What is Duofuse wood composite?

Duofuse is a high‑quality wood composite made from a mix of wood flour and PVC. This combination provides the natural appearance of wood together with the durability and stability of PVC.
It is manufactured in Belgium from raw materials to finished product.

What are the main advantages of Duofuse?

Duofuse products offer several advantages, including:

• Low maintenance: no more oiling or painting
• Rot‑free, splinter‑free and mould‑resistant
• Brushed anti‑slip surface, ideal around swimming pools
• Colour stability: slight colour variation in the first weeks, then fully stabilised
• Ecological and recyclable: produced in Belgium using PEFC‑certified wood

Which products does Duofuse offer?

The range includes:

• Decking boards (hollow and solid)
• Garden fencing / screens
• Garden gates

Available in colours such as Graphite Black, Stone Grey, Wenge Brown and Tropical Brown — and even in photorealistic wood‑grain prints.

How do I maintain Duofuse products?

Duofuse is very easy to maintain. In most cases, the following is sufficient:

• Clean with water and mild soap
• Avoid aggressive chemical solvents
• High‑pressure cleaning allowed up to max. 80 bar

Do Duofuse panels or decking boards discolour?

Yes, slight initial discolouration may occur due to the natural leaching of lignin (a natural wood component).
This stabilises after a few weeks, after which the colour remains consistent for decades.

Are Duofuse boards suitable for all weather conditions?

Yes. Thanks to the combination of wood flour and PVC, the boards are:

• UV‑resistant
• Moisture‑resistant
• Resistant to rain, snow and temperature fluctuations
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What is the difference between hollow and solid decking boards?

The quality of wood composite (WPC) depends heavily on its formulation.
Because of the type and quality of PVC used in Duofuse®, a high‑quality hollow decking board can be produced.
Solid Duofuse® decking boards offer even better technical performance, including higher fire‑reaction ratings.

Hollow decking boards

• Lightweight
• Ideal for balconies and roof terraces
• Perfectly compatible with the Duofuse aluminium substructure
• Approx. 18 kg/m², among the lightest boards on the market

Solid decking boards

• Higher impact resistance
• Better fire‑reaction class

How are Duofuse decking boards installed?

Duofuse decking boards are installed with invisible fixings:

• On PVC or wooden joists using stainless steel Duofuse clips
• Or with the faster Duofuse aluminium substructure, which saves up to 50% installation time

Is Duofuse easy to install?

Yes. Duofuse is very easy to install — follow the installation guidelines for each product type.

If needed, contact your distributor or Duofuse directly.

Which colours are Duofuse products available in?

Standard composite colours:

For Duofuse decking boards type DFD162, DFDE162, DFDS162, DFDE140, these are the colors.

• Graphite Black (GB)
• Stone Grey (SG)
• Wenge Brown (WB)
• Tropical Brown (TB)

Photorealistic wood‑grain colours (DF6 fencing):

• Barnwood Grey
• Woodland Oak
• African Padauk
• Grey Cedar

Photorealistic wood‑grain colours (DFDF162 decking):

• Silver Teak
• Reclaimed Oak
• Amber Oak
• Sienna Oak
• Midnight Oak

How long does Duofuse wood composite last?

Duofuse has a long lifespan when installed correctly due to:

• The combination of wood flour and PVC
• High dimensional stability
• Excellent weather resistance

Warranty:

• Duofuse wood composite: 25 years
• Duofuse aluminium and 100% plastic parts: 10 years

What is the warranty on Duofuse materials?

• Wood composite: 25 years
• Aluminium and 100% plastic materials: 10 years

Is Duofuse environmentally friendly?

Yes. The material consists of:

• Recyclable composite
• PEFC‑certified wood flour
• Belgian production with full process control

To confirm sustainability, Duofuse also carries independent certifications such as FDES and EcoVadis.

What does the fire classification of Duofuse decking boards mean?

We often get questions about how a deck behaves in a fire, especially for roof terraces and decks close to buildings. Below, we explain what our fire classification means and where it does and doesn’t apply.

Two ways of looking at fire

There are two separate standards for the fire behaviour of a deck. Each one measures something different.

1. Reaction to fire (EN 13501-1)
   How much does the deck itself contribute to a fire? How quickly does the surface ignite and how far does the flame spread? This classification applies to every deck.
2. External fire exposure of roofs (EN 13501-5, BROOF)
   What happens when a roof build-up is exposed to fire from outside, for example burning debris carried by the wind? This classification matters as soon as the deck is installed on a roof or roof terrace.

Our reaction to fire classification

The classification depends on the profile and the colour:

How do you read this? The letter indicates the fire behaviour: Bfl is better than Cfl, and Cfl is better than Dfl. The s-value refers to smoke production: s1 means little smoke.

The classification applies to the complete build-up

The boards were tested and classified in their end-use application, together with the Duofuse system underneath. The classification only applies to this build-up:

• Duofuse aluminium joists DFBA040 or DFBA043
• Duofuse plastic clips DFC005
• a 40 mm air gap beneath the boards
• a substrate of at least class A2fl-s1, a minimum of 6 mm thick and 1350 kg/m³ (for example concrete or fibre cement)
• open joints of up to 6 mm, both lengthwise and widthwise

Are you laying the boards on timber joists, using different clips or placing them directly on insulation or roofing membrane? Then this classification doesn’t automatically apply.

What about the open joints?

The test was carried out with 6 mm open joints, lengthwise and widthwise. The effect of the joints on flame spread is therefore included in the result. In none of the test samples did the flame break through to the substrate.

A deck on a roof?

For roofs, a different classification applies: BROOF(t1). In Belgium, this is the required class. BROOF is not awarded to the board alone, but to the complete roof build-up: decking board, joist, roofing membrane, insulation and supporting structure.

Duofuse does not currently hold a BROOF classification. Planning a roof terrace? Get in touch and we’ll look at your project together.