Don't screw up your cement board installation - use these 25mm screws designed specially for use HardieBacker© products.
Self-countersinking, these durable screws are designed to cut a shaped hole in the fibre cement backerboard as they're screwed into place, meaning that the head finishes flush with the surface of the board once fully tightened.
Ruth N. 14/11/20
Susan B. 11/07/20
Karen B. 06/04/20
Roughly how many screws do you need per m2 ? Thanks
Our advice: Fasten a minimum of 12 screws into the board (4 rows of 3 screws). Keep fixings between 15mm from board edges and 50mm from board corners.