Table of Contents
- Why Decking Heat Matters
- How We Ran Our Decking Heat Test
- Decking Heat Test Results
- Trex Lineage Heat Performance
- Trex vs Timber: Surface Temperature Comparison
- Other Composite Decking Results
- Trex Transcend Heat Results
- What This Means When Choosing Decking
- Tips to Reduce Deck Heat
- Why Many Homeowners Choose Trex
- See Trex Decking in Person
One of the most common questions we hear from homeowners considering composite decking is:
“Does Trex decking get hotter than timber?”
It’s a fair question, especially here in South Australia where outdoor areas experience strong sun, high UV levels and hot summer temperatures.
Rather than relying on assumptions or marketing claims, we decided to run our own real‑world decking heat test comparing Trex, timber and other composite decking boards under the same conditions.
The results were very interesting.
Why Decking Heat Matters
When people ask if composite decking gets hot, they’re usually referring to how the surface feels underfoot in direct sunlight.
The reality is that any outdoor surface, whether it’s timber, composite decking, concrete or pavers will absorb heat when exposed to the sun.
Several factors influence how hot decking becomes:
- Board colour
- Material density
- Sun exposure
- Air flow around the boards
Understanding these factors helps homeowners make better decisions when planning an outdoor area.
How We Ran Our Decking Heat Test
To get a fair comparison, we tested a range of timber, aluminium and composite decking boards side‑by‑side.
Each board was:
- Placed in direct sunlight
- Tested at the same time
- Measured using a surface temperature reader
- Compared under identical conditions
This allowed us to see how different decking materials actually perform in real outdoor conditions rather than relying on theory.
Decking Heat Test Results
The test produced a clear ranking of surface temperatures across different decking materials.
Some of the coolest boards recorded were:
- DecoDeck Aluminium – 52°C (Ranked 1st & 2nd)
- Jarrah – 54°C (Ranked 3rd)
These results show that material type and construction play a major role in how decking performs under direct sunlight.
Trex Lineage Heat Performance
One of the most interesting outcomes was the performance of Trex Lineage.
This range uses advanced heat‑mitigating technology designed to reflect more sunlight and reduce heat build‑up compared with traditional composite decking.
Trex Lineage recorded the following temperatures:
- Trex Lineage Carmel – 56°C (Ranked 4th)
- Trex Lineage Biscayne – 59°C (Ranked 5th)
- Trex Lineage Jasper – 59°C (Ranked 6th)
- Trex Lineage Rainier – 59°C (Ranked 7th)
These results placed Trex Lineage right alongside popular hardwood timbers.
Trex vs Timber: Surface Temperature Comparison
Several commonly used hardwood decking species recorded similar or higher temperatures:
- White Mahogany – 59°C
- Spotted Gum – 60°C
- Red Ironbark – 62°C
This means that in real‑world conditions some Trex boards were actually cooler than widely used hardwood decking options.
For homeowners comparing Trex vs timber heat performance, the results show that Trex performs very competitively under direct sun.
Other Composite Decking Results
We also tested several other composite decking brands. Many recorded significantly higher temperatures:
- Eva‑Last Infinity – 72°C
- EkoDeck Essentials – 69°C
- EkoDeck Designer – 65°C
These results highlight an important point:
Not all composite decking performs the same. Board technology and construction have a big impact on heat performance.
Trex Transcend Heat Results
Boards from the Trex Transcend range delivered temperatures comparable to many hardwood timbers:
- Rope Swing – 62°C
- Tiki Torch – 63°C
- Gravel Path – 64°C
- Island Mist – 65°C
- Havana Gold – 66°C
Again, these results show that Trex decking performs similarly to many traditional timber decking species when exposed to direct sunlight.
What This Means When Choosing Decking
The key takeaways from our decking heat test are:
- All decking materials get warm in direct sun
- Trex performs similarly to hardwood timber underfoot
- Trex Lineage can be cooler than some hardwood decking species
- Not all composite decking products perform the same
In many cases, colour choice and shade structures have an even greater impact on surface temperature than the material itself.
Tips to Reduce Deck Heat
If heat underfoot is a concern, there are several ways to reduce surface temperatures:
- Choose lighter coloured decking boards
- Install pergolas or roofed outdoor areas
- Use umbrellas or shade sails
- Incorporate trees or landscaping for natural shade
These strategies work for both timber and composite decking.
Why Many Homeowners Choose Trex
While heat performance is important, Trex also offers several advantages over traditional timber decking.
Trex decking:
- Requires no sanding or oiling
- Won’t splinter or crack
- Resists fading and staining
- Comes with long‑term manufacturer warranties
This allows homeowners to enjoy their outdoor areas without the ongoing maintenance required with timber.
See Trex Decking in Person
If you’re considering Trex decking for your outdoor area, the best way to understand the difference is to see it in person.
You can view a range of Trex decking at the Adelaide Outdoor Kitchens showroom:
1–2 / 12 Farrow Circuit
Seaford SA 5169
If you’d like help planning your outdoor area, feel free to get in touch with the Mid Coast Pergolas & Decks team.
