Porcelain and emulsion...won,t go together

[Perfect Tiling]

Afternoon all. Here's a question you will have answered many times...
I have estimated tiling a cloakroom with 600 x 300 x 10mm porcelain tiles and know that others have estimated less than myself. However, I have included removing and replacing plasterboard as it is painted with contract emulsion. I have also included removing and replacing all the sanitaryware to tile behind (as I always do).
The other tilers??? have said they will just tile over the paint and it will be ok. Surely with the tiles and adhesive coming in at about 26kg per sq mtr its way too much to ask of the paint. Whats your opinions on this please?

On another note...anyone know of any good screwdriver bits that won't snap when screwing down hardibacker boards???

[doug boardley]

if they (the customers) expect you to tile onto paint, walk away from the job
Metal bits are best for screwing hardibacker

[timeless john]

Tiles of that size should not be fixed to emulsion covered plaster - if the customer is not prepared to have a suitable substrate that will take the weight of these tiles -you should state your point firmly and walk away in the knowledge that you have provided a professional service.

If you purchase the expensive Hardibacker screws, they have a screw bit in the packet.

[CJ CERAMICS]

if they will not listen then walk away, i am right this minute looking at the cardboard from a box of 600x300 10mm porcelain tiles and the box states that the weight is 32kg.
chris

[timeless john]

How many tiles per box?

[CJ CERAMICS]

yeah sorry just relooked at box the 32kg is for the 10 tiles and coverage of 1.2sqm

[mikethetile]

wiha make good bits

available from axminster tools

[Colour Republic]

yeah sorry just relooked at box the 32kg is for the 10 tiles and coverage of 1.2sqm

including addy???

[CJ CERAMICS]

including addy???

no thats just the weight of the tiles that i am fitting but the coverage is 1.2 sqm not 1sqm per box.
chris

[Perfect Tiling]

Thanks for all the sound advice lads...I knew I was right and held my guns. I would rather walk away than risk a tile that size falling and hurting a wee kid or damaging an expensive suite. I like to do things by the book and keep myself covered (not just in addy).

Customer wants me to do the job as it will be done properly. Currently retiling a bathroom that had been tiled with small tiles (150 x 150) onto emulsion...they only took 30 mins to come off and took paint with them...new plasterboard went on this job too...no corners cut. Thanks all once again!!!

[murf]

Why not remove the paint?

[doug boardley]

Why not remove the paint?

if it's emulsion onto plasterboard??

[murf]

Why not Doug? it would be worth trying spreading some tubbed adhesive on the boards, letting it soak for an hour, and then removing.Quite often the emulsion will peel away,leaving a perfect surface for tiling.

[Colour Republic]

Why not Doug? it would be worth trying spreading some tubbed adhesive on the boards, letting it soak for an hour, and then removing.Quite often the emulsion will peel away,leaving a perfect surface for tiling.

only if it hasn't been painted properly

[murf]

Still worth trying first, just to be sure to be sure.