Swimming pool deck area

Composite vs Wooden Decking


The word “green” has become a buzzword, along with “small batch,” “eco-friendly,” and “locally sourced”. But, when one stops to think about it, what makes building materials or a construction project green?

In general, greener products have a less negative impact on the environment than products that are not considered green. In some cases, the effect on the environment can be positive. The EPA considers the entire lifecycle of a material when determining its sustainability and impact on the environment.

Generally, this lifespan goes from origin to disposal. Regarding decking material, this would mean looking at a material’s sustainability and eco-friendliness from manufacture to demolition and disposal. Below is a list of the greenest products available for constructing your deck.

Beautifully rendered wooden deck patio area outdoors in Cape Town

Natural Wood

If you want to use natural wood for your deck, you should consider the following environmental attributes:

  1. Sustainably Harvested

Was the wood sustainably harvested? Sustainable harvesting prioritizes practices that allow for a tract of land to regenerate its tree cover quickly and healthily.

  1. Locally Harvested

Was the wood locally harvested? Lumber that originates from far away may be cheaper to purchase at the lumberyard, but the environmental costs of transporting it are not often considered by the consumer. If the wood originated from overseas, then the carbon footprint of transporting the material will be much higher than if you requested local lumber.

  1. Treated Wood?

What was used to treat the wood? Depending on the performance requirements of the lumber you need, the wood may need to be treated with insect repellents or preventative sealants to protect from infestation and wood rot. The types of chemicals used will affect you and the surrounding ecosystem.

Composite deck surrounding pool

Composite Decks

Composite decking materials are a hybrid material made of a combination of plastics and wood fibre. They are more resilient to environmental stressors than traditional wooden decks. However, not all composite decks are made equally, especially as far as the environment is concerned.

  1. Next to Impossible to Recycle

Due to the nature of the composite material, separating the wood from the plastics is an impractical and costly feat that would ultimately be less energy efficient than throwing the refuse in a landfill.

  1. The Green Workaround

However, you can use composite decking materials that are considered green. If you choose a composite material that is made from mostly recycled materials – which many commercially available composites are – then your deck can be considered green.

PVC Decks

PVC decking is made entirely of plastic and is 100% recyclable. These types of decks are easier to maintain than wooden decks but are vulnerable to higher temperatures and are difficult to repair.

The Verdict

Choose 100% Wood or 100% Plastic

Composite materials are a great engineering feat and can be considered a green material if they were made of mostly recycled materials. However, since they cannot be recycled after manufacturing, it seems that going with all wood or all plastic is the greenest choice you can make.

Wood or Plastic, then?

Both can be environmentally friendly. The question boils down to what kind of maintenance are you looking to put into your deck. Wooden decks are much higher maintenance and require annual if not bi-annual attention and care. Whereas plastic or PVC decks don’t really require any annual maintenance and are very easy to clean.

We can assist you with both Wood and Composite Decks in Cape Town. View what we offer.