is it possible to 'over prime' a wall? Advice and information on tiling and fixing tiles to a variety of surfaces

[chris_on_tour2002]

just sealing my bathroom ready for tiling. using a latex primer. tiling over ply here and there so used a 1:1 mix. used the same mix on the walls.

i primed the walls twice with this mix - both times the primer made the plaster wet and it soaked in.

it was brand new plaster so i thought i'd give it a good couple of coats.

now reading the manufacturers instructions it says use 1:4 mix - much weaker and only one coat for plaster. 1:1 for wood.

so are my tiles going to fall off? will the second coat of latex peel from the first? as both coats soaked in i doubt it, just wondered if anyone has any relative experience.

[richm]

If this helps, I've been told before by a tiler friend that unless the sealant on a newly plastered wall is thin enough to soak in abit & dry with the plaster to form one solid backing, there is a chance that if the sealant is too thick & is tiled over there is a possibility that all can 'peel' off in time including the tiles I'm afraid .

Hope this helps

[rosebery]

Chris

What primer are you using?

Cheers

[rosebery]

Richm

What "sealant" are you talking about?

Cheers

[richm]

you can now buy a specially formulated matt emulsion for new plaster which he waters down & adds pva before tiling. It's the same as a decorator's 'miss' coat on new plaster, as , if you just paint a newly plastered ceiling with a 'vinyl' matt emulsion, there is a chance it will peel off as the vinyl in the paint stops it soaking in the plaster & therefore is on the surface of the plaster
Regards