Tile Boards to Masonry wall

[John2502]

Hi all.
Am currently replacing bathroom wall tiles. Walls are a mixture of stud and masony. Taking off the old tiles resulted in replacing the old plasterboard with STS tile boards. All done. Coming to masony wall behing the toilet, a little of the plaster has come away from this wall. It says the boards can be fixed to block/masonry and seems to suggest with tile adhesive. Would this be sufficient to hold tile backer boards. Have seen people do this to fix to concrete floors but not walls. Hardie boards seem to have fixings for this but STS dont (they are different i know)
Thanks
John

 

[Jon_Hall]

You wont be able to fix the boards with just tile adhesive, as plaster can only take 20kg per metre, so by the time you have tiled the board as well, you will be well over the maximum weight. I would patch the wall up then mechanically fix the boards with plenty of plugs and screws. Or alternatively use one of the other types of board with their mechanical fixings.

 

[bradders]

As Jon says...
Fixings every 50mm or so...
View: https://www.youtube.com/watch?v=6QoCL-EaSQQ

 

[John2502]

Thanks both, I used the same tile boards and used flexible tile adhesive along with plugs and screws (with their special washers as per the picture which avoid the screw pulling through the boards) once dried. Boards seem very solid on the walls. definitely just the tile adhesive wouldn't have been enough in my opinion. thanks again.

 

[Mattpree]

Do you need to sbr the brick before fitting the boards?

 

[Jon_Hall]

Yes, directly on to blockwork or render, 1:4, if its plaster prime it neat.