Product Introduction
They are sealed windows that cannot be opened, designed for spaces that require natural lighting but do not require ventilation. They have excellent thermal insulation, sound insulation, and waterproof properties, and can effectively reduce energy consumption and improve the overall energy-saving level of the building. They are suitable for high-rise buildings, stairwells, corridors and other areas, ensuring the beauty and uniformity of the building facade while providing reliable safety and weather resistance.
Key Features
Superior performance, certified quality, and tailored solutions - YY Windows delivers trusted results for global building professionals.
1. Outstanding energy-saving performance
The multi-cavity uPVC frame structure and double/triple-layer insulating glass are combined to effectively reduce heat conduction, meet or even exceed the energy-saving standards in North America (such as Energy Star, CSA certification requirements), and are suitable for passive houses or high-performance residential projects.
2. Superior sealing and sound insulation
The non-opening structure and fully sealed design make it excellent in windproof, waterproof, dustproof and noiseproof, especially suitable for street-side, high-rise or climate-changing areas.
3. Superior sealing and sound insulation
The fixed structure has no moving parts and has stronger wind pressure resistance. It is suitable for high-rise buildings and large-area facade designs to reduce maintenance risks.
4. Low maintenance requirements with long-lasting durability
No opening parts, almost no daily maintenance is required. The uPVC material is UV-resistant and corrosion-resistant, and it still maintains long-term stable performance under extreme climate conditions.
5. Elegant appearance with versatile customization options
The color, shape (such as arc, triangle) and glass style can be customized according to the architectural style to meet the designer's diverse needs for lighting and facade effects.
Top-Selling uPVC Fixed & Lifting Sliding Windows
They provide excellent insulation, effectively blocking out external noise and temperature fluctuations. They contribute to a quieter, more comfortable indoor environment. These windows are also extremely resistant to water and corrosion, making them a durable and low-maintenance choice for modern buildings.
The sliding structure does not need to be pushed outward or opened inward, making it an ideal choice for both ventilation and space utilization. The operation is smooth and light, and the sealing strip can effectively block the penetration of wind and rain, maintaining good thermal insulation and sound insulation.
Why Choose Us
At YY Windows, we combine over 25 years of manufacturing expertise with a commitment to quality, innovation, and customer satisfaction. From energy-efficient designs to hurricane-rated systems, we provide reliable, customizable window and door solutions tailored to your project's needs.
High-quality materials and certified performance
Full customization for residential and commercial projects
Competitive factory pricing with fast lead times
Professional support from design to delivery
Export-ready with NFRC, CSA, and impact certifications
Partner with us for products that meet the highest standards - built to perform, built to last.
uPVC stationary windows vs Aluminium Fixed Windows:
Which Is Right for Your Project?
| Feature | uPVC stationary windows | Aluminium Fixed Windows |
| Material Perception | uPVC is cost-effective and widely used in residential settings. Generally comes in white, with woodgrain options available at higher cost. | Considered more premium due to metallic finish and wider color options. Preferred in commercial or luxury projects. |
| Wind Resistance | Strength relies on internal steel reinforcement. Limited size options due to welding at corners. Not ideal for high-rise or large-span openings. | Naturally strong and customizable by profile thickness. Ideal for large openings and high-rise applications. Mechanically joined frames simplify transport. |
| Durability & UV Resistance | Susceptible to UV damage if not high in TiO₂. Can fade or yellow in harsh sunlight. Hardware performance also affected over time. | High resistance to UV and corrosion, especially with powder coating or anodized finish. Longer service life in coastal and tropical climates. |
| Thermal & Energy Performance | Excellent thermal insulation, ideal for cold climates. Prevents heat loss effectively. | Good thermal performance with thermal break profiles, especially when combined with energy-efficient glass. |
| Noise Insulation | Good performance if well-manufactured. Wool pile seals may degrade over time. Glass quality is critical. | Effective sealing with EPDM gaskets. Noise insulation can be further improved with laminated or double glazing. |
| Design Flexibility | Limited profile sizes and color options. Best for small to medium openings. | Slimmer frames, larger opening sizes, and broader hardware compatibility. Highly customizable for modern architecture. |
| Maintenance | May discolor over time; plastic frames harder to clean. Hardware prone to corrosion if quality is low. | Low maintenance. Frames retain color and finish; metal-to-metal hardware lasts longer and is easier to maintain. |
| Cost Over Product Life | Lower initial cost, but may require earlier replacement if exposed to sun and humidity. | Slightly higher upfront cost, but longer lifespan and better value in the long run. More options across price ranges. |
Simple Installation, Professional Support
Installation generally involves only a few key steps:
✔ Remove the old window
✔ Clean and prepare the opening
✔ Position and secure the new window frame
✔ Seal the gaps and finish with trims
While the process is straightforward, a professional installation ensures better sealing, durability, and overall performance.
At YY Windows, we not only supply high-quality uPVC windows, but also offer reliable installation support and services to make your new build easier.
👉 Contact us today to get a quote!
Our Factory
Shanghai YY Windows Co., Ltd. is a trusted window and door manufacturer with a strong reputation for delivering high-performance solutions for residential, townhouse, hospitality, and commercial projects. Established in 1999, YY has grown into a modern production facility spanning 50,000 square meters, backed by more than two decades of experience in product design, engineering, manufacturing, and global supply.
Our comprehensive capabilities cover every step - from customized design and R&D to precision fabrication and after-sales service. As a forward-thinking enterprise, we adhere to strict quality management systems and international standards to ensure long-lasting performance and customer satisfaction
Our Certificates
Official certification, professional after sales service.
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