Plastic composite decking receives a great review from This Old House because it is made with recycled materials, including plastic milk jugs and shopping bags. The website gives it high praise for its ability to mimic the look of fresh-cut cedar and Brazilian walnut, without ever turning gray.
Another positive point This Old House gives plastic composite decking is that it requires far less maintenance than wood decking that needs to constantly be scrubbed, bleached and re-stained. Also, plastic composite decking does not splinter, rot or warp like actual lumber.
One negative aspect of plastic composite decking is that it comes in few colors and is prone to fading when the deck is in direct sunlight, notes Popular Mechanics. Customers can purchase decking that retains its color longer, but it is often more expensive.