Top 10 Casement Window Manufacturers in China

Quick answer

China has a well-established door and window supply chain, covering aluminum profile processing, glass manufacturing, hardware, and complete window production. For overseas window brands, building material distributors, wholesalers, importers, contractors, and project developers, Chinese manufacturers offer options for sourcing finished windows, developing private-label products, and building long-term supply partnerships.

However, suppliers differ in product focus, manufacturing models, and cooperation terms. Some specialize in export-oriented customization and OEM/ODM production, while others focus on premium system windows and domestic brand networks. Choosing a supplier requires more than comparing company names or prices. Buyers need to confirm whether the product range, customization scope, technical documentation, and delivery arrangements match their requirements.

This guide introduces 10 Chinese window manufacturers and brands worth evaluating for casement window sourcing. It compares their product directions and potential fit for different B2B purchasing models. The list is a sourcing shortlist, not an independently audited ranking by sales volume or market share.

How We Selected the Top 10 Casement Window Manufacturers

The selection focuses on casement-window relevance, product and manufacturing scope, customization options, technical positioning, and potential suitability for international B2B purchasing. Buyers should confirm whether a supplier makes the required window type, accommodates non-standard dimensions and glazing, provides documentation for the selected configuration, and accepts the intended purchasing model-wholesale, project supply, or OEM/ODM.

The companies below have different strengths. Domestic brands can be useful references for product design and system development, while export-oriented manufacturers may be more suitable for specification-based production and overseas order coordination. Buyers should verify the manufacturing entity, product model, and cooperation terms before purchasing.

Top 10 Casement Window Manufacturers in China

1. Deslano Doors and Windows

Website: https://www.dslnwindoors.com/

Deslano is a door and window manufacturer based in Guangdong, China. Its product range includes aluminum windows and doors, uPVC windows, casement windows, sliding windows, folding systems, and other customized products. Deslano serves overseas window brands, building material distributors, wholesalers, contractors, and project customers through customized manufacturing and OEM/ODM cooperation.

Deslano can discuss product configuration according to architectural drawings, market positioning, and project requirements. This approach is relevant to buyers who need non-standard dimensions, coordinated product ranges, or repeat orders with consistent specifications.

Custom Casement Window Manufacturing

Customization can cover dimensions, frame profiles, glazing, finishes, hardware, and insect screens, subject to the selected system and confirmed order specifications. Buyers can evaluate custom single casement windows for residential and commercial projects when they need a straightforward opening configuration tailored to their dimensions.

For vinyl products, buyers can consider a custom vinyl casement window solution for distributors and OEM buyers. Projects requiring a wood-look appearance or a different material aesthetic may evaluate custom wooden-frame glass casement windows for architectural projects, subject to confirmation of exact construction and specifications.

For larger openings, the custom panoramic casement window range for project developers may be relevant. Buyers comparing flush-profile designs and insulated glazing can also review double-glazed flush casement window solutions for energy-conscious projects.

B2B Cooperation and Project Support

For brands, cooperation may focus on developing a repeatable product range, branding and packaging, and consistency between approved samples and future orders. Distributors may prioritize market-appropriate specifications and replenishment. Contractors and developers generally focus on drawing review, opening dimensions, glazing and hardware selection, installation interfaces, and delivery.

Before ordering, buyers should confirm performance documents, manufacturing specifications, warranty scope, and destination-market requirements for the selected model.

2. JBD Home

Website: https://www.jbdhome.com/

JBD Home is a Foshan-based door, window, and building-material supplier whose range includes aluminum casement windows, sliding windows, folding doors, and other aluminum systems.

Aluminum Casement Windows and Project Configurations

Its product range includes inward- and outward-opening options, fixed-and-opening combinations, and thermal-break aluminum systems. Some configurations use insulated glazing, including Low-E options, depending on the selected model. Buyers sourcing several window types can evaluate JBD Home as a multi-product aluminum window supplier.

Suitable Buyers

JBD Home may be relevant to importers, distributors, and project buyers looking for aluminum window choices and coordinated product supply. Confirm the specific model, glass, hardware, frame, OEM availability, order quantities, lead time, and delivery terms.

3. Hotian Windows

Website: https://hotianwindows.com/

Hotian is a Chinese window and door manufacturer and exporter offering aluminum, uPVC, and wood windows. Its casement window range spans different materials and applications, with customization options such as dimensions, colors, opening styles, and hardware configurations.

Multi-Material Window Manufacturing

Hotian's product mix is useful for buyers comparing several frame materials through one supplier. Its range includes double-casement configurations and glazing options for different building styles. Each material system should be evaluated independently because thermal performance, maintenance, hardware, and cost differ by construction.

