Fencing & Decking

What wood is used to make the decking?

Researchers have found that, just as some lumber is less susceptible to mold and insect infestations, composites made with sawdust from certain trees are more resistant to decay. For instance, as Washington State University and the University of Tennesee’s Wood Plastic Composites: A Primer explains, composite decking made with eastern red cedar and cherry are “more resistant to water absorption, swelling, and rot.”

What kind of plastic is used?

PVC is the strongest of the three types of plastic used in composite decking. Virgin PVC is typically stronger than recycled plastic. Boards containing polyethylene can span only 16 inches between supports, while those made with polypropylene or PVC can span 24 inches. On the flip side, polypropylene and PVC are more susceptible to weathering and surface oxidation.

Which quality standards does this composite meet?

There are voluntary quality standards composite decking manufacturers can choose to meet. Ask your contractor to explain which, if any, are met and what that means to you.

What kind of warranty does this product carry?

Can you guarantee installation labor? Most manufacturers offer 10- to 20-year warranties on composite decking materials. A few offer lifetime warranties. Be sure you read all the fine print for the warranty—it’s not a fun task, but it will save you money and hassle down the road. Also, if you are having an outside contractor erect the deck, make sure you ask if the labor is under warranty.