about us
Provide design and manufacture of doors and windows for Hospitality, Residential, Healthcare and Commercial
800 +
Projects Completed
1,000 +
Hardware Options
100 +
An Excellent team to support you
100,000㎡
Factory Areas
2,500+
Satisfied Customer
+
Years Experience
Welcome to Grandsea
Chinese Premium Aluminum Door & Window Manufacturer
Exquisite craftsmanship, advanced manufacturing technology and high-quality raw materials are the key factors to our success. We incorporate these cutting-edge technologies into every door and window we produce, ensuring that all products meet and exceed industry standards.
Windows Tailor-Made
We offer a wide variety of windows with differing opening styles such as sliding, casement, and tilt-and-turn so that they flexibly match your spatial needs. Our focus goes beyond effortless window operation and includes smooth maneuverability, ventilation optimization, and overall enhancement of the user experience for all components.
Comfort-Centric Doors Soluction
With the employment of advanced insulation technology and noise reduction techniques, external sound is effectively deflected and internal temperatures are maintained, thus providing a constant indoor temperature. These features culminate in an elevated living experience.
Excellence Hardware Accessories
High-quality and rugged doors are fitted with reliable additional hardware as side components. All equipment including locks, hinges, and handles are fitted such that high standards for strength, safety, and long-term dependable use are expected. Hence the windows and doors are provided with effortless and safe.
Cutting Edge Materials
The use of advanced thermal insulation and thermal break techniques brings the heat transfer with our alloy doors and windows to a minimum. In terms of energy grant, Grandsea products are invaluable in the offer which is known for its remarkable energy efficiency saving the customer value and environment for years to come.
why choose us
save money & time
Grandsea provides customers with doors and windows of higher value and quality through fine optimization of production processes and improvement of supply chain management, while maintaining a certain price advantage to benefit more people.
Custom tailoring services
We pay attention to all the details, be it size, color or even cut. We ensure that we meet customer needs in the design and production processes. The design team will interact with you so that the end product serves the intended purpose and blends seamlessly into your architectural style.
Top-notch standards
Using advanced production techniques ensures that every door and window manufactured by Grandsea is of exceptional quality, Alongside top grade raw materials. With international production standards being a lightweight guideline to follow. All products undergo thorough testing for durability, soundproofing, and waterproofing, meeting global standards.
Excellent after-sales service
Grandsea offers complete after sale service like providing step by step installation instructions, maintenance outlines, trouble shooting sessions, and other services. During the usage period, clients will never be ignored and solutions will be proffered within short windows no matter the complexity level triggered.
2500+ global customers choose us
Grandsea Building provides high-quality window and door products for the hospitality industry | residential industry | healthcare industry | education industry | commercial industry, including:
- Houses and villas
- Apartments
- Hotels
- Offices
- Schools
- Hospitals
What Our Customers Reviews
As leading custom doors and windows manufacturer in China, Grandsea uses high-quality products to bring you the best user experience
leading doors and windows manufacturer in China
As an industry-leading door and window manufacturer, we are committed to providing customers with high-quality and diversified aluminum window solutions. As a well-known aluminum windows manufacturer, our product line covers a full range of needs from residential aluminum window manufacturers to commercial aluminum window manufacturers. Our professional team is not only proficient in the technology of aluminum storm windows manufacturer, but also has rich experience in the field of aluminum clad wood window manufacturers. With advanced production equipment and innovative design concepts, we are proud to be among the best aluminum window manufacturers. Whether it is facing the protection needs of severe weather or pursuing commercial projects that are both beautiful and practical, we can provide customized solutions. We focus on product quality, attach importance to customer experience, and continuously promote the development of industry standards. Choosing us means choosing a professional, reliable and excellent door and window partner. Let us work together to add the perfect finishing touch to your construction project.
