The PVC Double Hung Window from Xiamen KDSBuilding is designed to provide versatility, comfort, and durability in one elegant package. Both the upper and lower sashes can slide vertically, allowing flexible ventilation options while maintaining excellent energy performance. Crafted from premium PVC profiles, this window offers exceptional resistance to corrosion, fading, and weathering, ensuring long-term durability with minimal maintenance. The double-glazed glass and multi-chamber frame design deliver outstanding thermal insulation and sound reduction, keeping interiors comfortable and quiet all year round. Each sash is counterbalanced for smooth, effortless operation, and both can tilt inward for easy cleaning from inside the room—an ideal feature for multi-story buildings. With airtight sealing and advanced locking systems, the PVC Double Hung Window prevents air and water leakage, enhancing energy efficiency and security. Available in various colors and finishes, including classic white and woodgrain textures, it perfectly complements diverse architectural styles. Certified under NFRC and CE standards, KDSBuilding’s PVC Double Hung Window combines modern functionality with timeless design, making it a preferred choice for homeowners, architects, and developers seeking reliable, attractive, and eco-friendly window solutions.

The Aluminum Double Hung and Tilt Window from Xiamen KDSBuilding combines elegant design, smooth functionality, and outstanding thermal performance for modern residential and commercial projects. Manufactured with high-quality thermal break aluminum profiles and double-glazed insulated glass units, this window ensures excellent energy efficiency, sound insulation, and condensation resistance. The double-hung mechanism allows both the upper and lower sashes to slide vertically for flexible ventilation, while the tilt function provides easy inward tilting for convenient cleaning and secure airflow control. Its precision-engineered frame features advanced weather seals that enhance air and water tightness, ensuring long-term durability even in extreme climates. With powder-coated or anodized surface finishes available in a wide range of colors, it achieves both strength and style. Designed to meet international standards such as NFRC and CE, KDSBuilding’s aluminum double hung and tilt window is ideal for high-end apartments, villas, and public buildings that demand superior thermal insulation, low maintenance, and contemporary aesthetics. This window delivers a perfect blend of practicality and sophistication, offering homeowners lasting comfort and performance with modern architectural appeal.

KDSbuilding`s UPVC double hung window produced with advanced technology, good quality material and good quality glass. Our products are customized, color, style and other. The fiberglass or stainless fiberglass screen are easy to install and clean.

PVC double hung windows combine traditional aesthetics with modern functionality, featuring two vertically sliding sashes that can move independently. Both the upper and lower sashes tilt inward, making cleaning easy and safe from inside the home. Constructed with durable, weather-resistant PVC frames, these windows offer excellent insulation, sound reduction, and energy efficiency. Their low-maintenance design resists warping, fading, and corrosion, making them ideal for all climates. With customizable colors, grid patterns, and glazing options, PVC double hung windows suit a wide range of architectural styles. They provide superior ventilation, user-friendly operation, and timeless appeal for residential or commercial spaces.

PVC double hung windows combine traditional aesthetics with modern performance. Featuring two operable sashes that slide vertically, these windows provide flexible ventilation from the top, bottom, or both. Built from reinforced uPVC, they offer excellent energy efficiency, sound insulation, and weather resistance. Both sashes can tilt inward for easy cleaning and maintenance. With options for double or triple glazing, Low-E glass, and various color finishes, these windows are ideal for residential and light commercial applications. Their classic appearance, smooth operation, and low maintenance make them a practical and stylish choice for any building design.

PVC hand crank casement windows combine classic side-hinged design with modern performance and durability. Designed to open outward with the turn of a smooth-operating crank handle, these windows provide excellent ventilation control, unobstructed views, and superior sealing performance. Crafted from high-quality uPVC profiles and internally reinforced with galvanized steel, our casement windows are built for long-lasting strength and weather resistance. The multi-chambered frame enhances thermal insulation, while compression seals along the sash perimeter ensure airtight and watertight performance—ideal for energy-efficient homes and buildings. Each window is equipped with a corrosion-resistant crank handle, multi-point locking system, and friction hinges for secure, effortless operation. Glazing options include single, double, or triple glass units with Low-E coating, argon gas fill, and laminated or tempered glass for added insulation and security. Available in a variety of frame colors, finishes, and grille patterns, our hand crank casement windows can be tailored to suit modern or traditional designs. Easy to maintain and built to meet international standards such as NFRC and CE, they are ideal for residential homes, villas, and commercial buildings in diverse climates. KDSBuilding’s PVC crank casement windows offer the perfect balance of function, aesthetics, and long-term value.

PVC double hung windows offer a timeless aesthetic combined with advanced performance and functionality. Designed to suit both traditional and modern architecture, these windows feature two operable sashes that slide vertically, allowing for flexible ventilation from the top, bottom, or both. Engineered using premium uPVC profiles reinforced with galvanized steel, our double hung windows provide exceptional strength, durability, and resistance to warping, cracking, and corrosion. The multi-chambered frame enhances thermal insulation and energy efficiency, helping reduce heating and cooling costs in all climate zones.

Advantages of double hung window windows: Beautiful: If the opening leaf of the external casement window is too large, it is not easy to close, and the construction surface is also messy. Half of the windows on the left and right cannot be opened. In addition to the difficulty in convection of the airflow entering the room, there will also be some obstacles in the planning of some internal spaces. The high and low lifting windows are absolutely flexible in the design of height and width. The surface appears beautiful and light, the high and low window leafs can be divided by different lines, the window frame is simple, the lines are delicate, ventilation and lighting are given equal importance, and there will be no visual obstruction.