Cement board adhesive

[Zehroni]

I am trying to install cement board in my newly built bathroom. these board are 1200x800 and 12.5mm in thickness. they are very heavy, thus, normal plaster board adhesive will not hold them in place,
what sort of Cement board adhesive I can use to stick on the thermolite wall. I amanged to screw them on the stud wall

 

[^woody^]

normal plaster board adhesive will not hold them in plac

Why not?

 

[mikeey84]

Do you not use cement based tile adhesive?

That's what I was told to use by the manufacturer of the ones I used

 

[Zehroni]

Why not?

because they are heaver then normal plaster board, that is what I was told by the plasterer who is doing the work

 

[^woody^]

because they are heaver then normal plaster board, that is what I was told by the plasterer who is doing the work

Then why doesn't the plasterer know what to use?

Tip. These boards will need to be mechanically fixed in addition to any adhesive

 

[noseall]

because they are heaver then normal plaster board, that is what I was told by the plasterer who is doing the work

It's nowt to do with the weight rather the cohesion is pants.
We dab our cement boards using dry wall adhesive then mechanically fix once the adhesive has set. Don't faff about with them until they have been mechanically fixed or else they may pop off their dabs.

 

[Zehroni]

It's nowt to do with the weight rather the cohesion is pants.
We dab our cement boards using dry wall adhesive then mechanically fix once the adhesive has set. Don't faff about with them until they have been mechanically fixed or else they may pop off their dabs.

what sort of screws did you used and what size?

 

[noseall]

what sort of screws did you used and what size?

70mm 5's with brown plugs.