Hi GMDIY, yes we recommend that the decking must be pre-drilled and countersunk. If you are screwing composite to composite, pre-drill 90-100% of the screw depth with a 3.5mm diameter pilot hole. Drive the screw flush and do not overdrive. If cam-out occurs, remove and replace. Use two screws at every joist. Hope this helps. Thanks, Tite-Range team.
Answered by: Screw-Tite Product Expert
Date published: 2017-09-16