Hardiebacker screws

[JT101]

I have some Reisser woodcutter screws for fixing my hardiebacker boards to the stud wall. They are passivated. They will be tiled over with watewrproof tile adhesive.

Should I be using stainless screws or will these be ok?

And what are the hardiebacker screws coated with?

Thanks

 

[Alec22]

Use stainless steel screws, pilot the board before and scrape of the back where it breaks out. You can countersink the board if there difficult to screw is flush.