PVC Deck Problems

Cost

• PVC decking costs more than other decking, because manufacturers have to use virgin materials instead of recycled products, like some composite decking contains. PVC decking cost between $7 and $12 per square foot in 2010, compared to $3 per square foot for plastic wood composite and $5 per square foot for redwood or cedar decking.

Aesthetics

• PVC decking doesn’t contain wood fibers like wood plastic composites (WPC) do, so it looks and feels like plastic instead of wood. Some people don’t like this feature. In addition, PVC decking reflects sunlight, and it can be very glossy. Some manufacturers add flax fibers to help cut down on sheen. PVC decking is only available in a limited number of colors, including white, tan or gray. Although these colors tend to harmonize well with most homes, some people prefer more choice.

Strength

• PVC decking isn’t as strong as wood decking, so the deck may feel spongy when you walk on it and, over time, it will sag. You can space the floor joists closer together if you want a stiffer surface, but it’ll cost extra. PVC can be used for flooring and railings, but it’s not strong enough to provide structural support. Some manufacturers provide wooden posts with vinyl wrappers for a consistent look. PVC can also be damaged and broken by thrown rocks and hail.

Environment

• PVC decking isn’t friendly to the environment. It’s made from chlorine and ethylene that’s derived from oil and gas. It also contains chemicals like phthalates, which are added to make it flexible. An extremely toxic compound called dioxin is produced and released when PVC is manufactured. In addition, PVC is hard to recycle, and usually ends up in landfills.

Other

• PVC decking retains heat and shouldn’t be used in hot climates where decks are exposed to a lot of sun. Although it has a good fire rating, it produces toxic gases when it does burn. Deck boards are scratch-resistant, but post covers, railings and balusters scratch easily.