Advantages

Alternative decking materials are becoming more popular due to the fact they are durable and last longer, with little to no maintenance, and most are made from recycled materials. Common types include wood/plastic composite lumber and plastic lumber. 90-100% of alternative decking is made up of recycled materials that do not require the use of paints or sealers and are not prone to cracking or splitting like wood. 

Savings

The initial investment in alternative decking materials is often more expensive than traditional wood, but the paybacks are received alot less maintenance and an increased lifespan. These materials quickly pay for themselves in only a few short years, with savings on maintenance in the thousands over the deck's lifetime.

Issues

The issues that might arise with these materials are stains, molds, mildew. Stains are a leading drawback because they are made from oak fibers that have higher tannic acid content. Molds and mildew are also common to composite these type of materials, but also can be avoided by proper spacing between deck boards, allowing for drainage. Many manufacturers suggest periodic cleanings with deck cleanser to prevent buildup. Composite decking is weaker than wood. Avoid sagging or drooping by building the deck according to the manufacturer's specifications.

More Information On This Topic

NADRA-North American Deck and Railing Association

Deck Information, Products and Service Providers