Co-Extruding Makes A Good Decking Product Great.



Azek pioneered co-extrusion and is the leader in modern synthetic decking.  Azek uses a cellular PVC core under it’s proprietary polymer outer layer. The Azek polymer is the second hardest and thickest capstock we have tested and the only brand that allows pressure washing for maintenance. Azek has enjoyed a excellent track record in the field and is the most reliable board you can install. Strengths of Azek decking include: ease of installation, low maintenance, cool to the touch on hot days, light weight. Azek is also dimensionally stable eliminating the need for gapping at the butt joints and reducing fastener fatigue.



Trex is the perennial category leader with a 51% market share. Trex has adapted their traditional composite core to be co-extruded with a polymer wrap for durability. Trex also has a line of cellular PVC decking. Trex’s composite core is made up of recycled wood and plastic components. The density of  the traditional composite core adds impact resistance and strength but increases heat load on hot days. The Trex color palette contains impressively authentic wood appearances and more modern looking budget choices. The new Trex Select board is price competitive with all but, the cheapest cedar.



TimberTech is the second largest manufacturer of synthetic based decking. While still technically a green product TimberTech uses only virgin plastic in it’s composite mix. This affords tighter control over the manufacturing process. Timbertech also has a line of cellular PVC decking but, focuses on the traditional core co-extruded boards. TimberTech has some very attractive colors  in their line-up, in fact we believe their price point board has the highest aesthetic value in it’s class. The TimberTech polymer coating is the least durable of the major manufacturers and should be a consideration in high wear applications.



Not well known on the west coast until recently Fiberon has been a leading brand back east for some time. Fiberon’s line up contains a few of the most authentic looking boards that are on the market. In our testing the polymer layer on fiberon decking was the hardest albeit thinest co-extrusion we observed. Fiberon also has the most dense structure of the major manufacturers and thus is very stiff and “board like”. We expect Fiberon to continue to make gains in the market in the near future.

If you would like more information on decking checkout our decking articles.

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