Backer-On

Buying Guide: Cement Board Screws

Screw Length and Pack Size
Lengths of 1-1/4 in., 1-5/8 in. and 2-1/4 in. are offered, with pack counts such as 100 pk, 140 pk and 750 pk. Choose a length that gives enough thread into the stud after passing through the backer board and any mortar or adhesive layer. Match the length to your board thickness and framing.

Head and Drive Design
These screws have a serrated flat head that countersinks for a flush seat at any angle, leaving a smooth surface for tile. The star drive recess uses a T-25 bit, and these screws feature Stikfit for one-handed installation.

Frequently Asked Questions

What does Backer-On make?
Backer-On offers cement board screws in the Rock-On line, used for attaching fiber cement backer board to wood or light gauge steel studs.

How do I choose the right size?
Measure your backer board and framing before ordering. Pick a length that reaches well into the stud, and match the size on your old part if you are replacing screws.

What drive bit do these screws use?
The star drive recess takes a T-25 bit, so keep a matching bit on hand before you start.