plaster to adhere to.

Lewis · Answer

You need to pva or sbr the wall first so the plaster will stick to the surface only time you don’t need to is on new plasterboard 👍

What happens if you don't pva before plastering

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