OEM and Private-Label Cooperation

Hotian offers OEM and private-label options, potentially covering specifications, colors, hardware, branding, and packaging. Confirm which services apply to the quoted product, along with MOQ, lead time, warranty coverage, and after-sales responsibilities.

4. Doorwin Group

Website: https://doorwingroup.com/

Doorwin Group supplies customized windows and doors for residential and commercial buildings. Its portfolio includes aluminum, wood, wood-aluminum composite, and other architectural window systems. Wood-aluminum construction is a distinctive direction to investigate for higher-end projects.

Wood-Aluminum Casement Window Systems

Its range includes aluminum casement windows, wood-aluminum composite windows, and customized architectural configurations. Wood-aluminum systems combine interior wood surfaces with exterior aluminum protection, creating a different appearance and maintenance profile from standard aluminum windows. These products may suit villas, premium residences, and projects where interior material aesthetics matter.

Customization and Export Projects

Doorwin offers customization across dimensions, colors, glazing, and hardware, alongside export-oriented project support. Buyers should identify whether the quoted system is all-aluminum, timber, or wood-aluminum composite, then compare equivalent specifications. For projects, confirm treatment where applicable, glazing, sealing, performance testing, packaging, and warranty.

5. LEAWOD Windows & Doors

Website: https://www.leawod.com/

LEAWOD is a Chinese window and door company focused on research, manufacturing, sales, and service. Its range includes aluminum system windows, wood-aluminum composite windows, aluminum-clad wood windows, and customized architectural systems. The brand emphasizes system design and premium customization.

High-End Window Systems and Material Options

LEAWOD's aluminum system windows focus on integrated system design, while wood-aluminum and aluminum-clad wood products target projects that place greater emphasis on material aesthetics and interior design. It is worth evaluating for premium residences, villas, and design-led buildings.

What Overseas Buyers Should Consider

Overseas buyers should confirm the exact product series, sales model, export availability, and customization scope. A strong domestic brand does not automatically mean every product line is available for overseas OEM or wholesale purchasing. Verify the manufacturing entity, technical documents, supply terms, and repeat-order consistency.

6. DERCHI Window and Door

Website: https://www.derchiwindow.com/

DERCHI is a Guangdong-based window and door manufacturer offering aluminum casement windows, sliding windows, top-hung windows, tilt-and-turn windows, and other customized systems. Its business includes product development, manufacturing, project coordination, and service for different markets.

Aluminum Window Systems and Custom Projects

DERCHI's range covers multiple opening styles and building applications, making it relevant to buyers sourcing several aluminum window types for a residential or commercial project. Select the appropriate system according to opening dimensions, operation, and destination-market requirements.

Procurement Considerations

Verify the selected model's profile design, hardware, glazing, and test documentation. For overseas orders, confirm export cooperation terms, MOQ, production lead time, warranty coverage, and spare-parts availability.

7. ORM Windows

Website: https://www.ormwindows.com/

ORM Windows supplies aluminum architectural window systems, including casement, sliding, top-hung, fixed, tilt-and-turn, and thermal-break aluminum windows.

Thermal-Break Aluminum Casement Windows

Thermal-break aluminum casement windows are relevant to projects assessing whole-window thermal performance. The thermal break reduces heat transfer through the aluminum frame, but the final result depends on the complete construction. Buyers should confirm the profile, thermal break, glazing, sealing, and whole-window test results rather than infer performance from the term "thermal break" alone.

Custom Architectural Applications

ORM can be evaluated for customized aluminum window systems. Contractors should confirm its ability to meet project dimensions and glazing requirements; distributors should check standard configurations, MOQ, export packaging, and repeat-order consistency.

8. VELTOR

Website: https://www.veltorwindow.com/

VELTOR supplies customized aluminum window systems, including casement, top-hung, tilt-and-turn, and sliding windows. Its business emphasizes configuring products according to customer drawings, climate conditions, and applicable local building requirements, with OEM and private-label options available for evaluation.

Drawing-Based Custom Manufacturing

VELTOR is relevant to buyers who need non-standard dimensions, specified colors, or particular glazing configurations. For contractors and developers, drawing review helps establish frame dimensions, opening style, installation interfaces, and product configuration before production.

OEM and Private-Label Options

Brands and distributors can investigate its OEM and customized supply arrangements. Clarify customization scope, sample and drawing approval, production schedule, acceptance criteria, and whether test reports cover the final selected configuration.

9. PAIYA Windows & Doors

Website: https://www.paiya.com/

PAIYA is a Chinese window and door brand focused on premium aluminum system windows and doors. Its range includes casement windows, sliding windows, doors, folding doors, and sunrooms. The company emphasizes product development, system-window design, and brand distribution.

