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**wivers** · 09-03-2007

If you use a tub adhesive on large format ceramic tiles, apart from the slippage what are the other problems?

Leatherface · 09-03-2007

The simple answer is Do Not Use It.
Tub adhesive dries using air - it in effect dries & the moisture evaporates outwards through your grout lines. Any large format tile applied using tub adhesive is likely only to dry around the perimiter of the tile & not the centre. Always used cement based. This dries using a chemical reaction & hence does not need air.
When using a cement based adhesive on Gypsum Plaster, make sure that you are using the manufacturers recommended primer. Some cement based adhesives will "blow" & tiles are likely to fall off. I use Mapei adhesives - they have a primer called Primer G - which I always use in these situations. Never had a problem.
Some people use PVA - I avoid this simply because Mapei advise the use of Primer G.
Hope this is of help

**wivers** · 09-03-2007

Yea it is mate thanks. Only trouble is i was advised by another tiler i know that it would be ok, so now i'm hoping the tiles r gonna be okay.

09-03-2007

Large format = powder adhesive. And PVA (cuz i'm to tight to by expensive primer)

Leatherface · 09-03-2007

Hi Mate
just to add to my previous point - if at all possible you could increase your waiting time befor grouting from 24 hours to uo to a week

Leatherface · 09-03-2007

Quote:

Originally Posted by Concept PHT

Large format = powder adhesive. And PVA (cuz i'm to tight to by expensive primer)

Will find out price for you. Not that more expensive, at leats the job is done correctly.
Hey, what's the point in talking about a tile Federation if you are not prepared to do things the correct way and cut a few corners to save a few quid ??
No offence meant

09-03-2007

That was mean' t to be light hearted mate... of course I use primer, as well as PVA. As and when it dictates.

Inabit.

Leatherface · 10-03-2007