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Messy jobs. Difficult jobs.
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Zhuhai CHAMPION Curtain Wall & Doors and Windows Co., Ltd.
An innovative company dedicated to customized cross-border engineering solutions.
Guided by our core values of “Craftsmanship, Excellence, Quality & Efficiency, and Collaborative Success,” we are dedicated to advancing the field of cross-border engineering customization and becoming a leading provider of integrated cross-border engineering solutions.
HK Standard Windows & Doors
Hong Kong Standard Certified Windows & Doors
NFRC Certified Windows & Doors (USA)
CE Certified Windows & Doors (EU)
CSA Certified Windows & Doors (Canada)
AS4284 Certified Windows & Doors (Australia)
Eu Standard Fire Doors & Windows
Fire-Rated Wooden Doors
Stainless Steel Fire-Rated Doors
Stainless Steel Glass Fire-Rated Doors & Windows
Aluminum-Clad Steel Fire-Rated Doors & Windows
Steel Fire-Rated Doors & Windows
Fire-Rated Acoustic Doors & Windows
Stainless Steel, Iron & Aluminum Products
Stainless Steel Weatherproof Louvers (HOKLAS/CNAS Tested)
Stainless Steel / Galvanized Steel Cat Ladders)
Stainless Steel / Galvanized Steel / Aluminum Railings)
Stainless Steel Electrical Cabinets)
Stainless Steel Water Tanks)
Stainless Steel Wind Shields)
Stainless Steel Waste Bins)
Stainless Steel Manhole Covers)
Stainless Steel Grilles)
Aluminum Tubes / Aluminum Panels / Aluminum Louvers
Custom glass
Float Glass
Insulating Glass / Double Glazed Glass
Laminated Glass
Tempered Glass
Fritted Glass / Ceramic Frit Glass
Low-E Glass (Low-Emissivity Glass)
Bullet-Resistant Glass
Wired Glass
Fire-Rated Glass
Deeply Rooted in Hong Kong — Maintenance · Renovation · Conversion · Small-scale Engineering
Design Development
Manufacturing & Supply
Installation
One-stop Delivery
Product
HK Standard Windows & Doors
Eu Standard Fire Doors & Windows
Stainless Steel, Iron & Aluminum Products
Custom glass
Simple Four Steps
With a clear and transparent service process, we ensure a smooth experience with professional guidance and dedicated support from start to finish
Contact Us
Contact us via phone, WhatsApp, or email to share your service requirements and property details
On-Site Assessment
Arrange for qualified professionals to conduct a free on-site assessment, evaluate your existing windows, and provide expert recommendations
Quotation Confirmation
We provide a detailed and transparent quotation. Once the service scope and costs are confirmed, we will proceed with scheduling the project works
Project Completion & Handover
Our experienced team ensures efficient project completion, provides all necessary documentation and reports, and guarantees compliance with the requirements of the Buildings Department
Project Cases
Penny's Bay, Hong Kong
Facade Area: 36,000 m²
Scope of Work: Supply and installation of aluminum windows
Kai Tak Project, Hong Kong
Facade Area: 20,000 m²
Scope of Work: Aluminum Window OEM Processing
St. Paul's College, Hong Kong
Facade Area: 300 m²
Scope of Work: Supply of Aluminum Windows
F&Q
Aluminum Window Falling Accidents on the Rise: 5 Warning Signs That Your Windows May Need Major Repairs
1. Severely Rusted or Deformed Window Hinges
Window hinges are the key components that support the weight of the entire aluminum window. Due to long-term exposure to wind and rain, signs such as reddish-brown rust stains or bent stainless steel plates indicate that the structural strength of the hinges has significantly weakened.
Risk:
Rust can cause rivets to break. Once the rivets fail, the entire window sash may detach from the frame when the window is opened.
2. Loose or Broken Screws
Inspect the screws connecting the window hinges and frames. Professional installations should use stainless steel screws, while some lower-quality installations may use iron screws.
