Hardibacker Board

[Ajax123]

i am in the process of screwing down hardibacker onto my existing levelled concrete floor to stabilise the levelling compound which delaminated in some areas.

question. where the boards meet there is a joint. Do I need to grout this joint at all before tiling and I think i am right in thinking the boards don't need to be primed.

 

[DHTiling]

Hi Al.. Use an alkaline resistant joint scrim and no priming required.. wipe dust off from drilling with a sponge..

 

[Ajax123]

Hi Al.. Use an alkaline resistant joint scrim and no priming required.. wipe dust off from drilling with a sponge..

Something like Plasterboard scrim then yes??

 

[DHTiling]

Ye.. but needs to be alkaline resistant to stop the adhesive from rotting it.. wickes etc sell the hardi scrim tape.