Load Bearing Myths: The Real Strength of Composite Decking for South African Homes
Outdoor living is at the heart of the South African lifestyle. From weekend braais with friends to relaxing evenings on the patio, a deck often forms the centrepiece of the home. But many homeowners still have one big concern: is composite decking strong enough?
In this blog, we uncover the truth about load bearing, explain why galvanised steel substructures are the smart choice inland, and show why Fisher’s Decking & Flooring are the trusted expert when it comes to composite deck installation.
What Is Composite Decking?
Composite decking is made from a blend of recycled wood fibres and high-performance polymers. With composite planks that mimic real timber or grooved planks for a modern, sleek finish, the boards combine style with durability. They resist warping, cracking, and show only minimal fading over time. Available in a wide range of colours and finishes, composite decking has become a preferred option for South African homes thanks to its strength, low maintenance, and long-term guarantees.
Composite Decking vs Timber Decking: The Real Difference
The strength of any deck comes from the substructure. This is where the real difference between timber and composite installations shows.
| Feature | Timber Decking | Composite Decking with Steel Structure |
|---|---|---|
| Substructure | Often timber, prone to rot and termites | Galvanised steel, engineered for strength |
| Load Bearing | Weakens over time with weathering | Consistent, engineered support |
| Maintenance | Requires sanding, sealing, and treatment | Virtually maintenance-free |
| Durability | 5–10 years with regular upkeep | 15–25 years with no upkeep |
| Safety | Can splinter, warp, or loosen | Slip-resistant, splinter-free surface |
| Investment Value | High maintenance costs long term | Longer lifespan, better return on investment |
Why Load Bearing Myths Need to Be Busted
1. Myth: Composite decking is too light to carry weight
Composite boards are not designed to carry heavy loads on their own. The true load bearing comes from the galvanised steel frame beneath. Once installed correctly, the deck easily carries heavy furniture, braai setups, and even large groups of people.
2. Myth: Composite boards warp under pressure
High-quality boards supplied and installed by Fisher’s resist warping, show only minimal fading, and do not crack. The galvanised steel substructure ensures that even in inland climates with heat and rain extremes, your deck remains stable.
3. Myth: Timber frames are cheaper and just as good
Timber frames may seem affordable but are vulnerable to moisture, termites, and rot. Over time, they fail, costing homeowners more in repairs. Inland, Fisher’s use galvanised steel exclusively because it delivers far better performance.
Why Structure Matters as Much as the Surface
A deck is only as strong as what lies beneath it. Composite boards create the beautiful finish, but the galvanised steel frame is what does the heavy lifting. Steel does not rot, swell, or attract pests. It provides reliable support across all seasons and ensures your deck lasts decades instead of just a few years.
Why Choose Fisher’s for Your Composite Deck
Fisher’s are not only suppliers, they are installation specialists with over 18 years of experience across South Africa and Africa. Choosing them means:
● Galvanised steel substructures designed for inland climates
● Over engineered foundations for lasting strength
● Longer composite planks (up to 5 800 mm) for fewer joins and cleaner finishes
● All clips and screws included in every quote - no hidden extras
● Transparent warranties ranging from 10 to 25 years
● A showroom in Bryanston where you can view full scale installations
With Fisher’s, your deck is handled from planning through to expert installation. Homeowners avoid the risks of failed DIY jobs or poor contractors, and enjoy peace of mind knowing every detail is taken care of.
Key Benefits of Composite Decking Installed by Fisher’s
1. Long Lasting
A galvanised steel substructure is resistant to rust, rot, termites, and warping, while composite boards are built to last for decades.
2. Low Maintenance
No sanding, sealing, or staining needed, just an occasional wash.
3. Eco Friendly
Boards are made from recycled content, contributing to sustainable building.
4. Safe and Stylish
Slip resistant, splinter free surfaces that remain comfortable underfoot.
5. Strong Guarantees
Composite products are backed by guarantees of 10, 15, or 25 years.
Is Composite Decking Worth It?
Absolutely. Composite decking in Africa offers:
● A longer lifespan than timber
● Greater structural reliability with galvanised steel
● Stylish finishes with fewer joins
● Virtually no maintenance
● Resistance to heat, UV, and rain
● Improved property value
If you want a deck that stays strong, looks modern, and requires almost no upkeep, composite decking with a galvanised steel substructure is the clear winner.
View Our Pool Deck Gallery for Inspiration
From modern rooftops in Sandton to garden decks in Stellenbosch, our composite decking is transforming outdoor living. Visit our gallery to explore real installations and find inspiration for your own project.
Request a Quote or Get in Touch
Ready to upgrade your pool area with a slip-resistant composite deck? Fisher’s Decking & Flooring are here to help.
✔ Request a personalised quote below
✔ Visit our showroom in Bryanston
✔ Explore our before-and-after gallery for ideas
✔ Download our installation guides
✔ Learn more about composite decking in South Africa
Call us at 083 444 0655 or email gary@fishersdecking.co.za to get started.