| Steel doors |
Steel sheet specification, corrosion protection, core material, frame construction, and finish system. |
Material specifications, coating details, product drawings, and test reports for the offered door configuration. |
Confirm that the report covers the same door construction, hardware, dimensions, and finish as the quotation. Steel gauge alone does not establish overall door performance. |
| Aluminum doors |
Profile design, thermal-break construction where applicable, glazing, hardware, and surface finish. |
Profile and glazing specifications, finish documentation, and complete-door performance reports. |
Compare the assembled doorset rather than relying only on profile descriptions. Thermal and weather performance depend on the full frame, leaf, seals, glazing, and installation details. |
| Timber doors |
Timber species or engineered timber composition, moisture control, coatings, joints, and exposure suitability. |
Timber and coating specifications, manufacturing details, and applicable durability or performance test documentation. |
Check whether the stated timber and finish are intended for the project’s exposure conditions. Ask how the product is protected and maintained against moisture and weathering. |
| Fiberglass or composite doors |
Facing material, core, frame, reinforcement, finish, and the way components are joined. |
Product construction details and test reports identifying the complete doorset and its configuration. |
Do not assume that a material description proves strength, insulation, or weather resistance. Compare measured performance and the scope of each test report. |
| Security performance |
Locking points, cylinder and lock specification, hinges, frame anchorage, and resistance to forced entry. |
Applicable test reports and certificates for the exact model; for products sold as Chinese security doors, check relevance to GB 17565-2022. |
Verify the standard edition, tested model, classification or result, issuing laboratory, and report validity. A strong lock by itself does not demonstrate the security performance of the complete doorset. |
| Fire performance |
Fire-door construction, glazing, seals, hardware, frame, and the claimed fire-resistance period. |
Where a fire rating is claimed, request the applicable product certification and test documentation, including evidence relevant to GB 12955-2015 for Chinese fire doors. |
Check that the rating applies to the complete assembly and to the specified size, hardware, glazing, and installation method. A standard exterior entrance door is not automatically a fire door. |
| Weather and thermal testing |
Air leakage, water penetration, wind-load resistance, and thermal performance where required by the project. |
Test reports stating the method, specimen dimensions, results, laboratory, and tested configuration. |
Compare like-for-like results and the test conditions. Performance values should be tied to a defined complete doorset, not presented as an unsupported general claim. |
| Product certifications and standards |
Product-specific approvals for the destination market, plus any required fire, security, or energy-related evidence. |
Certificate number, certificate scope, issuing body, validity dates, applicable standard, and a way to verify the record. |
Distinguish product certification from a test report and from a company management-system certificate. ISO 9001 concerns quality-management systems; it does not certify the performance of a particular door. |
| European-market documentation |
Whether the product falls within the relevant European product rules and the project’s regulatory requirements. |
Applicable declaration and supporting documentation for the specific product and intended use. |
CE marking is not a general quality award. Confirm the applicable product standard and documentation; EN 14351-1 covers windows and external pedestrian doorsets but does not cover fire-resisting or smoke-control doorsets. |
| Supplier and production verification |
Manufacturing capability, traceability, quality checks, packaging, lead time, and after-sales arrangements. |
Factory audit records, inspection plans, sample approval records, traceability details, and written warranty terms. |
Assess production controls and documented inspection practices separately from product certificates. Agree on approved samples, tolerances, packaging, and inspection criteria before order placement. |
