tiling a painted wall

[Bluedrifter]

is it ok to just key an emulsion painted wall and coat with pva prior to tiling in a bathroom, or should the paint be stripped off to bare plaster

 

[gaz man]

strip paint and DO NOT PVA BUT PRIME good luck

 

[davy_G]

Im with Gaz here, keep the PVA away, primer it with a proper tile primer aftre keying and removing any flakey paint.

 

[david campbell]

http://www.tilersforums.com/tile-ad.../2511-p-v-versus-primers.html?highlight=p.v.a

 

[Bluedrifter]

many thanks for the advice. Saved me lots of heartache. Glad I asked.

 

[Bluedrifter]

Also, he says pushing his luck, what's the best way to hide hot & cold water pipes for the shower, in the wall, as well as the central heating pipes for the towel rail & radiator? The wall is made of 4" insulation block. Would expanding foam be ok to fill the chasing and OK to tile over? Where the bath was, there's not any plaster, could I tile over the sand & cement render?
Any advice would be welcome. Thanks

 

[faithhealer]

Also, he says pushing his luck, what's the best way to hide hot & cold water pipes for the shower, in the wall, as well as the central heating pipes for the towel rail & radiator? The wall is made of 4" insulation block. Would expanding foam be ok to fill the chasing and OK to tile over? Where the bath was, there's not any plaster, could I tile over the sand & cement render?
Any advice would be welcome. Thanks

Shouldn't be a problem as long as the chasing is 'neat. If you plaster over the pipes cover the copper pipe over with insulation tape or similar. Don't think expanding foam will have any adverse effects on pipe work. No probs on the concrete render

 

[WHID to?]

Sorry to bump this one up but I am looking for some clarification on tiling onto an emulsioned wall.

During my PTS course, I was told its fine to tile onto emulsion as long as its sound and any flakey stuff is removed. BAL White Star product sheet concurs as do a few of the posters on here.

Other people on the site say remove mechanically, scrape off or use cheap addy to coat and then strip.

Is there a definative answer or is the jury still out?