Answer
How do I stop decking being slippery?
Non-slip composite or grooved boards, good drainage and cleaning; algae is the usual cause.
In short
Slippery decking is usually algae on damp, shaded timber. Non-slip composite boards, grooved profiles or anti-slip inserts, good drainage and keeping it clean all help. Near water or in shade we specify a non-slip board from the start rather than fixing it afterwards.
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