Just bought a house with a pool. The pool decking is comprised of large, square concrete pads that are separated by wood furring strips. The prior owner has used pressure-treated 1x2s atop a small gravel bed for drainage. I'm looking for an alternative to the wood that won't bow and will retain its aesthetic qualities for a long time. Options I've considered are things like Trex, Extira, decorative gravel. Someone told me about a soft, permeable material that holds its shape to provide the nice, clean edge, but helps drainage, but I can't remember what it was.
Any ideas on what materials I can consider? Many thanks in advance.