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Rock-On^® Cement Board Screws (DISCONTINUED)

Designed for attaching fiberglass reinforced cement board such as Durock®* and WonderBoard®* to wood or light gauge steel framing.

Flush seating in all cement board when angle driven
Ability to attach close to edge in all cement boards without fractures or blowouts
Stikfit™ recess for one-handed driving, while eliminating cam-outs and wobbling
Premium corrosion-resistant finish to prevent rust from bleeding into grout

Product Information
Related Products
FAQ'S

Product Information

MAIN APPLICATIONS

BATHROOM

KITCHEN

FLOORING

Product Documentation

How to Install

*Durock - Registered trademark owned by USG, not affiliated with ITW

*WonderBoard – Registered trademark owned by Custom Building Products, not affiliated with ITW

Related Products

FAQ’s

Can Backer-On Rock-On screws go through steel studs?

Yes, Backer-On Rock-On screws can be used in 26 to 22 light gauge steel.

Are Backer-On Rock-On screws approved for use in treated lumber?

No, Backer-On Rock-On screws are not approved for use in treated lumber.

Can Backer-On Rock-On be used in Fiber Rock Board?

No, the application requires a buglehead type S-12 screw. Rock-on screws will not seat properly in Fiber Rock.

Are Backer-On Rock-On Screw ACQ approved?

No, Backer-On Rock-On screws are not approved for ACQ.

How many screws do I need to put into a sheet of cement board?

We recommend referring to the cement board manufacturers guidelines for screw pattern.
In floor applications, screws should be placed every 8"". You will use approximately 55 screws per 3' x 5' cement board and 91 screws per 4' x 8' cement board.
In ceiling applications, screws should be placed every 6"". You will use approximately 55 screws per 3' x 5' cement board and 150 screws per 4' x 8' cement board.
In wall applications, screws should be placed every 8"" when connecting to the wall studs. This will amount to roughly 25 screws per 3' x 5' cement board.

Can Backer-On Rock-On screws be used on Hardiplank?

No, Backer-On Rock-On screws are not approved for exterior applications.

What is the Climaseal coating made of?

Epoxy based polymer coating over electro-zinc plating.

Can Backer-On be substituted for Rock-On and vise versa?

Yes, they can be substituted, but will not achieve optimal performance. For optimal performance, it is recommended to use the screw with corresponding board material.
Rock-On screws are designed for fiber-glass cement boards.
Backer-On screws are designed for fiber cement boards.

Can Backer-On Rock-On be used in 3/16 steel?

No, Backer-On Rock-On screws can be used in 26 to 22 light gauge steel.