Tub adhesive for Porcelain 600*300 tiles

[devmanoj]

My builder who is doing the bathroom (he claims he has been doing bathroom for 40yrs) requested me to buy 15kg Tub tile adhesive (after seeing the tiles) instead of the powder ones.

As per his request I bought the tubs which are costlier than the bags. I bought 8 tubs as per his request (one tub covers approx 8 square metres) My bathroom is 20 square metres. He has used 3 times more than recommended.

Now I came to know tubs are not good for larger tiles. What should I do…? Tiling is half done. I think he wanted to finish the job quickly hence using the tubs instead of powder.
What can I do? If the tiles look alraight for first 4 weeks, can I assume it will be ok for the rest of the life? or is there a chance that it could fall off in years time?

Please help.
thanks

 

[Gazzer]

What size tile and what are they made of ? ceramic ? Porcelain ?

 

[devmanoj]

size 600 * 300
Porcelain

 

[Gazzer]

There are adhesive manufacturers that claim that large format can be fixed with their tubbed adhesives but its not something I am happy with plus if he is using too much adhesive then he has excceded the amount specified.
You should not bed out with these adhesives.

What make was it ?

 

[devmanoj]

There are adhesive manufacturers that claim that large format can be fixed with their tubbed adhesives but its not something I am happy with plus if he is using too much adhesive then he has excceded the amount specified.
You should not bed out with these adhesives.

What make was it ?

On the Tub it says it's not suitable for Porcelain and ideal for 300*300
It's Mapei shower proof tubs

 

[Gazzer]

Well there you have your answer !

 

[devmanoj]

but is there a risk. it's too late to change the tiles. can they fall off in few years if they don't in next couple of weeks?

 

[ianflem]

600 x 300 porcelain with tubbed addy ! NO :yikes:

Tubbed adhesive usually states max tile size on tub...Have a look see what it state's !

He should be using cement based addy for porc's..What is the substrate..Plasterboard,Skimmed walls ?

 

[Dan]

Yeah I'm with Sir Ramic here. You need a decent cement based adhesive and one that will fix porcelain (as not all will be as good as the proper ones - Porcelain doesn't soak in water very well so it has to cure differently compared to stone or whatever).

 

[cam_low]

Using tubbed adhesive is not advised for large format tiles. Especially heavy porcelain tiles.

You will not find any tilers on this forum using tubbed adhesive for the fixing of porcelain.

Why is the builder not getting the materials himself. Are you paying £10/£15 per tub ? I would like to see a bucket of tubbed adhesive that will give 8m2 coverage. More like 2m2 on the required 10x10cm notched trowel I would be using to fix a 600x300 tile.

I guarantee all my work. Does he ? Are you happy with the quality of his tiling ? cuts ? tile lippage ? setting out?

Sounds to me the start of another bad times thread.

 

[Dan]

My builder who is doing the bathroom (he claims he has been doing bathroom for 40yrs) requested me to buy 15kg Tub tile adhesive (after seeing the tiles) instead of the powder ones.

As per his request I bought the tubs which are costlier than the bags. I bought 8 tubs as per his request (one tub covers approx 8 square metres) My bathroom is 20 square metres. He has used 3 times more than recommended.

Now I came to know tubs are not good for larger tiles. What should I do…? Tiling is half done. I think he wanted to finish the job quickly hence using the tubs instead of powder.
What can I do? If the tiles look alraight for first 4 weeks, can I assume it will be ok for the rest of the life? or is there a chance that it could fall off in years time?

Please help.
thanks

That's a long time to do a bathroom too. You sure he knows what he's doing?

(messing!!)

 

[devmanoj]

it's a skimmed wall.

600 x 300 porcelain with tubbed addy ! NO :yikes:

Tubbed adhesive usually states max tile size on tub...Have a look see what it state's !

He should be using cement based addy for porc's..What is the substrate..Plasterboard,Skimmed walls ?

 

[devmanoj]

Howlong do you provide guarantee?
Yeah he says he can guarantee.
Should I get it in writing? And do you think if it does not fall off next few days it could fall off in
a years time?

Using tubbed adhesive is not advised for large format tiles. Especially heavy porcelain tiles.

You will not find any tilers on this forum using tubbed adhesive for the fixing of porcelain.

Why is the builder not getting the materials himself. Are you paying £10/£15 per tub ? I would like to see a bucket of tubbed adhesive that will give 8m2 coverage. More like 2m2 on the required 10x10cm notched trowel I would be using to fix a 600x300 tile.

I guarantee all my work. Does he ? Are you happy with the quality of his tiling ? cuts ? tile lippage ? setting out?

Sounds to me the start of another bad times thread.

 

[Gazzer]

If he has used that much adhesive it will never fully dry , at best it will "crust " over. The adhesive would need air to get to it to dry , that swhy you dont fix large format or grout before adhesive has set.
Too expalin it more simply, Open a bucket of adhesive and leave open for a week......go back and I bet the top of the adhesive will have a crust and a few mm below wil be perfect !......Its all wrong and I bet I could come into that bathroom in six months time and remove all the tiles with a paint scraper.

 

[Dan]

It's the drying as said in the thread already. It will take too long to cure and shrink.
Tubbed adhesive dries by evaporation and soaking into the tile and wall. Porcelain on it's own even small tiles don't soak in well enough for it to bond. And then a massive porcelain just triples the problem.

It would suggest he's done it to make the job slightly quicker to do. And perhaps a lot cheaper.

A genuine wall and floor tiler who is qualified wouldn't dream of using tubbed adhesive on large-format tiles, let alone porcelain ones.

Also plaster skimming takes 20kg per square meter. I'd also check the total weight of tiles, adhesive, grout etc. As it could be over.