Windows and doors are the eyes and guardians of a building, their quality directly determining the comfort and safety of a home. Choosing Hangzhou Minglei means acquiring not only superior products but also long-term, reliable peace of mind. We solemnly commit to providing industry-leading, clear, and transparent warranty services, ensuring every window and door stands the test of time.

Our Warranty Commitment: Tiered and Comprehensive

We understand that windows and doors consist of different systems, each with varying performance and lifespan expectations. Therefore, we reject a "one-size-fits-all" warranty approach in favor of a scientific, detailed, tiered warranty system that precisely covers every core component of our products.

1. Core Performance Guarantee: 25-Year Glass Seal Warranty

Our most proud commitment is the 25-year ultra-long warranty against "air leakage and fogging" provided for all standard Insulating Glass Units.

What is Covered: We guarantee that the internal seal (TPS technology) of the glass will not fail within the warranty period, completely preventing thermal performance loss, internal fogging, or dust ingress due to sealant issues.

Why It Matters: The integrity of the glass seal is central to the energy efficiency, sound insulation, and appearance of windows and doors. This industry-leading 25-year warranty is a testament to our absolute confidence in our material technology and manufacturing processes.

2. Main Product Warranty: 10-Year Material & Workmanship Guarantee

We provide a 10-year warranty on materials and workmanship for all 70/705/76/80/101 Series thermal break aluminum windows and 152 Series lift & sliding doors / 80 Series folding doors manufactured by Hangzhou Minglei.

What is Covered: This warranty guarantees that the profiles are free from material defects such as cracking, warping, or corrosion, and that surface coatings show no abnormal peeling or fading.

Conditions: This warranty applies to the original purchaser of the product, provided it is under normal use and service conditions.

3. Mechanical Parts Warranty: 10-Year Worry-Free German Hardware Operation

All German-brand mechanical hardware used in our windows and doors is covered by a 10-year warranty.

What is Covered: This ensures that all mechanical components such as handles, hinges, espagnolettes, and locks are free from material or manufacturing defects and operate smoothly under normal use.

Service Method: For parts confirmed to have quality issues, we will supply replacement parts at no charge. 

4. Special Component Note: Blinds-between-Glass

For the more complex Insulating Glass Units with inside blinds, the glass unit itself carries a 3-year warranty. The window/door main frame and hardware housing it still enjoy the respective 10-year warranties. 

Clear Explanation of Key Warranty Points

A reliable warranty should clearly state both what is covered and what is not. We adhere to the principle of transparency to help you better understand and utilize this benefit.

The Core of Coverage

Our warranty is designed to cover "manufacturing and material defects" inherent to the product itself—issues present from the time of manufacture that manifest under normal use.

Typical Exclusions (Non-Covered Situations)

To ensure clear responsibility, the following situations are typically not covered under warranty. This aligns with industry standards and ensures the fairness of the warranty:

• Improper Installation: Problems arising from installation not performed by Hangzhou Minglei or its authorized service partners.
• Accidents & Acts of God: Such as fire, flood, earthquake, vandalism, etc.
• Misuse & External Influences: Damage caused by exposure to harmful chemicals, building settlement or movement, stress from excessive temperature differentials, etc.
• Normal Wear & Aging: The gradual hardening of gaskets over time, natural weathering of surfaces due to sun and elements, etc.
• Exceptional After-Sales Support: 24-Hour Rapid Response
• A warranty is more than just a document; it's about timely and effective service. We promise:
• Fast Response: Regardless of any issues encountered during installation or use, we will respond within 24 hours.
• Efficient Resolution: For parts confirmed to need replacement, we will arrange prompt shipment via international courier. Parts in stock are shipped immediately, while non-stock items are handled as quickly as possible based on procurement lead time (typically 10-15 days).

Conclusion: Choose Minglei, Choose Lasting Assurance

The Hangzhou Minglei warranty policy is our endorsement of product quality and our return on long-term customer trust. From the 25-year glass seal guarantee to the 10-year comprehensive product and hardware coverage, we have built an all-round, focused protection system.

We invite you to choose not just a high-quality window or door, but a sustainable promise of assurance and peace of mind. Let's witness the quality of time, together.