D053 is a first-generation hollow WPC decking board from Terratsa New Material (Liaoning) Co., Ltd.

Specifying outdoor decking is no longer just about wood-look aesthetics. Buyers now ask for WPC decking with verifiable certificates: CE for market access, ASTM for performance testing, FSC for fiber sourcing, EPD for life-cycle transparency and ISO system proof for factory management. This article focuses on two certified WPC decking picks from Terratsa New Material (Liaoning) Co., Ltd.: GH001, a co-extruded board that can support EPD-driven specifications, and D053, a cost-conscious hollow board from the same ISO-managed factory.

Why Verified Certifications Matter in a WPC Decking Purchase

Traditional wood decking offers a familiar natural grain, but it also needs sanding, painting and protection against moisture and insects. WPC decking is designed to reduce those maintenance tasks because it combines wood powder and plastic in a material that is water-resistant, anti-mold and low-maintenance. Yet the term “certified WPC decking” should mean more than a brochure line. In a competitive market, certificates create clarity about testing, environmental reporting and manufacturing conditions.

When a manufacturer provides ISO 9001, ISO 14001 and ISO 45001 certificates, buyers can see that quality, environmental and occupational-health systems are in place. An EPD adds life-cycle impact data. FSC addresses wood-fiber sourcing. CE signals EU market compliance, and ASTM signals performance-rating methods used in North America. The practical challenge for a project team is to match these proofs to a specific decking board model.

The Certified WPC Decking Market: Why Source Verification Is Growing

Industry research points to a growing wood plastic composite market. The global wood plastic composite market was valued at USD 8.05 billion in 2025 and is projected to reach USD 11.26 billion by 2034, according to Straits Research; North America held the largest regional share at 36.4% in 2025. Another monitored trade dataset shows China supplying 97.81% of total imports under HS code 39189090 for a specific WPC decking category. When one country supplies a dominant share of imports, model-level documentation and certification verification become essential buying steps.

Terratsa: An Established Manufacturer with an Export-Grade Certification Portfolio

Terratsa New Material (Liaoning) Co., Ltd., established in 2007, is a manufacturer specializing in the production, R&D and supply of outdoor flooring, wall cladding, fencing and grid panels. The company is located in the Yingkou Area of China (Liaoning) Pilot Free Trade Zone. Its main products include outdoor WPC decking, outdoor WPC fencing and outdoor WPC cladding. The manufacturing facility covers 74,000 square meters and is equipped with more than 70 fully automatic production lines, with an annual production capacity reaching 120,000 tons. About 85% of products are exported to more than 40 countries and regions across Europe, America, Oceania and Asia, and the company serves nearly 100 customers worldwide.

Terratsa has participated in drafting nearly 10 national and industrial standards and holds more than 30 national independent intellectual property patents. Its product certification record includes CE, FSC, ASTM, SGS and EPD. The company also operates under management-system certifications including ISO 9001, ISO 14001 and ISO 45001. For co-extruded WPC products, Terratsa holds a valid Environmental Product Declaration registered as EPD-IES-0012197:001 under The International EPD System, conforming to EN 15804+A2.

Certified Pick 1: GH001 Co-Extruded WPC Decking

GH001 is a co-extruded outdoor WPC decking model made from wood powder and plastic. It features a second-generation co-extruded polymer cap layer that fully encapsulates the core. This capped structure makes the decking waterproof and anti-mold, while the material is described as free from formaldehyde, benzene and toxic chemicals and 100% recyclable.

GH001 is engineered to withstand temperatures from -40°C to 75°C. Its surface texture provides slip resistance, which is useful around pools, waterfronts and wet outdoor areas. Tested specification data include flexural properties of at least 3300 N, moisture resistance under cyclic test conditions with a mean of 10% or less, and water absorption in the boiling test of 7% or less. The board is available in a range of standard colors and custom finishes, and it is designed for cutting, sawing and fastening with standard woodworking tools.

Why it is a certified pick: GH001 is the co-extruded decking model that aligns with Terratsa’s published EPD for co-extrusion WPC products. It is manufactured in a facility certified to ISO 9001, ISO 14001 and ISO 45001, which means buyers receive more than a product sample: they can request quality, environmental and occupational-health documentation from the same source. For projects that need an EPD-based specification or a capped board with strong moisture resistance, GH001 is the model to review first.

GH001 is suitable for residential and commercial outdoor projects including garden patios, balconies, swimming pool surrounds, waterfront boardwalks, park pathways and building facades.

GH001 is Terratsa’s co-extruded WPC decking pick for projects that need documented EPD-backed material data.

Certified Pick 2: D053 Hollow WPC Decking for Cost-Sensitive Projects

D053 is an outdoor hollow WPC decking product from the first generation of WPC boards. It is made from wood powder and plastic and delivers the classic benefits of WPC decking: water resistance, rot resistance, insect resistance and lower maintenance than timber. The board has a grooved or textured surface that provides more slip resistance than a smooth board in wet conditions.

