skim is coming off

[beddy]

spunkys right, your meant to let the 1st coat dry before u apply the second coat, so it doesnt matter if its done the day before or the same day aslong as its dry,

 

[radroller]

as i am a novice plaster , could someone inform me the time scale of the first coat going on to the second coat of skim , i thought it was when the first coat and slighty hardened dut you could still work it with your finger

 

[beddy]

it should stiffen up slightly but not too much. you should still be able to leave a mark with your finger.

 

[church]

Depends on the suction from the substrate but on boardwork normally its around 30 mins this time of year , there is no exact science to it , just experience.

 

[Gibbo]

spunksters right

 

[radroller]

so in your experience , i remove the shelled skim and find solid skim ,thistle bond it and re skim

 

[ziggy2]

No mate, remove any loose skim, if your first coat of skim is still intact, tile it. If all your skim comes off, give the wall a good drink with a roller and water, when the dry backing coat remains damp to the touch but not wet through, skim as normal. Don't wait 40mins between coats.

 

[plasterjfe]

yeah but the point is you apply skim to tacky or moist pva yeah. never onto a dry shiny pva surface? thats my point like

 

[rockhardsolidplastering]

dont know about you guys but lately when going over tacky /moist pva i find the plaster behaving strange kind of going off immediatly and being cottage cheesy