Who this guide is for
- Homeowners comparing two synthetic decking options
- People weighing a wood-like look against an all-plastic board
- Anyone in a hot or wet climate thinking about heat and moisture
- Planners considering board weight and feel underfoot
Composite at a glance
Composite decking blends wood fibres with plastic, which often gives it a look and feel closer to timber, with realistic grain and a substantial board. Because it contains wood, it can read warmer and more natural than pure plastic while still avoiding much of timber's upkeep.
The trade-offs are around heat and moisture. The wood content means composite can be heavier and, depending on colour and product, can absorb more heat in strong sun, and the fibres make it somewhat more moisture-aware than all-plastic board. It is low-maintenance but not entirely indifferent to the elements.
- Wood-plastic blend, often timber-like look
- Can feel warm and natural
- Substantial board feel
- Wood content brings some heat and moisture awareness
PVC at a glance
PVC decking is all plastic with no wood content, which makes it light, highly moisture-resistant and very stable around water. With no fibres to absorb moisture, it suits wet or poolside settings and tends to be among the most weather-indifferent synthetic boards.
The trade-offs are look and feel. Without wood content, PVC can read more plastic and less natural than composite, and like any board it can get warm in strong sun depending on colour. It is highly durable and easy to keep clean but with a different aesthetic character.
- All-plastic, no wood content
- Light and highly moisture-resistant
- Stable around water and poolside
- Can read more plastic, less natural
How they compare
On look, composite's wood content often reads more like timber, while PVC can look more plastic. On moisture, PVC's all-plastic make-up makes it especially water-indifferent, while composite is moisture-aware but still low-maintenance.
On weight, PVC tends to be lighter, while composite is more substantial. Both can warm in strong sun depending on colour. Upkeep is low for both. Neither is better overall; the right board depends on your climate, the look you want and the deck's setting.
How to choose for your situation
Start with setting and moisture. If the deck is poolside, very wet or you prioritise maximum moisture resistance and light weight, PVC's all-plastic nature fits. If a natural, timber-like look matters most and conditions are typical, composite often appeals.
Then weigh look, weight and heat together. Consider how natural you want the board to read, how colour affects heat in your sun, and the feel underfoot. Because deck structure is involved, route framing to a qualified professional and confirm product details for your project.
Composite vs PVC decking checklist
- 1Consider how wet or poolside the deck setting is
- 2Weigh a timber-like look against an all-plastic board
- 3Think about board weight and feel underfoot
- 4Consider how colour affects heat in your sun exposure
- 5Plan for low but not zero upkeep on either board
- 6Match the board look to the house and garden
- 7Route deck framing and structure to a professional
- 8Confirm product details for your project
Common mistakes to avoid
- Assuming all synthetic decking looks and feels the same
- Overlooking heat gain from dark board colours in strong sun
- Choosing on look alone in a very wet or poolside setting
- Forgetting deck structure still needs professional attention
- Expecting zero maintenance from any decking board
When to involve a professional
- A deck builder can advise which synthetic board suits your setting and structure.
- Deck framing, support and elevation are matters for a professional.
- Heat and moisture behaviour vary by product, so confirm specifics.
- Details vary by project, so verify what applies for your deck.
Frequently asked questions
Questions readers ask about this topic
What is the difference between composite and PVC decking?
Composite blends wood fibres with plastic, often giving a more timber-like look, while PVC is all plastic with no wood content, making it lighter and especially moisture-resistant. The core difference is wood content and how it affects look, weight and moisture behaviour.
Which is better around water or a pool?
PVC's all-plastic make-up makes it especially water-indifferent and stable around moisture, which suits poolside and very wet settings. Composite is still low-maintenance but is more moisture-aware due to its wood content.
Do both get hot in the sun?
Both can warm in strong sun, and heat gain depends largely on board colour, with darker boards absorbing more. Neither is immune, so consider colour and your sun exposure when choosing.
Which looks more like real wood?
Composite's wood content often gives it a more natural, timber-like look and feel, while PVC can read more plastic. Look is a matter of taste and product, so comparing samples helps you judge for your deck.
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