have never used any of the composite materials for anything

i came across some discards and i noticed that they are flaking
not sure how old they are but natural woods last a long time and i have
a good understanding of failure modes in wood but not at all with this
composite material

also this plastic is so much heavier than equivalent wood that i would
say that a structure like a deck would need a very much more sturdy
pilings and cross members to support the increased weight


but i wonder more how these composites are doing that are out there
anyone have any decks or etc made of these materials


how old and how are they holding up