The Big Conversation Right Now: “Not All Composite Decking Is the Same”
Published on 15th September, 2026.
There are so many different types of composite decking boards available today that it can be genuinely confusing for a first-time buyer.
And if you’re buying a product you know very little about, it’s easy to rely on what a salesperson tells you. Sales reps are there to sell their product, and they can be very convincing. Without knowing what you’re actually comparing, it’s easy to assume that all composite decking is basically the same.
It isn’t.
My aim here is to simplify things and give you a better understanding of the different types of composite decking available — and what your money is actually buying.
I also think the industry would benefit from clearer, more realistic standards for quality and performance. It would help consumers understand why one board may fade or scratch while another performs much better.
For example, some boards are hollow, some are scalloped, some are completely solid, and some have protective capped surfaces or heat-mitigating technology.
So let’s break it down.
🧱 1. Core Structure
Hollow Composite Boards
These boards have internal square or circular channels running through them.
The advantage is that they use less material, making them lighter and generally cheaper to manufacture, transport and handle.
They are commonly imported from China.
Scalloped Boards
These are essentially solid boards that have sections removed from the underside.
This reduces the amount of material used while retaining more strength than a traditional hollow board.
Solid Boards
These have a completely solid core.
They generally offer the highest level of strength, stability and heavy-load performance compared with hollow boards.
🛡️ 2. Capping Types
Another major difference is whether the board is capped or uncapped.
Uncapped Composite
The surface is essentially the exposed wood-plastic composite itself, often finished with a 3D-printed woodgrain pattern.
Because there is no separate protective outer shell, these boards generally have less resistance to UV fading, scratching and staining.
Capped Composite
A capped board has an additional polymer layer bonded around the board.
Think of it like a raincoat for the decking.
The protective layer is designed to improve resistance to:
- ☀️ UV fading
- 🖐️ Scratching
- 💧 Moisture
- 🥤 Staining
- 🌿 Everyday dirt and marks
🔄 Putting the Two Together
Once you understand the core and the surface, you can start to see why composite boards vary so much in price.
You can have:
Hollow + Uncapped
Generally one of the cheapest options.
These boards are lightweight and economical, but tend to have lower resistance to fading and scratching. They may also require closer support because of their lighter construction.
Solid + Uncapped
Much stronger than a hollow board, but the exposed surface can still be vulnerable to fading and scratching.
Hollow + Capped
A lighter alternative to a solid capped board.
The protective outer shell gives better resistance to UV, staining and scratching, but the hollow construction means it doesn’t offer the same strength as a solid board.
Scalloped + Capped
This is an interesting middle ground.
For example, Trex Basics and Naturals use a scalloped construction to reduce the amount of material in the board while retaining a protective capped surface.
That means you get many of the benefits of a capped board without paying for a completely solid core.
Solid + Capped
This is where you start getting into the premium end of composite decking.
A solid capped board is manufactured with a protective outer layer fused to the core, commonly through a process called co-extrusion.
The cap provides protection against moisture, staining, UV fading and scratching, while the solid core provides maximum strength and stability.
🔥 Premium Examples
There are several different levels within the premium market.
Trex Transcend
25-year warranty.
Trex Transcend Lineage
50-year warranty and heat-mitigating technology. Trex describes this as its coolest decking yet.
Trex Signature
50-year warranty with a photorealistic woodgrain finish and a more design-focused appearance.
TimberTech by AZEK – Landmark / Advanced PVC ranges
Premium capped decking options with long-term warranties.
🧪 PVC Decking
Then there is another category altogether: PVC decking.
For example, Elements from Composite Prime is a 100% synthetic material containing no wood fibres.
Because there are no wood fibres, PVC decking is completely resistant to wood rot.
It is also very lightweight compared with many wood-composite boards and offers excellent resistance to moisture and staining.
PVC can still get hot in direct sunlight, but it tends to release heat more quickly than traditional wood-composite decking, which can retain heat for longer.
Some PVC products are also marketed as being significantly cooler than traditional wood-composite decking under direct sunlight, depending on the product and conditions.
🪨 Mineral-Based Decking
Then we have something quite different again: Millboard.
Millboard is a wood-free mineral composite made using a polyurethane resin core, crushed mineral stone and glass-fibre reinforcement.
It has a flexible, rubber-like coating called Lastane, which is designed to provide resistance to slipping, staining and UV fading.
One of the things that makes Millboard different is the manufacturing process.
The boards are hand-moulded using real oak timber to reproduce the appearance and texture of natural wood.
So rather than trying to make plastic look like wood, the product is designed to capture the texture and character of real timber.
💷 So What Does Your Money Actually Buy?
This is where things get interesting.
There can be a huge difference in price between composite decking boards.
Here are some examples of products across different price brackets.
£20–£40 Per Board
Cladco Signature
2.4m — approximately £14.57 per board
Uncapped, hollow.
EnviroBuild Explorer
4m — approximately £29.99 per board
Uncapped, hollow.
Dino Decking
4m — approximately £24.99 per board
Uncapped.
Trex Enhanced Basics
3.6m — approximately £37.79 per board
Scalloped, capped.
Cladco Signature
4m — approximately £35.26 per board
Solid, uncapped.
£40–£60 Per Board
EnviroBuild Frontier
4m — approximately £41.99 per board
Solid, capped.
Trex Enhanced Naturals
3.6m — approximately £49 per board
Scalloped, capped.
Ecoscape Forms
4.8m — from approximately £53.21 per board
Hollow, capped.
£60–£80 Per Board
TimberTech Broadwalk
4.8m — approximately £68 per board
Scalloped, fully capped.
Trex Transcend
3.6m — approximately £66–£75 per board
Solid, capped.
£80+ Per Board
Millboard
3.6m × 176mm — approximately £104.64 per board.
Trex Signature
3.6m — approximately £131.77 per board.
Elements from Composite Prime
4.88m — approximately £107.70 per board.
Millboard Weathered Oak
3.6m × 200mm — approximately £117.20 per board.
🤔 So, What’s the Point?
A composite decking board can cost roughly £20 to well over £130 per length, depending on the brand, length, construction, materials, finish and technology used.
And that’s before we even start talking about installation, subframes, fixings, labour and the different warranties available.
So when someone says:
“Composite decking is composite decking.”
It really isn’t.
You can have a lightweight hollow board with an exposed surface, or you can have a heavy-duty solid board with a protective polymer cap, advanced heat technology and a 50-year warranty.
They may both be called “composite decking”, but they’re very different products.
And that’s the important thing for anyone buying a deck to understand:
Don’t just compare the price of the boards. Compare what you’re actually getting for your money.
That’s ultimately what I want to help people understand.