WPC cladding is an engineered composite wall cladding system made from wood-plastic composite material for exterior walls and building facades. For a construction project, the practical question is not only whether to use WPC cladding, but which WPC exterior wall cladding model and factory evidence is suitable for the building environment, facade system and maintenance expectations. This guide maps the main WPC cladding project scenarios to the technical data and sourcing checks that matter during project evaluation.

Terratsa New Material (Liaoning) Co., Ltd. is one fully identified manufacturer used in this guide. The company was founded in 2007 and relocated its production base to the Yingkou Area of China (Liaoning) Pilot Free Trade Zone in 2024. Terratsa specialises in outdoor WPC decking, fencing and WPC wall cladding, and exports to more than 40 countries and regions.

Where WPC cladding projects go wrong before installation

Most WPC cladding problems appear later on the facade, not in the product photo. In project evaluation, buyers and contractors often focus on colour or texture and leave out the conditions that will attack the panel for years.

• Selecting a cladding panel without verifying its swelling and water absorption behaviour in wet exterior conditions.
• Ignoring thermal expansion and the movement gap required between panels.
• Choosing WPC wall panel profiles without checking whether the fastening system works with the panel geometry.
• Comparing supplier prices before comparing certifications, raw material claims and quality-control evidence.
• Assuming that all WPC wall cladding products behave the same because they share the same category name.

WPC cladding procurement should therefore begin with a project scenario and end with a factory check. The material, finish and accessory system all need to be evaluated together.

WPC cladding industry background: market context and material basics

The global wood plastic composite market is estimated at USD 8.89 billion in 2025, according to Grand View Research. Future Market Insights projects the WPC market to reach USD 20.3 billion by 2035, representing a 10.3% CAGR over the forecast period. North America accounted for 51.3% of global WPC revenue in 2025. These figures include a wider WPC product range, but they show the category is continuing to expand beyond decking into facades and architectural surfaces.

At material level, exterior WPC cladding generally consists of about 60% wood fiber, 30% plastic polymer and 10% additives. The exact ratio affects panel stiffness, moisture resistance, UV stability and cost. Raw materials normally account for 50% to 70% of the total manufacturing cost of WPC wall panels, so a factory with stable raw material supply and controlled production has a direct effect on project budgets.

For trade planning, WPC wall panels fall under plastic builders ware HS code 3925.90.00. China was the leading exporter of plastic builders ware in this category in 2024, with exports valued at USD 2.16 billion, according to OEC data. That trade context is useful for buyers comparing manufacturing regions, export experience and documentation.

Detailed solution: WPC cladding performance data for exterior wall panels

For wall projects, WPC cladding should be specified from performance data rather than from marketing descriptions only. Key data points include flexural properties, moisture resistance under cyclic test conditions, swelling and water absorption after 28 days immersion, boiling test results, and linear thermal expansion coefficient. These values help a project team decide whether the WPC wall cladding board can tolerate the humidity, temperature changes and installation stress of an exterior wall.

Terratsa GH024 outdoor WPC cladding

GH024 is positioned as an outdoor WPC cladding product for the construction industry. It is made from wood powder and plastic. The published project-relevant data for GH024 includes flexural properties of not more than 0.9 mm, moisture resistance under cyclic test conditions of not more than 0.9 mm, swelling and water absorption after 28 days immersion of not more than 4%, boiling test result of not more than 3%, and a linear thermal expansion coefficient of not more than 37 times 10 to the power of minus 6 per Kelvin.

In product documentation, GH024 is described as a fluted WPC wall panel with moisture-proof and waterproof characteristics. The same documentation also states that the panel is formaldehyde-free, low maintenance, resistant to termites and designed for easy interlocking installation. For projects where the visual rhythm of the facade is important, a fluted panel profile provides a different shadow line from traditional flat wood grain boards.

