plaster and gloss

[vik2001]

I have 3 walls in my house that have been glossed. i heard that you cant plaster over the gloss painted walls. so what will i have to do to prepare the wall for plastering. i cant be hacking the wall back, so can i pva the glossed wall??? will this work?

 

[jbonding]

you can use Bond-it or Betakontact its similar to pva but needs to be left overnight before you can skim.

 

[Richard C]

The good news is you don't need to "hack the wall back" but you need to create some serious scoring/roughing of the surface. Use an old trowel or scraper & criss- cross score all over the wall, penetrating the paint & back into the plaster. Space the score marks around 20mm apart & when you’ve done that, go over the whole wall with a VERY stiff wire brush so it looks a complete & dull mess. Give it a coat of 3:1 PVA & leave to dry thoroughly for at least 12 hours, the longer the better. Just before skimming, PVA with a 5:1 mix, preferably applied with a roller but don’t over brush & skim when tacky.

You must, however, talk to your plasterer regarding prep. Work & what, if any, he’s prepared to let you do; then follow HIS instructions explicitly.

 

[vik2001]

will applying pva neat to the wall not do the trick?? i tried to sand the walls down with some heavy duty sandpaper, but it didnt do much good. i did try as well to key the wall, but it was such a hard job to do. the plaster there is very tough, it maybe render behind there...

 

[DaSpozz]

For the love of god, why would people gloss a wall....

But still, have you tried using a hot air gun and scraping it off?

 

[Richard C]

I assumed you meant vinyl gloss emulsion! Are you talking about oil gloss paint? If so, that could be rather more of a problem & you may have to strip it right back. I’ve plastered gloss & eggshell emulsion successfully before but never gloss paint so am unsure if it’s possible; perhaps others can advise.

 

[JohnD]

would it not be less effort to hack it all off and get it done properly?

 

[vik2001]

Rich im not sure what kind of gloss it is, how would i tell if its vinyl gloss or oil paint gloss? yes i could hack it off, but it would be such a nightmare, as i believe its render behind there. i had a go wit a hammer and boster but was tough work.

 

[roy c]

Well get the professionals in. You asked this question on another post you put up. You seem to be askin' the same questions !!!!! I put my answer on that post but you obviously didn't read it..

Re:- plaster advice....