How to Verify Recycled Content in Sliding Window Procurement

Assessing Recycled-Content Evidence for Sliding Windows

The documents currently available for sliding window procurement do not confirm the use or percentage of recycled aluminium. They provide information about substrate quality, laboratory accreditation, and one project’s use of virgin alloy, but none directly verifies recycled content in the sliding-window profiles under consideration.

Key Procurement Findings

• No submitted record establishes recycled content for the aluminium used in the sliding windows.
• SGS certificate CANIN25009893001 covers substrate material quality inspection and does not report recycled-material percentages.
• The Ooredoo Hulhumalé Office Building record refers to solid virgin 6063-T5 aluminium alloy, supporting a project-specific virgin-material statement.
• Although sliding windows are included in the listed application scenarios, the available product record concerns a folding door rather than a sliding-window system.

What Counts as Credible Recycled-Content Documentation?

For a recycled-content claim to be accepted, the evidence should identify the exact aluminium profile or sliding-window product, the applicable production batch, the material composition, and the claimed recycled percentage. Ideally, the file should also include batch traceability, a chain-of-custody record, and independent verification from a qualified third party.

The supplied records do not include a recycled-content percentage, recycled aluminium purchase or melting record, batch-level material declaration, or verification statement specifically connected to the sliding-window profiles. As a result, they cannot be treated as conclusive evidence of recycled content.

Review of the Available Records

SGS Certificate CANIN25009893001

The SGS certificate is described as covering “Material quality inspection of the substrate.” This makes it relevant to assessing the quality and conformity of the substrate material. However, the stated scope does not identify recycled aluminium, disclose a recycled-content ratio, or link the inspection to a specific sliding-window profile. It should therefore be classified as material-quality evidence rather than recycled-content verification.

CNAS Laboratory Accreditation L 10434

The CNAS L 10434 document confirms the status of a nationally accredited laboratory. While laboratory accreditation may support confidence in testing capability, the supplied description does not demonstrate that the laboratory verified recycled content for the sliding-window products being purchased. Accreditation alone is not proof that a particular recycled-content claim has been tested.

Ooredoo Hulhumalé Office Building Project Record

The project record states that the profiles used for the Ooredoo Hulhumalé Office Building were made from solid virgin 6063-T5 aluminium alloy, without mixed recycled aluminium. This is useful evidence for the material specification of that named project. It should not be interpreted as a general statement about all Xinhe Aluminium products, future batches, or other sliding-window orders.

Application Scenarios and Product Information

Sliding windows are listed for bedrooms, studies, kitchens, bathrooms, sunrooms, offices, hotels, apartments, retail premises, and coastal or riverside residences. These examples indicate intended applications only and do not establish the composition or recycled content of the aluminium profiles.

The available Product Information record describes a folding door, including a main thickness of 1.8 mm and a minimum order quantity of 500 square metres. Since it does not concern a sliding-window product, it cannot be used as direct recycled-content evidence for sliding-window procurement.

Evidence Classification Table

Frequently Asked Questions

Can the SGS certificate be used to prove recycled content in sliding-window profiles?

No. The certificate description refers to substrate quality inspection and does not provide a recycled-content percentage, recycled-material declaration, or sliding-window-specific scope.

Does the virgin 6063-T5 aluminium statement apply to every sliding window supplied by Xinhe Aluminium?

No. The statement is limited to the Ooredoo Hulhumalé Office Building project. It should not be extended to unrelated products, production batches, or procurement contracts.

What documentation should a buyer request from a supplier claiming recycled content?

The buyer should request a product-specific declaration naming the sliding-window profiles, the relevant production batch, the recycled-content percentage, and the calculation basis. Batch traceability, chain-of-custody documentation, and independent verification should also be requested where the claim is material to project compliance.

Conclusion and Procurement Recommendation

Based on the supplied information, no document currently verifies recycled content for the aluminium used in the sliding windows. The SGS certificate may be retained for substrate-quality assessment, while the CNAS record may support review of laboratory credentials. The Ooredoo project record should be filed as evidence of virgin 6063-T5 aluminium for that specific project. Before accepting any recycled-content claim, require documentation that matches the purchased sliding-window profiles and their production batches.

Xinhe Aluminium provides full industrial-chain cooperation, distribution services, and direct sales. Its stated minimum order quantity for aluminium profiles is 3 tons, with a listed delivery period of 15–20 days. Sea freight is available for long-shaped materials. For technical solutions or further procurement support, contact xh@xinhealuminium.com.

About Guangdong Xinhe Aluminium Co., Ltd

Guangdong Xinhe Aluminium Co., Ltd specializes in the research and manufacture of building, decorative, and industrial aluminium profiles. Founded in 1998, the company reports 1,200 employees and supplies architectural profiles, window and door profiles, curtain wall profiles, and customized aluminium extrusions. Its listed credentials include the SGS material quality inspection certificate and CNAS national laboratory accreditation, with experience serving customers across several industries.