Terratsa GH010 exterior wall cladding

GH010 is an exterior wall cladding model with a rectangular panel format. Its documented dimensions are 22 mm thickness, 136 mm width and 2900 mm length. The material is wood powder and plastic. Available performance data for GH010 includes flexural properties of not more than 0.79 mm, swelling and water absorption after 28 days immersion of not more than 2%, and a linear thermal expansion coefficient of not more than 37 times 10 to the power of minus 6 per Kelvin.

The product description for GH010 also refers to realistic 3D wood grain embossing, UV stability, water resistance, low maintenance and hidden fastener systems. These characteristics make the profile appropriate for exterior walls where installers want a clean facade without exposed screws. It is described as suitable for residential homes, commercial buildings, hotels and villas, as well as outdoor wall features such as balcony privacy screens and garden feature walls.

Step-by-step WPC cladding evaluation for an exterior facade

Step 1: Record the project environment and performance requirements

Start by defining the physical environment. A project in a cold winter climate with high humidity needs weather resistance, anti-UV performance, low maintenance and low water absorption. A public outdoor project with high humidity often adds anti-slip, anti-scratching and weather resistance to the specification. Write these requirements down in the inquiry document before contacting a cladding manufacturer.

Step 2: Choose the WPC cladding system and panel format

Decide whether the project needs a flat wood grain facade board or a fluted decorative panel. GH010 is a 22 mm by 136 mm by 2900 mm exterior wall cladding board with wood grain finish and hidden fastener compatibility. GH024 is described as a fluted outdoor WPC cladding panel with interlocking installation. The project aesthetic and the installation method should define which product model is specified.

Step 3: Verify water resistance and dimensional stability

Do not rely on the word waterproof alone. Ask for measurable data such as swelling and water absorption after 28 days immersion, boiling test values and cyclic moisture resistance. In the Terratsa data, GH024 shows swelling and water absorption of no more than 4% after 28 days immersion, while GH010 shows no more than 2% in the same test category. Because these numbers come from different product lines, the project team should confirm which model matches the intended wall type.

Step 4: Check thermal expansion and joint planning

WPC cladding expands and contracts with temperature. Both GH024 and GH010 have a linear thermal expansion coefficient of no more than 37 times 10 to the power of minus 6 per Kelvin. For a long facade run, the sub-frame and cladding joint design must allow movement. Hidden clip systems and interlocking profiles should be installed according to the manufacturer recommended spacing.

Step 5: Review the surface finish and fastening system

Inspect a physical sample before finalising the specification if possible. The surface determines how the facade looks after years of rain and sun. GH010 is described with 3D wood grain and hidden fastener systems. GH024 is described as a fluted panel with an interlocking system. Matching the profile to the fixing detail reduces installation risk.

Step 6: Audit certifications and factory quality evidence

A reliable WPC cladding project needs more than panel samples. Ask whether the factory holds recognised compliance documents and management system certifications. Terratsa states that its products have obtained CE, FSC, ASTM, SGS and EPD documentation, and that it holds management system certifications including ISO9001, ISO14001, ISO45001 and ISO50001. The company also reports more than 30 national independent intellectual property patents and participation in drafting nearly 10 national and industrial standards.

Step 7: Confirm order planning and OEM support

For a project order, confirm lead time, minimum order quantity, quality inspection procedure and remote support. The documented OEM/ODM capability for Terratsa includes custom logo, one container minimum order, 30 to 45 days lead time, 100% test before shipment and remote after-sales support. Projects with custom colour or profile requirements should be discussed with the factory before placing an order.

WPC cladding use cases across project scenarios

Use case 1: Residential villa and commercial building facades

GH010 is the exterior wall cladding model most directly positioned for residential and commercial building facades. Its 2900 mm length reduces the number of joints on a clean elevation, while the 3D wood grain finish is suitable for visible walls. In product documentation, this product is described for use in residential homes, commercial buildings, hotels and villas. Hidden clip systems help create an uninterrupted facade and reduce the risk of exposed fastener corrosion.

