Tiling on bonding..

[beanz]

I was always told NEVER tile on a bonding coat, but i know people that do it all the time, and never seem to get any problems!?! What is the reason for not tiling it? I thought it was too soft/unstable, yet it's the strength in a plaster wall!?!
What's your understanding???

 

[Andy Tiler]

It's an undercoat for finish!
As you say to unstable and chalky I've never tiled onto bonding! Only the cowboys do that IMO

 

[cam_low]

Just pva it man. Itll be fine lol

 

[beanz]

Is it just a numbers game then? For all these people that tile on it, and get no comebacks, there are gonna be some out there failing... Just never seem to hear about the fails!?!

 

[Alan.P]

A numbers ( and letters ) game of sorts, it's in the chemistry

WIKI

 

[beanz]

I know about Ettringite. Are you saying the primer doesn't work on bonding?

 

[Alan.P]

I'm saying I wouldn't like to risk it for the sake of getting the background right in the first place, just my thoughts.

 

[Gazzer]

You should really only go with what the manufacturers of adhesive being used and the plaster used. British Gypsum state it is not a suitable surface to directly tile on.
You dont usually hear of failures from tilers, well who would shout about it ??
The choice is yours.

 

[beanz]

You should really only go with what the manufacturers of adhesive being used and the plaster used. British Gypsum state it is not a suitable surface to directly tile on.
You dont usually hear of failures from tilers, well who would shout about it ??
The choice is yours.

That's true enough I guess. I wasn't saying that I was going to tile on bonding, just that people do... With so many people out there doing things incorrectly, it's practically impossible to compete on price.

 

[Mr Tiler]

yes mate but I suppose if you explain the correct procedure.... they take it on board and would rather have someone do it for cheaper but incorrectly surely they will eat there words in the near future.

 

[White Room]

Bonding was a course undercoat but the receipe has changed and it feels like it's been mixed with browning, far to soft to tile to....

 

[CJ]

It's ok if you pva it first, then dot/dab with fix n grout. :smilewinkgrin:

 

[Ajax123]

I wonder if there is a surface tensile strength figure for bonding. Maybe then a gypsum based tile adhesive would work ok.... Not that I would advocate it...

 

[beanz]

I wonder if there is a surface tensile strength figure for bonding. Maybe then a gypsum based tile adhesive would work ok.... Not that I would advocate it...

Always worth looking at other avenues. It's strong enough to hold plasterboard up, although not as strong as plasterboard adhesive granted.

 

[Andy Tiler]

Always worth looking at other avenues. It's strong enough to hold plasterboard up, although not as strong as plasterboard adhesive granted.

Why would you put plasterboard on bonding?