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Should you choose wood plastic slats or aluminum slats for outdoor decoration projects?

When faced with the decision to decorate the facade, build a pergola or create a partition for the living space, many people often wonder: "Should I choose wood plastic slats or aluminum slats?".

Railing bring the warm, close beauty of wood; aluminum slats yet exudes the sharpness and modernity of metal. Each choice has its own advantages and disadvantages, directly affecting the aesthetics, durability and cost of the entire project.

Aluminum slats and wood plastic slats
Aluminum slats and wood plastic slats

What role do slats play in architectural works?

Louvers are long rectangular bars made from many types of materials such as aluminum, natural wood, wood-plastic composite (WPC), etc., often used in exterior and interior architecture to create aesthetic effects, shade, divide space, and shape the overall layout.

  1. Sunshade and heat insulation function: Sunshade helps reduce direct solar radiation. As a result, the interior space is cooler and saves air conditioning energy.
  2. Decorative function: Creates a striking visual highlight for home facades, fences, balconies, or pergolas, bringing a sense of luxury and style.
  3. Space separation function: Used as a partition to divide space in a subtle way, without causing claustrophobia or completely obscuring it.
  4. Making a Pergola: Blue joins the pergola, creating an artistic outdoor lounge area.
Applications of slats
Applications of slats

Statistics from Building Science Journal in March 3: “Statistics show that approximately 30% to 40% of a commercial building’s unwanted cooling energy comes from heat gain through windows. Solar shading is the first and most effective line of defense to address this problem at the source, before the heat enters the building.”

Comparison of wood plastic slats and aluminum profile slats

Wood plastic slats and aluminum profile slats are compared based on 7 Criteria: Materials, aesthetics, design, color fastness, cost, weight and thermal conductivity.

Criteria
Railing
Aluminum slats
Resources
Made from a mixture of wood powder, plastic (PE, PVC) and additives. The surface can be coated with ASA or protective Polymer.Made of aluminum alloy. Powder coated surface
Aesthetics
Wood plastic brings a rustic, natural feeling, very suitable for Tropical, Rustic, Scandinavian style projects, or spaces that need relaxation such as resorts, homestays, garden cafes.With sharp, straight surfaces, aluminum profiles are suitable for modern, minimalist, industrial or high-tech styles. They are an ideal choice for showrooms, offices and luxury villas.
Models
Real wood grain with rough surface.Diverse colors with electrostatic paint, can imitate wood grain.
Reliability
Lifespan 7 – 20 years. The slats are water resistant, termite-proof, and warp-resistant.Lifespan 15 – 25 years. The slats do not oxidize, rust, or deform when the weather changes.
Treatment cost
Lower initial investment cost, suitable for limited budget. Almost no maintenance required, just periodic cleaning.
Price of 50x150mm wood plastic box slats: ~ 129.000 VND/meter (Material price updated July 2025).
The cost is significantly higher, but there is almost no additional maintenance cost, providing long-term value.
Price of 50x150mm aluminum box-shaped slats: ~ 235.000 VND/meter (Material price updated July 7).
Weight
Heavier weight, requires a sturdy frame and careful construction, especially with high hanging louvers.
ASA wood plastic slat weight: 1,5 - 4,8kg/3m bar
Weight of 1 layer wood plastic slat: 2,5 - 18kg/3m bar
Light weight (~2,7kg/3m bar) helps reduce the load on the foundation of the construction. Flexible construction, easy to shape, quick transportation.
Thermal Conductivity
Wood plastic slats do not absorb and accumulate heat like metal, the surface always maintains a stable temperature even under harsh sunlight, helping to keep the space cool and save significant cooling energy in the summer.Aluminum slats have high thermal conductivity, when used outdoors there will be heat exchange with the surrounding environment.
To optimize space comfort, Kosmos recommends combining with suitable insulation solutions or choosing high-end wood grain aluminum lines with better insulation capabilities.
Aluminum slat sample
Aluminum slat sample
Wood plastic slat sample
Wood plastic slat sample

Frequently asked questions when choosing outdoor decorative slats

When should you choose aluminum profile?

You should choose aluminum profile bars when:

  1. Pursuing modern, high-end architectural style.
  2. The project requires long-term durability and no periodic maintenance.
  3. Construction in coastal areas, hot sun.
  4. Willing to invest to optimize the long-term architectural value of the house.

Aluminum slat colors are quite diverse, including basic colors such as white, black, gray, brown, blue, yellow, and wood grain colors such as yellow wood grain, red wood grain, and brown wood grain.

When should you choose wood plastic slats?

You should choose wood plastic slats when:

  • Love rustic style, close to nature.
  • The initial budget needs to be economical while still achieving aesthetics.
  • Spaces that need relaxation such as balconies, gardens, outdoor partitions.

Wood plastic slat color quite diverse such as: Teak, Walnut, Light Wood, Coffee,...

Do wood plastic slats fade in the sun?

Wood plastic slats may fade slightly after a long period of direct exposure to harsh sunlight. However, high quality products today often have an ASA or Polymer coating to help protect against UV rays and minimize fading.

What should I do if the powder coated surface of the aluminum slats is scratched?

The powder coated surface of aluminum is quite durable, but can still be scratched by strong impacts. For small scratches, you can use specialized paint of the same color to patch them. For major damage, replacing the new louver can be the best solution to ensure the uniform aesthetics of the project.

How is the installation process of wood plastic slats and aluminum slats different?

Basically, both require a fixed skeletal system. However:

  • Aluminum slats: Thanks to its light weight, construction is more flexible and faster. Aluminum slats are usually connected to each other and to the frame with locking grooves, brackets and screws.
  • Wood plastic slats: Usually connected to the frame with screws and brackets. Many types are heavy (eg: 1-layer wood-plastic slats must have additional stainless steel bars threaded into the core), the process of transporting and lifting to high places requires more care.

Refer to the video of wood plastic sunshade slat construction below!

Wood plastic slats bring warmth, optimize costs and beauty in harmony with nature. Meanwhile, aluminum profile slats are a statement of modernity, class and timeless durability.

Smart consumers need to understand their own needs, consider the combination of desired architectural style, environmental conditions, allowed budget and long-term use value. Kosmos is ready to advise you further via phone number 0932.067.388.

The information, images, and content posted on the website. Kosmos.vn The aim is to provide reference information on products, materials, and application solutions in construction, interior and exterior decoration.

The information in this article may change over time, depending on actual construction conditions, technical standards, or specific product lines. Kosmos does not guarantee that the content on this website is completely accurate or perfectly suitable for all projects or purposes.

Customers and partners should:

  • For further technical advice, consult with the construction company, architect, or specialist engineer.
  • Check the specifications, design, and actual usage conditions before deciding to purchase and install.

Kosmos is not responsible for any risks or damages arising from the application of information on this website without consultation or confirmation from a professional.

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