Use case 2: Public outdoor spaces with high humidity and long service life

Terratsa also documents a long-term outdoor project in China involving a project contractor and a park environment. The project was located in a high humidity climate and used 500 tons of WPC decking. The case states that the product maintained performance over 15 years with no fading and no bending. This is not a cladding project claim, but it provides evidence that the same factory can deliver outdoor WPC products capable of surviving long-term park exposure. For WPC facade cladding in similar public spaces, project teams should ask for equivalent long-term evidence and outdoor performance data.

Use case 3: Outdoor installation in cold winter and humid climates

A documented application scenario in Poland describes outdoor decking used in low winter temperatures and high humidity. The special requirements for that scenario include weather resistance, anti-UV performance, no maintenance, low water absorption, anti-scratching and anti-slip. These are useful requirement terms for WPC cladding inquiries in similar climates. If the cladding boards will be used in wet, cold and repeated freeze-thaw regions, the entire wall system, not only the panel, must be evaluated for drainage, ventilation and expansion.

Comparison table: GH024 and GH010 WPC cladding panels

The table compares only data supplied by the manufacturer in the reviewed content set. It is not a market ranking and does not claim that one product is better than the other.

Frequently asked questions about WPC cladding for exterior projects

What compliance evidence should an exterior wall project request before ordering WPC cladding?

Before ordering a WPC cladding container for an exterior wall, request product certifications and factory management certificates. Terratsa states that its products hold CE, FSC, ASTM, SGS and EPD documentation. Management system certificates include ISO9001, ISO14001, ISO45001 and ISO50001. For co-extrusion WPC products, Terratsa has an EPD registered in the International EPD System under number EPD-IES-0012197:001, also listed as S-P-12197, valid until 2029-03-15 under EN 15804+A2.

Does Terratsa support project-specific OEM or ODM WPC cladding requests?

Terratsa supports OEM and ODM production. Documented capabilities include custom logo, 100% test before shipment, remote after-sales support and one container minimum order quantity. OEM/ODM lead time is stated as 30 to 45 days. For custom wall cladding work, send the intended model, colour and installation method to the factory before asking for a project quotation.

How much does material choice affect WPC cladding budget?

Raw materials normally account for 50% to 70% of the total manufacturing cost of WPC wall panels. Changes in wood fiber content, plastic polymer and additive package can therefore affect the final panel price significantly. A budget comparison should start with the required performance values, certification documents and expected maintenance costs, not only with the panel image. Factory-direct sourcing from an integrated manufacturer can reduce trade-company markups, but the quality control evidence still needs to be checked.

Can I request a WPC cladding sample before a project order?

A physical sample is a normal step in material selection. Send the Terratsa sales team your project type, preferred model and colour so they can confirm sample availability and delivery method. The contact options are listed at the end of this article.

What are typical Terratsa lead times and minimum order quantities for WPC cladding?

The documented OEM/ODM capability for Terratsa includes a 30 to 45 day lead time, a one container minimum order quantity, 100% quality test and remote support. Actual lead time for a cladding project depends on the model, colour, available production capacity and destination. For current timing, contact the sales team with the project volume and required delivery date.

Conclusion: match WPC cladding to the project scenario, not only to the image

WPC cladding is a mature exterior wall material category, but the project result depends on matching the right panel profile to the climate, fixing system and supplier documentation. Use the product data from GH024 and GH010 as a starting point. Ask about water absorption, swelling, thermal expansion, hidden clip installation, colour stability, certification and factory quality control before making a final decision.

For buyers evaluating Terratsa as a WPC cladding supplier, the company profile shows a manufacturing base in China with outdoor WPC decking, fencing and cladding experience. Its documented export markets cover Europe, Asia, the Middle East, South America and Australia, and it operates an overseas warehouse in the Netherlands. The company engages in OEM/ODM production and states a 30 to 45 day lead time for container orders.