I was asked this question yesterday, and thought I would share the answer with you all !
Solid or Hollow Composite Decking! What is the difference and which is best for me. See the FAQ section about this below
Solid vs Hollow Composite Decking: What’s the Difference & Which Is Best for You?
Composite decking has become one of the most popular choices for UK gardens thanks to its durability, low maintenance, and modern finish. But when choosing your boards, one of the biggest decisions is solid vs hollow composite decking.
So what’s the difference, and which option is right for your garden?
What is Composite Decking?
Composite decking is made from a mix of wood fibres and recycled plastic, designed to mimic the look of timber while offering far greater durability and weather resistance.
There are two main types:
- Solid composite decking
- Hollow composite decking
Both look similar on the surface, but their internal structure makes a big difference.
What is Solid Composite Decking?
Solid composite decking boards are exactly what they sound like—completely filled material with no internal voids.
Key features:
- Heavier and more robust
- Stronger under load
- Better resistance to impact
- Often more premium in appearance
- Can feel more like real timber underfoot
Benefits:
- Ideal for high-traffic areas
- Better for commercial spaces or family gardens
- Less prone to flexing or movement
- Easier to cut and finish edges cleanly
Drawbacks:
- Heavier to install
- Usually more expensive
- Requires a stronger subframe due to weight
What is Hollow Composite Decking?
Hollow composite decking boards have internal channels or voids running through them, reducing weight and material use.
Key features:
- Lighter than solid boards
- Easier to transport and install
- Usually more cost-effective
- Still durable with proper installation
Benefits:
- Great for DIY installations
- More budget-friendly option
- Less strain on subframe structures
- Works well in standard domestic gardens
Drawbacks:
- Slightly less impact resistance
- Can feel less solid underfoot
- Edge finishing may require end caps or trims
- Not always ideal for heavy furniture or hot tub areas
Solid vs Hollow Composite Decking: Quick Comparison
| Feature | Solid Decking | Hollow Decking |
|---|---|---|
| Strength | Very high | Moderate to high |
| Weight | Heavy | Lightweight |
| Cost | Higher | Lower |
| Installation | Harder | Easier |
| Appearance | Premium | Clean but slightly less dense feel |
| Best use | Heavy-use areas | Domestic gardens & DIY projects |
Which Is Best for Me?
Choosing between solid and hollow composite decking depends on how you plan to use your outdoor space.
Choose Solid Composite Decking if:
- You want maximum durability
- You’re installing a hot tub or heavy furniture
- Your deck will get heavy daily use
- You prefer a more premium, solid feel
Choose Hollow Composite Decking if:
- You’re working to a tighter budget
- You want easier installation
- It’s a standard garden seating area
- You prefer a lighter structure
Expert Tip from Sussex Decking
Most homeowners don’t need “over-engineered” decking—but equally, going too light for a high-use space can shorten lifespan.
The best choice is always based on:
- Your garden layout
- Expected foot traffic
- Subframe strength
- Budget vs longevity balance
If you’re unsure, a professional assessment can save you money long-term.
Conclusion
Both solid and hollow composite decking are excellent choices when installed correctly. Solid boards offer maximum strength and a premium finish, while hollow boards provide affordability and easier installation.
The right choice comes down to how you’ll use your space—and how long you want it to last.
For tailored advice, Sussex Decking can help you choose the perfect solution for your garden.
📍 Decking Installation Across Sussex
At Sussex Decking, we design and install high-quality timber and composite decking across Sussex and surrounding areas.
We regularly work in:
- Brighton
- Crawley
- Horsham
- Worthing
- Eastbourne
- Haywards Heath
- Lewes
- Burgess Hill
- Hove
- Saltdean
- Shoreham
- Peacehaven
- Patcham
- Hangleton
- Brighton Marina
- Rottingdean
- Gatwick
- Reigate
- East Grinstead
- Preston Park
Whether you’re searching for “decking near me” or a trusted local installer, our team provides expert design, supply, and installation services tailored to your garden.
FAQ – Solid vs Hollow Composite Decking
1. What is the main difference between solid and hollow composite decking?
Solid composite decking is fully filled, making it stronger, heavier, and more durable. Hollow composite decking has internal channels that reduce weight and cost while still offering good performance for most domestic garden projects.
2. Is solid composite decking better than hollow?
Solid composite decking is better for high-traffic areas, heavy furniture, or hot tubs because it offers greater strength and stability. Hollow composite decking is still a good option for standard gardens where weight and budget are more important.
3. Does hollow composite decking last as long as solid decking?
Both solid and hollow composite decking can last many years when properly installed. However, solid decking typically offers better long-term resistance to heavy loads, impact, and wear over time.
4. Which is cheaper: solid or hollow composite decking?
Hollow composite decking is usually cheaper because it uses less material and is lighter to manufacture and transport. Solid composite decking costs more but provides increased strength and a more premium feel.
5. Which composite decking is best for my garden?
It depends on your needs. Choose solid composite decking for maximum durability and heavy-use areas. Choose hollow composite decking if you want a more affordable, lightweight option for a standard residential garden.