Premium Aluminum Window Design

PAIYA's casement windows target residential buyers who value architectural appearance, comfort, and coordinated window systems. Its product portfolio provides a reference for premium window design, series development, and brand positioning.

Distribution and Cooperation Considerations

PAIYA has a strong domestic brand and distribution orientation. Overseas buyers should confirm whether international wholesale, OEM/ODM, or project purchasing is available for the relevant product line rather than assuming all private-label arrangements are accepted.

10. PHONPA Windows & Doors

Website: https://www.phonpa.com/

PHONPA is a Chinese window and door brand focused on premium customized products. Its range includes casement windows, sliding windows, doors, and sunrooms. The brand emphasizes sound insulation, comfort, product design, and system-window solutions.

Sound-Insulation-Oriented Window Systems

PHONPA's casement window offering includes outward-opening configurations, and its brand positioning emphasizes acoustic insulation and sealing. This direction is relevant to residences near busy roads or other noise sources. Actual sound insulation depends on glazing, frame and sash sealing, installation, and surrounding wall construction. Buyers should request test evidence for the selected model.

Brand and Market Positioning

PHONPA is useful for studying premium window positioning, sound-insulation-oriented products, and coordinated window collections. Overseas buyers should verify export supply and OEM arrangements before treating it as a direct private-label supplier.

Casement Window Manufacturers in China: Comparison Table

The companies have different product and business models. This table helps buyers narrow down initial research; it is not a definitive quality ranking.

This is an initial sourcing aid. Buyers should confirm each supplier's manufacturing entity, product specifications, export cooperation model, and technical documentation before requesting a formal quotation.

How to Choose a Reliable Casement Window Manufacturer

Manufacturing Capability and Quality Control

Assess manufacturing capability against the actual product. A company that makes standard casement windows may not automatically be equipped for every large-format, special-structure, or high-performance project. Ask about profile processing, frame and sash assembly, glass installation, hardware fitting, and final inspection. Approve final drawings before mass production and establish acceptance criteria.

Frame Profiles, Thermal Breaks and Glazing

Thermal performance depends on the complete system: frame profile, thermal break, glazing, frame-to-sash interface, and sealing. Select the profile and glass according to the target climate and building requirements. For high-performance projects, request whole-window thermal transmittance values and supporting test documentation.

Hardware, Sealing and Opening Performance

Confirm opening direction, hardware configuration, locking points, gasket materials, drainage, and maintenance requirements. For large or heavy sashes, check that the hardware is suitable for the sash weight and that the supplier has stated operating limitations.

Certifications and Product Testing

Requirements depend on destination market, product design, and configuration. Verify that certificates, declarations, and test reports cover the model being purchased. European, US, Australian, and other markets may require different performance testing or compliance documentation. A company management-system certificate does not replace product-specific performance testing.

Export and After-Sales Support

For overseas purchasing, packaging, shipping, spare parts, warranty, and after-sales arrangements matter. Brands and distributors should prioritize supply continuity and specification consistency, while project buyers should clarify responsibilities for drawing approval, installation coordination, and final acceptance.

Which Casement Window Supplier Is Right for Your Business?

For Window Brands and OEM Buyers

Brands should focus on product development, customization scope, branding, packaging, and consistency across repeat orders. Confirm delivery capability through samples, drawing approval, and documented quality-acceptance criteria.

For Distributors, Wholesalers and Importers

Assess product range, MOQ, quotation structure, lead time, packaging, and spare-parts availability. For long-term resale, clear specifications and repeatable supply are usually more valuable than a low price on a single order.

For Contractors and Project Developers

Start with architectural drawings, opening dimensions, exposure conditions, and destination-market requirements. Confirm the window type, frame material, glazing, hardware, installation interfaces, and performance documentation. For multi-product projects, align finishes and technical requirements across the schedule.

Custom Casement Window Specifications: What Should Buyers Compare?

Customization involves more than changing dimensions and colors. Buyers should consider how the frame material, glazing, hardware, and construction work together.

Frame Material and Profile Design

Choose the frame material, such as aluminum or uPVC, and verify profile sections, wall thickness, thermal-break design, and finish. For non-standard projects, request the relevant section drawings and dimension approvals.

Glass Configuration

Choose glazing according to thermal, acoustic, safety, and budget requirements. Insulated glass, laminated glass, and Low-E glass may suit different applications, but the final selection should be checked against project requirements and whole-window performance evidence.

Hardware and Opening Configuration

Specify inward or outward opening, sash combinations, locking method, insect screens, and maintenance access. For large sashes, confirm hardware load capacity and operating limits.

