Quick tiling question

[rich_vw]

When tiling on to newly platered walls is it best to 'white wash' the wall prior to applying tile adhesive??

Cheers

[B17NNS]

Nope. Will result in a less strong bond.

The adhesive will be stuck just to paint instead of plaster.

[timbobalob]

^^^^^^^

I'm sure this chap is far more in the know than I am, but my impression was that new plaster would absorb moisture out of the adhesive, compromising it's strength.

Would be happy to be told to be incorrect though!

[B17NNS]

By all means use a bonding agent to reduce suction such as this:

http://www.wallsandfloors.co.uk/catrangetiles/tile...

Don't use PVA though.

Personally unless you are using Stone or very large format tiles I wouldn't bother.

[Gav147]

Agree with B17nns, don't paint it the tile adhesive will then only bond to the paint not the plaster, you will get a better bond applying it direct to the plaster. Just apply a small area at time though so as it doesn't start setting before you get to it.

ETA - link to data sheet from basf tile adhesive stating that emulsion paint must be removed prior to application of adhesive. Click

Edited by Gav147 on Friday 25th March 17:02

[Emsman]

Go straight over it.
Use a notched trowel, small area at a time- make sure the ribs in the adhesive all go in one direction. That way you don't get air trapped behind and it's far easier to get them flat.
Any help you need- feel free to pm me

[Zip106]

Don't forget there's a weight limit per m2.

I had to rip all the old plasterboard from my bathroom walls and re-build with new plasterboard and no skim as my tiles were just over 32kg/m2. (Mahoosive rectified tiles)

http://www.tiles.org.uk/help/answer-weight.shtml

[rich_vw]

Cheers all, my thought was no paint but my brother put some doubt in my mind.

[Piersman2]

Zip106 said:

Don't forget there's a weight limit per m2.

I had to rip all the old plasterboard from my bathroom walls and re-build with new plasterboard and no skim as my tiles were just over 32kg/m2. (Mahoosive rectified tiles)

http://www.tiles.org.uk/help/answer-weight.shtml

Are you really saying that after you somehow found some calcs which informed you that your tiles were marginally too heavy becuase you walls were skimmed you decided to strip all the plaster and plasterboard underneath off and replaced with new plaster with no skim?

I must be missing something, surely?

I'd have said fk the recommendations , checked the skim seemed solid, and bunged the tiles up, especially if only just over the 'limit'.


Some folks most have money to burn.

[Zip106]

Piersman2 said:

Are you really saying that after you somehow found some calcs which informed you that your tiles were marginally too heavy becuase you walls were skimmed you decided to strip all the plaster and plasterboard underneath off and replaced with new plaster with no skim?

I must be missing something, surely?

I'd have said fk the recommendations , checked the skim seemed solid, and bunged the tiles up, especially if only just over the 'limit'.


Some folks most have money to burn.

Belts 'n' braces, me.

That, and I couldn't be 100% sure that all the skim on all the walls was perfectly adhered.
I did all the ripping out and re-build, so cost was zero.

Besides, limits are there for a reason!

Edited by Zip106 on Saturday 26th March 09:11

[Jasandjules]

How new is the plaster? I'd be leaving it at least a week before sticking plaster on and in an ideal world I'd run a de-humidifier in there too.... Yes, I am just waiting a few more days for the plaster to set in the en-suite before I stick some tiles up!

[Emsman]

I wouldn't use a de-humidifier, it will pull moisture out too fast result being potential weakness/shrinkage cracks

[Jasandjules]

Emsman said:

I wouldn't use a de-humidifier, it will pull moisture out too fast result being potential weakness/shrinkage cracks

Ah good point, I just had a blonde moment and was thinking of the shower being used and moisture on the walls needing to be removed, but plainly that isn't going to happen without tiles... Ignore me.

[Emsman]

It's a fair point and it does happen, but drying naturally is far better all round.
I suggest buying beer with the money saved from the de humidifier- it's the only way

[rich_vw]

Jasandjules said:

How new is the plaster? I'd be leaving it at least a week before sticking plaster on and in an ideal world I'd run a de-humidifier in there too.... Yes, I am just waiting a few more days for the plaster to set in the en-suite before I stick some tiles up!

Plaster is now about 4 weeks old so I would have thought plenty of time for the drying process (not used a de-humidifyer but windows opened at every opertunity)

[Emsman]

Perfect.