Recommend a primer for tiling plastered / painted wall?

[siremastimus]

I was looking to tile the area inbetween my worktop and kitchen units. It was plastered around a year ago and at the time had mist coats applied before a final coat of Dulux Soft Sheen - can this be tiled on top of as the upstand doesnt really allow for the extra depth backer boards would need? Tried the tape test and the paint stayed on the wall but I am guessing it would be best to use a primer still on the walls - if so can an expert out there recommend the best primer for this requirement? Thanks

PS Tiles are 400mm x 100mm x 7mm Ceramic if this matters,

 

[Ajax123]

primer wont assist the tiles sticking to the paint. you need first to ensure that the paint is well adhered to the wall. if it is then this can act as the primer. i would rub it down with a sander first and vaccuum it before though.

 

[cam_low]

Since its just a splash back you will be fine in priming the wall with 1:1 Ardex p51. Tile away jobs a goodun.

 

[siremastimus]

Hi, yes paint is well adhered to the wall, I read on here about sticking some duct tape on the wall and removing to see if the paint came away which it didnt so hopefuly is on there quite well - would people not recommend using a primer on painted surfaces then?

 

[siremastimus]

Hi Bosha, thanks for reply. It is ceramic tiles that will be going up - 400mm x 100mm x 7mm, would you still say go for the ardex p51?

 

[Ajax123]

take the corner of a paint scraper to it and see if it flakes off the wall. if not it is well adered. as its a splashback my personal opinion as its a "DIY" job i would use a tubbed addy from the likes of wickes or b&q......... i shall now await the pro tilers backlash.

 

[White Room]

I would use cement based adhesive IMO

 

[siremastimus]

Was probably going to use Mapei Keraquick as addy, so to prime or not to prime?

 

[Ajax123]

reason i would go tubbed is because it is acrylic dispersion and will stick more effectively to paint than it would to screed or plasterboard although i am open to correction. problem with paint i guess is its lack of porosity which would prevent to some extent the hydration products of cement embedding in the paints surface. generally paint (emulsion) is generally acrylic dispersed as well

 

[cam_low]

prime if using tubbed, cementuous dont prime, that stuff will stick anything to anything. I personally prime everything. habit ! Its holding no serious weight so you will be fine. DIY job so you will be fine !!