Wetting the wall before plastering

Question

Do you need to wet the wall before you start plastering?

carlo · Accepted Answer

PVA seal 5prt water 1 part PVA for suction other wise plaster dry in crack

Alex · Answer

Hello, it’s depend if that wall is a new plasterboard just apply the plaster over
If it’s a old wall you ned to apply a primer or PVA

Michael · Answer

Wetting the wall before plastering is never a good idea. You would need to seal the wall with a PVA sealant before plastering depending on the wall plastering. If you have many big defects i.e. holes in the wall, you will need to use bonding before plastering. Please refer to a expert builder

Lee · Answer

If brickwork etc pva wall first an let go tacky before applying the plaster

Callum · Answer

always prime a wall with necessary priming agent for example most walls take a water to pva glue mix for a prime coat and more porous walls require the likes of blue grit

Paul · Answer

Hi,

If your wall is back to bear brickwork then the answer is yes, to remove any excess dust. If its blockwork its no and if it is existing plaster it needs PVA not wetting.

Hope this helps.

Joe · Answer

If it's a low suction wall. No need to wet
If it's a high suction wall. Use plasterers grit..

Paul · Answer

It completely depends on the wall you are plastering ie what background you are plastering over and also whether you are talking about interior skimming or exterior rendering. To be honest more information would be needed before I could accurately answer this question.

Karl · Answer

If the wall is brick or there are building blocks exposed, the answer is yes: you should wet the wall before plastering to prevent the plaster from drying too quickly.

A bare dry brick or block will suck water from the mortar and proper adhesion will not take place.

Aaron · Answer

Know if the walls are already plastered then use a PVA on the walls if the walls are painted then you have to use a blue grit paint so the plaster can stick to the walls not the paint if the walls are are plaster boarded then just plaster over the boards with two coats of plaster

Wetting the wall before plastering

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