Warning Signs:
- Missing screw heads (indicating breakage)
- Screws protruding and unable to be tightened properly
Sunshine Aluminum Windows Recommendation:
Sunshine Aluminum Windows insists on using 304 stainless steel rivets and screws to ensure superior corrosion resistance and durability.
3. Sagging Window Sashes and Difficulty Opening or Closing
When closing the window, do you notice the bottom of the sash hitting the frame? Or do you need to “lift it up” with force before it can lock properly?
This is usually caused by window hinge wear, resulting in misalignment.
Consequences:
A sagging window sash continuously puts stress on the frame structure. Uneven loading over time can accelerate metal fatigue and structural deterioration.
4. Hardened or Detached Glass Sealant
Glass sealant does more than prevent water leakage — it also helps secure the glass in place.
Warning Signs:
- Cracks along the sealant edges
- Mold or black discoloration
- Sealant can be easily peeled off by hand
Related Issue:
These problems are often accompanied by serious window sill water leakage.
Sunshine Aluminum Windows uses professional-grade Dow Corning 791 structural sealant, providing long-lasting sealing performance and enhanced UV resistance.
5. Unusual Noises or Vibrations During Operation
A properly functioning aluminum window should open and close smoothly and quietly.
If you hear clicking sounds or metal scraping noises, it may indicate damage to internal components such as sliders or rivets.
Do you provide free on-site inspections?
Yes, we provide free on-site inspections and instant quotations with no hidden charges
What should I do if I receive a Mandatory Window Inspection Notification?
We provide a one-stop service, with Qualified Persons (QPs) handling the submission of supporting documents and compliance certificates to the Buildings Department
How long does the repair work usually take?
Most standard aluminum window repair or waterproofing works can be completed within one day, minimizing disruption to residents’ daily lives
What materials are used for the waterproofing works?
We use high-performance Dow Corning 791 waterproof structural sealant imported from the United States, providing enhanced flexibility, durability, and weather resistance compared with traditional cement mortar solutions
Does the project come with a maintenance service?
All projects are entitled to a complimentary 3-year upgraded maintenance package provided by Sunshine Aluminum Windows
Aluminum Window Waterproofing FAQ
Common Issues in Aluminum Window Waterproofing Works
Common issues with aluminum window waterproofing works are mainly caused by improper installation, aging materials, and external wall structural defects, resulting in rainwater infiltration through window frames, walls, or component gaps.
The following summarizes the major problems and causes by category, based on analysis from multiple professional sources.
1. Problems with Window Frame and External Wall Joints
Insufficient Cement Grouting or Hollow Gaps
During installation, insufficient filling of the inner corners or poor-quality cement mortar work may create cracks, allowing water to penetrate.
For secondary installations, fixing directly onto tiles or external finishes may allow rainwater to enter through gaps or cracks and seep behind the surface.
Aging Structural Sealant or Missing Waterproof Membrane
The sealant layer between the window frame and external wall may deteriorate over time, losing its waterproofing function. In some cases, waterproof membranes may not have been installed properly during the original construction.
Damage to External Wall Waterproofing Layer
For older buildings, damaged external wall waterproofing layers, improper window replacement procedures, or incomplete repairs after installation may result in wall dampness, mold growth, or water seepage.
2. Aging and Loosening of Window Frames and Components
Loose or Deformed Window Frames
Frequent forceful closing of windows may cause vibrations, while low-quality aluminum materials may lack sufficient structural strength. This can enlarge gaps between the frame and wall, causing mortar cracking and detachment.
Damaged Waterproof Sealant
Sealant edges exposed to weather conditions for long periods may deteriorate, loosen, or crack. Frequent opening and closing of windows can further accelerate aging, resulting in water leakage.
Improper removal of old sealant and uneven application during waterproofing repairs may also cause recurring leakage problems.
3. Drainage and Surrounding Structural Issues
Blocked Drainage Openings
Blocked drainage channels on window sills or window frames may prevent water from flowing out properly, causing overflow and leakage.
Cracked External Wall Tiles or Poor Drainage Slope
Cracks in external wall tiles, insufficient drainage slopes on window platforms, or unfinished repairs after cement works can cause water accumulation and eventual seepage.
