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Hi,

I hope someone can explain where I am going wrong (also the grief I'm getting from my wife is amazing.), I seem to be having massive problems getting tiles (20cm by 50cm)to stick to a plaster wall, I have tried Mapei Ultimate Shower Proof and Mapei Ultimate Supergrab, this is the order of things have been so far

Plaster Wall:-

Mapei Ultimate Shower Proof: Tiles came off after 2 days, as Tile https://www.tilersforums.com/forums/tile-adhesive/ was damp
PVA'ed the wall, use Mapei Ultimate Supergrab: Tiles came off after 2 days, as Tile https://www.tilersforums.com/forums/tile-adhesive/ was damp
Sugar Soaped the walls, allowed to dry, then used Mapei Plaster Primer allowed to dry, used Mapei Ultimate Supergrab: Tiles came off after 3 days, as Tile https://www.tilersforums.com/forums/tile-adhesive/ was damp.

I have included a pic, of the wall so hopefully that might explain better.

From the picture, I can see that i have not had good grab, but the Tile https://www.tilersforums.com/forums/tile-adhesive/ was all damp

Also can I reuse the tiles , as i have scraped the damp plaster off?

Any tips, tricks gratefully received, I need to earn my "man card" back in the eyes of the wife, :)

Thanks for looking
 

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Are your tiles Porcelain ?? or Ceramic If Porcelain should really use a powdered https://www.tilersforums.com/forums/tile-adhesive/ as opposed to a ready mixed
 

Sean Kelly

TF
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https://www.tilersforums.com/forums/tile-adhesive/ (ready mixed) is only suitable for ceramic wall tiles of 300x300 (millimeters) or less. Most tilers would not even use ready mixed https://www.tilersforums.com/forums/tile-adhesive/ on this size tile. The reason being is that the ready mixed https://www.tilersforums.com/forums/tile-adhesive/ cures (gets hard) by air. Powered https://www.tilersforums.com/forums/tile-adhesive/ (mixed with water) cures by a chemical reaction.
Basically, you are spreading your tile https://www.tilersforums.com/forums/tile-adhesive/ on your wall and sticking a big tile on top. The air cannot get to the middle of your tile.

You have to get a powdered https://www.tilersforums.com/forums/tile-adhesive/ and mix it with water. Back butter your tile too (like you would butter bread).

Scrape that https://www.tilersforums.com/forums/tile-adhesive/ off the walls and your tiles. Prime the walls and you are good to go. I would use a 8mm or10mm notched trowel (depending on how flat your walls are.
 
OP
G
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Thank you for the info and why it’s not been working, I will go and buy some powered https://www.tilersforums.com/forums/tile-adhesive/ today and post the results here.

đź‘Ť
 
H

hmtiling

To add pva is not a suitable primer. Use an acrylic prime of sbr diluted to ratios stated
 

Rae

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Powder https://www.tilersforums.com/forums/tile-adhesive/ ,sticks ceramics very easy as so porous
 
T

TimmoB

This is the product info for Mapei ultimate shower, it says up to 600 x 300.

Product information
This wall tile https://www.tilersforums.com/forums/tile-adhesive/ is water resistant and suitable for ceramic and mosaic tiles.

Suitable for Ceramic
Water resistant
10 years guarantee
Features and benefits
Ready mixed wall tile https://www.tilersforums.com/forums/tile-adhesive/ D2T
High initial grab & non slip formula
Suitable for tile sizes up to 600 x 300mm
20-30 minute opening time with a 30-40 minute adjustment period
 
A

Ann Rolph

Some of my ceramic floor tiles are not completely stuck to the floor they sound hollow when you walk on them, is there anything I can do?
 

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