Using Cortex Fasteners To Flush Board Seams

By Robert Robillard

Technique for keeping seams flush: By Ethan Bickford A few years ago fastener manufacturers started making screws with reverse threads near the head of the screw to prevent “mushrooming” in composite and plastic building materials like decking and PVC trim. I’ve used the The Cortex Concealed Fastening System many times before and have found that…

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