Should I Use A Primer? - Tile Advice

[feral]

Hi, will be tiling my bathroom and am wondering if I need to use a primer? Most of the bathroom is painted plaster, so will score the walls and sand those areas before tiling. The other area around the bath already has tiles, and will be removing those. I am using Mapei Kerequick adhesive, but am not sure if I need to prime the walls before applying the adhesive or not. And if so…which primer should I use? Have looked on Lilley & Stone and they have a few, but it's a bit confusing. Any guidance much appreciated!

 

[hmtiling]

Defo primer!
I'd be using an acrylic one such as weber pr360 but probably best to stick with the same brand so go with eco prim t.

 

[J Sid]

All depends on what tiles you plan to use and what the paint is

Any idea?

 

[hmtiling]

All depends on what tiles you plan to use and what the paint is

Any idea?

think he's sanding the walls

 

[feral]

thank you - porcelain tiles, and yes will be scoring/sanding the walls.

 

[J Sid]

I believe your chosen tile will probably be to heavy for a plastered wall, let alone a painted wall.
I would be stripping all areas to be tiled right out and reboarding, or over boarding.

You will many that are happy to just prime and tile

 

[feral]

thank you - i have 8mm porcelain…i just looked it up, and it's borderline :/ no one explained about weight and suitability of what they are being attached to when i bought them, guess i should have researched a little better.

 

[Old Mod]

thank you - i have 8mm porcelain…i just looked it up, and it's borderline :/ no one explained about weight and suitability of what they are being attached to when i bought them, guess i should have researched a little better.

Actually, I think it's the retailer who should point out suitability of substrates, especially if they are purely a tile retailer.

 

[J Sid]

Actually, I think it's the retailer who should point out suitability of substrates, especially if they are purely a tile retailer.

Trouble is, most, but not all, just want your money.

 

[Old Mod]

Oh I know Julian, just think it's about time they took some responsibility.

 

[J Sid]

thank you - i have 8mm porcelain…i just looked it up, and it's borderline :/ no one explained about weight and suitability of what they are being attached to when i bought them, guess i should have researched a little better.

Boarder line onto perfect plaster with no paint. Who can tell how well the plaster was fix ?
Don't risk it. Do it once and do it right.

 

[feral]

thank you, should I look in to some tile backer boards? Can these be fixed to my plaster walls..or does all the plaster need to come off first?

i've already noticed 6mm and 12mm thick boards…is 6mm ok for walls? i saw this stuff… http://www.tilegiant.co.uk/pdf/nmp/nmp_guide.pdf

and this 6mm Jackoboard backing board for tile | Jackoboard tile insulation board

(sorry, I'm a useless girl, so learning as I go! )

 

[Tile Shop]

Plaster should come off first unles you can screw through to a substantial surface behind.

Without screws, you're relying on the plaster to hold the weight of the board, the tiles and 2 layers of adhesive.

So now we need to know, whats behind the plaster?

 

[feral]

thanks, i believe it is either brieze block or brick - all solid walls i.e. not stud walls. the flat was built in 1953 so it's pretty solid construction.