Plastering over painted plasterboard

D13exile

The walls in my utility and downstairs toilet in my money pit, sorry house, are in poor condition (gouged marks, holes, cracks etc) and I want to replaster the walls. However can I do this over the existing paint on the wall? In my last house, the walls were chased by the builder to install additional plugs and skimmed over. However when I went to paint the room, the new plaster over the chased channels flaked off driving me nuts in the process. If I replaster these rooms, will the same happen when I go to paint them?

DublinDilbert

Yes, tissle bond them, put scrim tape over the cracks / holes. Febi bond is the same as tissle bond, only cheaper....

kingbhome

DublinDilbert wrote: »

Yes, tissle bond them, put scrim tape over the cracks / holes. Febi bond is the same as tissle bond, only cheaper....

What he said but also can be done with uni bond under the skim. One coat then the second coat tacky and your good to go for skimming on

the_pen_turner

kingbhome wrote: »

What he said but also can be done with uni bond under the skim. One coat then the second coat tacky and your good to go for skimming on

no it cant . damp will disolve it and break the bond

colm_c

Be handier to just takedown the existing plasterboard and put up new.

kingbhome

the_pen_turner wrote: »

no it cant . damp will disolve it and break the bond

Did it in my own 30yr house twice in my ensuite, utility room and kitchen and never had a blow out. Have did it in my sisters house and on customers houses aswell. Never one call back yet. You can unibond painted walls for skimming. Its exterior work you wouldnt use unibond because outside, the unibond can reignite and loosen the render or what ever coating on top!

kingbhome

colm_c wrote: »

Be handier to just takedown the existing plasterboard and put up new.

YEp, if its in a bad way, sometimes its just better reboarding.

the_pen_turner

kingbhome wrote: »

Did it in my own 30yr house twice in my ensuite, utility room and kitchen and never had a blow out. Have did it in my sisters house and on customers houses aswell. Never one call back yet. You can unibond painted walls for skimming. Its exterior work you wouldnt use unibond because outside, the unibond can reignite and loosen the render or what ever coating on top!

non of the plaster, tile ahesive or paint manufacturers reconmend it.
you mightnt have had an issue but is it worth taking the risk. thistle bond it and do right. give the wall a good sanding too

kingbhome

the_pen_turner wrote: »

non of the plaster, tile ahesive or paint manufacturers reconmend it.
you mightnt have had an issue but is it worth taking the risk. thistle bond it and do right. give the wall a good sanding too

I know but they are just covering all angles. Thistle bond decent gear but youve to wait 24 hours on teh stuff do you not. Only used it a handfull of times but always remembered need to wait longer than uni bond

the_pen_turner

kingbhome wrote: »

I know but they are just covering all angles. Thistle bond decent gear but youve to wait 24 hours on teh stuff do you not. Only used it a handfull of times but always remembered need to wait longer than uni bond

whats the rush.

kingbhome

the_pen_turner wrote: »

whats the rush.

whats the ruh. If one needs to earn a crust then putting the thistle bond on 2 walls takes half hour and no skimming untill a day later. Unibond, just wait untill tacky and good to go. thats the rush

the_pen_turner

kingbhome wrote: »

whats the ruh. If one needs to earn a crust then putting the thistle bond on 2 walls takes half hour and no skimming untill a day later. Unibond, just wait untill tacky and good to go. thats the rush

why not do it right though .

kingbhome

the_pen_turner wrote: »

why not do it right though .

O here we go :pac: It does get done right, thats why i use uni bond instead of thistle bond.

DublinDilbert

The other advantage to thistle bond is that it has grit in it. It's not that expensive either, https://www.goodwins.ie/products/febond-blue-grit-plaster-bonding-agent-5-litre-tub-thistle-0025044.html?name=Thistle+&type=simple

Your paying enough for the plaster and plasterer, it might be ok to use pva, but why risk it?