Can lath and plaster be skimmed over?

Question

Karl · Answer

Hi Joyce,
Yes, existing lath and plaster can be skimmed over. However, there are a few things to consider:

The walls/ceilings would need to be in reasonably sound condition and adequately prepared. The odd superficial crack is fine provided these are raked out slightly and bridged over with fibre tape (aka scrim). 

If any part of the surface has become 'live' (or has debonded from the lath) these sections would need to be carefully repaired, by removing affected areas then patching - using bonding coat, or plasterboard, or sometimes both. 
Ideally, the walls would be keyed by scratching with a scraper, a nail, or a float with embedded nails. Then the surface needs to be prime coated to control suction, which is achieved using either PVA or SBR and water solution, or a suitable PVA grit. Then the surface can be skimmed over.

Often (when it is viable to do so), plasterers will recommend overboarding such surfaces (particularly ceilings), as this can both reduce costs and risks to both the craftsperson and customer.

Hope this helps.
Kind regards,

Jagvinder · Answer

Ideally board over or completely Remove old lath and plaster fix new plasterboards and then skim 

Plastering Skimming and Building Service's

Dennis · Answer

No it ideally need to be taken down as you will add weight with the new plaster and could all co.e down

Ryan · Answer

Yes it can be skimmed over if it is still solid and well adhered to the Laths, and if the ceiling get’s prepared properly!

Peter · Answer

Yes ,but it will need roughing up with a chipping hammer , then 2 coats of pva before skimming ,also any cracks would need to be scrim taped first

Daniel · Answer

Yes it can! But it all depends on its integrity an inspection would only take a couple of minutes and depending on whether it is safe to do so and won't cause the ceiling to collapse with extra weight it can be done however I'd its integrity is compromised you have 2 options overboard with plasterboard using double the amount of screw you would usually use screwed into the joists or pull everything down and apply new plasterboard to the existing joists anymore question please don't hesitate to find fresh lines plastering &drylining

Joseph · Answer

Yes if can best to fill in any cracks with bonding an skin over but I would recommend reboarding an skiming

Carl · Answer

Yes it can take out any loose plaster then use a bonding coat Skrim the cracks pva the wall then re plaster it

Lewis · Answer

personally id rather remove due to the weight of all ready existing lath and plaster  then adding 20 kg plus probably  fixed with tacks rather than screws  so would not advise but can be done

Lori · Answer

Yes lath and morta walls can be plasterd over, use blue grit as its a primer and good grip in the grit to skim

Can lath and plaster be skimmed over?

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