Finish, Color and Branding

Colors, wood-grain finishes, and brand marks affect appearance and market positioning. For OEM projects, approve finish samples and specify logo placement, packaging, and the sample-to-production approval process.

Casement Window Prices in China: What Affects the Cost?

Casement window prices depend on materials, construction, glazing, hardware, customization, and order conditions. Profile design affects material and processing costs. Glass type and thickness affect glass cost and sash weight, while hardware, sealing, and special features influence the final quotation.

Non-standard sizes, special finishes, additional engineering, and performance testing may increase development or production costs. Order quantity, packaging, transportation, and destination requirements should also be included in the procurement budget.

Compare quotations only after aligning specifications. Check dimensions, profiles, glass, hardware, finish, packaging, and delivery terms first. Then compare prices alongside warranty conditions, test documents, and after-sales responsibilities.

Common Mistakes When Sourcing Casement Windows from China

Comparing Prices Without Matching Specifications

Differences in profiles, glazing, hardware, and sealing can lead to significant price variations. Standardize the technical specification before comparing supplier quotations.

Ignoring Target Market Requirements

Different countries and regions have different window-performance and documentation requirements. Identify destination-market requirements before ordering and confirm that the supplier can provide the relevant product and documents.

Approving Production Without Final Drawings

Dimensions, opening direction, installation interfaces, and glazing should be confirmed before production. Starting mass production without approved drawings can cause rework, installation problems, and additional costs.

Overlooking Spare Parts and Warranty Terms

Clarify warranty scope, spare-parts supply, and fault-handling procedures. Long-term cooperation also requires specification consistency and component compatibility across future orders.

What Information Is Needed for a Custom Casement Window Quote?

To obtain an accurate quotation, provide window dimensions, quantities, architectural drawings or site photographs, project location, and intended application. Specify the frame material, profile requirements, glazing, finish, opening direction, hardware, and insect screens. If the project has defined air, water, wind-load, or thermal-performance targets, include them.

OEM/ODM enquiries should include branding, packaging, expected order quantity, and repeat-order plans. Project enquiries should identify installation conditions, applicable standards, delivery expectations, and required documentation. If complete drawings are not available, start with preliminary dimensions, quantities, and application details.

Why Choose Deslano for Custom Casement Windows?

For overseas brands, distributors, and project buyers, the right manufacturer should do more than supply a window. It should coordinate specifications, discuss customization, and manage order requirements from drawing review through production and delivery.

Deslano serves overseas markets with customized window and door products and OEM/ODM cooperation. Casement window enquiries can cover opening style, dimensions, frame material, glazing, hardware, and finishes, with the final configuration established according to drawings and destination-market requirements.

For brands and distributors, the focus may be product-series customization, consistent specifications, and long-term supply. For contractors and developers, priorities may include drawing coordination, installation interfaces, performance requirements, and delivery arrangements.

Provide your dimensions, quantities, drawings, and target market so Deslano can assess the required configuration and manufacturing scope.

Frequently Asked Questions

1. Who are the leading casement window manufacturers in China?

The right manufacturer depends on material, system design, customization needs, and destination market. Compare product information, manufacturing capability, technical documents, and quotation terms rather than relying only on list rankings.

2. Can Chinese manufacturers provide OEM casement windows?

Some Chinese manufacturers offer OEM/ODM services covering dimensions, materials, glazing, hardware, finishes, branding, and packaging. Confirm the available scope and minimum order quantity with the specific supplier.

3. What materials are available for custom casement windows?

Common options include aluminum, uPVC, wood, and wood-aluminum composite systems. They differ in construction, thermal performance, maintenance, and cost, so selection should match the project and target market.

4. How do I compare casement window quotations?

Align dimensions, materials, glazing, hardware, finishes, packaging, and delivery terms before comparing prices. Also verify warranty conditions, test documents, and after-sales responsibilities.

5. What certifications should I check before importing casement windows?

Identify the standards and documentation applicable to the destination market and product model. Verify the issuing body, coverage, validity, and whether the documents apply to the configuration being purchased.

6. What information is needed to request a custom casement window quotation?

Provide dimensions, quantities, drawings, frame material, glazing, hardware, opening direction, finish, project location, and delivery requirements. More complete information helps the supplier assess the configuration and prepare a more accurate quotation.

Get a Custom Casement Window Solution from Deslano

Are you looking for a reliable casement window manufacturer in China for your brand, distribution business, or construction project?

Deslano provides customized window manufacturing and OEM/ODM cooperation for overseas buyers. Share your drawings, dimensions, quantities, and target-market requirements with our team to discuss suitable product configurations and project-specific solutions.

Contact Deslano to discuss your custom casement window requirements and request a quotation.