Wall Openings or Poor Grouting Work
Small cavities around windows, poor-quality masonry work, or inadequate silicone sealing may create pathways for water infiltration.
Construction and Maintenance Considerations
Inspection Blind Spots
Many homeowners overlook critical inspection areas such as internal corner grouting, silicone sealing, and water testing during acceptance. As a result, leakage problems are often discovered only after the warranty period has expired.
Post-Repair Risks
After waterproofing repairs, issues such as wall dampness or mold growth may become more noticeable after rainfall. If repair work is not carried out carefully, leakage problems may recur.
Maintenance Recommendations
Regularly inspect window locks, drainage openings, and sealant edges. During installation, ensure proper joint filling and use high-quality weather-resistant silicone sealants to maintain long-term waterproof performance.
When should you consider carrying out waterproofing works?
If your home experiences any of the following issues, it may be time to consider a waterproofing upgrade service by Sunshine Aluminum Windows:
- Water seepage, bubbling paint, or mold growth around the window edges, top, or sides during rainy weather.
- Repeated sealant repairs (“re-caulking”) have failed to solve the problem, indicating that the existing waterproofing system may have aged and lost its effectiveness.
- For properties located on higher floors or exposed to strong wind and rain for extended periods, a comprehensive waterproofing upgrade can provide a long-term solution and reduce the need for repeated repairs.
- If you are undergoing major home renovations, upgrading the window waterproofing system at the same time can help prevent future water damage to your new interior finishes.
Waterproofing Process
- Thoroughly remove aged sealant around the window frames and glass edges, exposing a clean and stable surface for repair.
- Use an air gun to remove dust and moisture, preventing trapped water from being sealed inside the new sealant layer.
- Apply multiple layers of Dow 791 waterproof structural sealant to ensure sufficient thickness and coverage, creating a complete waterproof barrier.
- Add a transparent waterproof membrane on the outer layer as a secondary protection, enhancing water resistance and anti-stain performance.
Loose, unstable, or difficult-to-operate window hinges, with reduced load-bearing capacity (a common issue identified during Mandatory Window Inspection)
Using oxidation-resistant 304 stainless steel window hinges (available in 2.0mm / 2.5mm / 3.0mm thickness options), providing superior load-bearing strength and corrosion resistance to eliminate potential safety risks
Stiff or faulty locks, inability to secure the window properly, broken handles, and poor sealing of the window sash
Upgrade to high-quality window handles, including top-and-bottom handles, seven-shaped handles, or multi-point locking handles with lock cylinders, restoring the window’s secure sealing performance and enhancing anti-theft protection
Loose window edges and unstable connections between the aluminum window frame and the wall structure
Use oxidation-resistant 304 stainless steel window rivets for re-riveting or reinforcement, ensuring the window frame structure remains secure and stable
Air leakage, water seepage, and reduced sound insulation performance of aluminum windows
Replace the internal and external anti-oxidation, soundproofing, and waterproof sealing strips, followed by professional sealing treatment to significantly enhance the window’s waterproof and sound insulation performance
What is the Mandatory Window Inspection Scheme?
For private buildings aged 10 years or above (excluding buildings with three storeys or fewer), owners are required to appoint a Qualified Person to carry out window inspections once every five years
Core Features, Advantages, and Suitable Applications of High-Strength Pet Screens
Constructed with durable, high-strength materials, the pet screen is designed to withstand scratching from cats, dogs, and other pets. It helps significantly reduce the risk of accidental falls from windows or balconies, providing enhanced safety and peace of mind
Core Features, Advantages, and Suitable Applications of Fine Mosquito Screens
Designed with ultra-fine mesh, the screen effectively prevents mosquitoes, flies, and other small insects from entering, enhancing indoor hygiene, comfort, and overall living quality.
Hong Kong Company
Mainland Production Base (Shenzhen)
- Zhuhai CHAMPION Curtain Wall & Doors and Windows Co., Ltd.
- Address: No. 2001, Huangyang Avenue, Doumen District, Zhuhai City
- Contact Person: Mr. Zhang Tel / WeChat: 18926162668 (Same as WeChat)