We advise against burying a screwing plastic lumber directly because stainless steel screws are relatively soft for the extremely dense plastic. Driving a screw straight in without a pilot hole could cause the screw to strip, snap or bind too tightly, making it difficult to remove later down the line. A simple pilot hole removes this risk, making installation far easier.
How To Properly Size A Pilot Hole
When you drill plastic lumber, the pilot hole should match the diameter of the screw shank – not the thread. This ensures the screw goes in smoothly without excessive force and provides a clean and consistent result every time.
You can find out more detailed information on cutting, drilling and screwing plastic lumber in our British Recycled Plastic guide.
