| Product Standards and Compliance |
Essential |
Products should be designed and tested against the standards required in the destination market, such as applicable Chinese, European, North American, or project-specific window standards. |
Current test reports, product specifications, declaration of performance where applicable, and a clear explanation of which standard applies to each model. |
15% |
____ |
| Air Tightness |
Essential |
Compare the tested air-leakage result with the project requirement. A lower air-leakage rate generally indicates better resistance to drafts and uncontrolled energy loss. |
Laboratory test report showing the test method, specimen size, pressure difference, air-leakage result, and product configuration. |
10% |
____ |
| Water Tightness |
Essential |
Select a tested water-penetration pressure suitable for the building height, exposure, local rainfall, and installation conditions. Higher exposure normally requires a higher tested pressure. |
Water-penetration test report identifying the complete window assembly, drainage design, test pressure, and pass/fail result. |
10% |
____ |
| Wind Load Resistance |
Essential |
The design pressure and deflection limits should be calculated for the actual location, building height, opening size, glass weight, and frame configuration. |
Structural calculation or test report showing design pressure, mullion or frame dimensions, deflection criteria, and the maximum recommended panel size. |
12% |
____ |
| Thermal Performance |
Preferred |
Compare whole-window U-value rather than frame-only performance. Lower U-value generally indicates better insulation; also review the solar heat-gain requirement for the climate zone. |
Whole-window thermal report listing frame material, glass build-up, spacer, dimensions, U-value, and solar or optical performance where required. |
12% |
____ |
| Glass Safety and Configuration |
Essential |
The glazing specification should match opening size, wind load, human-impact risk, sound requirements, and local safety regulations. Large panes may require tempered, laminated, or heat-strengthened glass. |
Glass make-up, thickness calculation, safety-glazing confirmation, edge-quality requirements, and sample or mock-up approval procedure. |
10% |
____ |
| Frame and Hardware Quality |
Preferred |
Review frame alloy or material, wall thickness, reinforcement, corner joints, gaskets, rollers, handles, locks, and corrosion resistance for the intended environment. |
Material certificates, section drawings, hardware schedule, finish specifications, corrosion-resistance information, and replacement-part policy. |
10% |
____ |
| Fabrication Consistency |
Essential |
The factory should control cutting, assembly, glazing, sealant application, inspection, labeling, and final packing through documented procedures. |
Quality-control plan, incoming-material records, in-process inspection forms, final inspection checklist, traceability method, and nonconformance procedure. |
8% |
____ |
| Customization and Engineering Support |
Project-Based |
The manufacturer should be able to coordinate opening dimensions, drainage, flashing, sill details, interface with walls, screens, blinds, and installation tolerances. |
Shop drawings, BIM or CAD files where required, engineering review workflow, revision control, sample approval process, and site-interface details. |
6% |
____ |
| Packaging and Export Protection |
Essential |
Packaging should protect glass, corners, coatings, hardware, and finished surfaces during handling and international transport while allowing safe unloading at the site. |
Packaging drawings, loading plan, container photos, moisture-protection method, product labels, pallet details, and damage-claim procedure. |
3% |
____ |
| Lead Time and Supply Capacity |
Project-Based |
The production schedule should include approval, material procurement, fabrication, inspection, packing, shipping, and a realistic contingency period. |
Written production schedule, capacity statement, critical-material lead times, milestone responsibilities, and communication plan for schedule changes. |
2% |
____ |
| Warranty and After-Sales Support |
Preferred |
Warranty terms should identify coverage, exclusions, start date, finish and glass limitations, hardware provisions, claim response time, and the process for replacement parts. |
Signed warranty document, spare-parts list, installation and maintenance instructions, service contact, and documented claim-resolution procedure. |
2% |
____ |