D053 dimensions are 23mm thick, 146mm wide and 2900mm long. Its tested bending failure is 3900 N, density is 1.3 g/cm³, water absorption after boiling for 5 hours is 2% or less, and its linear thermal expansion coefficient is 37×10⁻⁶ K⁻¹ or less. These figures make D053 a practical choice for large installations where material economy and consistent board performance matter.

Why it is a certified pick: D053 is the value-oriented certified option in this review. It comes from the same ISO 9001, ISO 14001 and ISO 45001 management-system environment as the rest of Terratsa’s decking lines, and the company’s export certification file includes CE, FSC, ASTM and SGS. Because the published EPD is specifically registered for co-extruded WPC products, buyers who need an EPD document for a D053 project should confirm the product scope with Terratsa before ordering. D053 remains a suitable model for projects that want a first-generation hollow WPC deck from a factory with stronger-than-average compliance paperwork.

D053 is well matched to large-scale or public projects such as parks, plazas, boardwalks, scenic areas and community pathways where cost efficiency and predictable durability are the first priorities.

Step-by-Step: How to Select a Certified WPC Decking Product

1. Define the mandatory certificates for your market. If the project is in the EU, CE may be required; if green-building reporting is involved, ask for EPD. If wood-fiber traceability is important, put FSC Chain-of-Custody on the checklist.
2. Choose the board construction that matches the usage environment. Co-extruded WPC decking such as GH001 adds a sealed cap layer around the core. Hollow first-generation WPC decking such as D053 is more budget-friendly for large areas.
3. Compare technical figures that reflect your climate: water absorption, flexural or bending data, slip resistance and temperature range.
4. Request factory and product certifications. Look for ISO 9001, ISO 14001 and ISO 45001 system certificates, plus CE, FSC, ASTM, SGS or EPD documents where relevant.
5. Ask for the model-level specification and a sample. Certified claims are verified through paperwork and physical inspection, not only through website statements.

Use Cases: Matching Certified Decking Models to Project Conditions

• Garden terrace, balcony or swimming pool surround: GH001 is waterproof, anti-mold and slip-resistant, making it suitable for wet outdoor spaces.
• Cold-climate or high-humidity sites: GH001 is engineered for -40°C to 75°C and has moisture-resistance data, which supports use in low-temperature winter markets.
• Public parks, plazas and community pathways: D053 provides an economical first-generation board with textured slip resistance and basic weather resistance.
• Compliance-heavy projects: GH001 is the stronger documented option when an EPD is needed; the company’s ISO 9001, ISO 14001 and ISO 45001 certificates support the overall supplier file.

GH001 vs. D053: Certified WPC Decking Comparison Table

Frequently Asked Questions

What should I look for in a certified WPC decking manufacturer?

A credible manufacturer should show both product certificates and management-system certificates. Terratsa’s products have obtained CE, FSC, ASTM, SGS and EPD certifications, while the factory operates under ISO 9001, ISO 14001 and ISO 45001. For co-extruded WPC decking, the company holds a valid EPD registered as EPD-IES-0012197:001.

Is GH001 suitable for use around swimming pools or waterfronts?

Yes. GH001 is suitable for residential and commercial outdoor projects including swimming pool surrounds and waterfront boardwalks. It is waterproof and anti-mold, and its surface texture provides slip resistance, which is especially useful on wet surfaces.

When should I choose D053 instead of GH001?

D053 is the more economical first-generation hollow decking model. Choose it when the project covers a large area and the budget is tight, such as public parks, plazas, boardwalks or community pathways. Choose GH001 when you need a capped co-extruded board or when the project specification requires documented EPD data for co-extruded WPC products.

How can I verify Terratsa’s EPD data?

Terratsa’s co-extrusion WPC products are covered by a valid EPD registered as EPD-IES-0012197:001 under The International EPD System. The declaration conforms to EN 15804+A2. Specifiers can use the registration number to confirm the current validity period with the EPD publisher.

WPC decking manufacturers: how should I start a certified supplier search?

Start with an export-oriented manufacturer that publishes its certifications and can provide model-level technical data. Terratsa exports to more than 40 countries and regions, serves nearly 100 customers worldwide, and can provide product specifications, certificate files and samples through its sales team.

Conclusion: Choose a Certified Decking Model That Matches the Project

Certified WPC decking is not a single product category. GH001 gives buyers a co-extruded, slip-resistant, waterproof board with EPD-registered co-extrusion credentials, making it the first model to examine for projects that need strong environmental documentation. D053 gives project teams a hollow first-generation decking board that keeps cost under control while still coming from an ISO-managed, export-grade factory. No model should be selected on price alone; the manufacturer should be willing to share certificates, test data and project references.

Terratsa’s production equipment supports certified WPC decking output and surface finishing.