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Writer's pictureJohn Armstrong

New Aluminium Bifold integrated cill


white aluminium integrated cill and outerframe
new aluminium integrated cill and outerframe

cross section drawing of aluminium bifold integrated cill
Height width sizes in mm for integrated cill outerframe


The Benefits of an Integrated Aluminium Cill and Outer Frame for Bifold Doors

Bifold doors have become increasingly popular for both residential and commercial spaces, bringing in natural light and creating seamless indoor-outdoor transitions. One of the key design components that ensures the longevity and performance of these doors is the integrated cill and outer frame. With aluminium emerging as a favorite material for these components, let’s explore why an aluminium integrated cill and outer frame can significantly elevate bifold door functionality and aesthetics.


What is an Aluminium Integrated Cill and Outer Frame?

In a bifold door system, the cill and outer frame are essential parts of the structure. The cill is the bottom section of the door frame that sits on the ground, providing a barrier against moisture, dirt, and outdoor elements. The outer frame surrounds the entire door system, providing stability, strength, and support.

An integrated aluminium cill and outer frame combines these elements into a unified structure, reducing the need for separate components and enhancing the door’s functionality and appearance. This streamlined design is increasingly favored by architects and designers due to its many benefits.


Benefits of an Aluminium Integrated Cill and Outer Frame for Bifold Doors


1. Improved Strength and Durability

  • Aluminium is known for its strength-to-weight ratio, which makes it an ideal material for bifold door frames. By integrating the cill and outer frame into one component, manufacturers enhance structural integrity, allowing the door system to withstand various environmental conditions while supporting the weight of multiple folding panels.

2. Enhanced Weatherproofing and Thermal Efficiency

  • A primary function of any cill is to prevent water ingress. When aluminium cills are integrated with the outer frame, they create a more seamless seal, reducing the likelihood of gaps where water and air could penetrate. Many manufacturers also include drainage systems within the cill to efficiently redirect water away, protecting interiors and minimizing potential moisture damage.

  • Moreover, aluminium frames can be thermally broken, creating a barrier that reduces heat transfer and improves insulation. This results in enhanced thermal performance, contributing to energy efficiency and reducing heating or cooling costs.

3. Slim, Modern Aesthetics

  • Aluminium's sleek appearance and strength allow for slim profiles, maximizing glass areas while maintaining structural support. The integrated design further simplifies and slims down the frame, resulting in a contemporary look that enhances natural light and expansive views.

  • This minimalist appeal is especially desirable for modern architectural designs, where clean lines and unobstructed visuals are key elements.

4. Easy Maintenance and Longevity

  • Aluminium is naturally corrosion-resistant and can withstand a wide range of weather conditions without rusting, rotting, or warping. Unlike traditional wooden frames, which may require regular painting and upkeep, aluminium frames require minimal maintenance and can last for decades with little wear.

  • The integration of cill and frame simplifies cleaning and reduces points of failure that would otherwise demand maintenance or repair, providing long-lasting performance with minimal upkeep.

5. Enhanced Security

  • The unified structure of an aluminium integrated cill and outer frame adds to the security of the bifold door system. Aluminium’s inherent strength makes it difficult to tamper with or break, and the integrated design eliminates gaps that intruders could potentially exploit.

  • This configuration also provides a more solid base for the installation of multipoint locking systems, further enhancing security for homes and commercial spaces alike.

Key Considerations When Choosing an Aluminium Integrated Cill and Outer Frame

Compatibility with Door System

  • Make sure the integrated cill and outer frame are compatible with the chosen bifold door system. Consult with manufacturers to ensure that the design and dimensions fit your specific requirements.

Finish and Coating

  • Aluminium frames can be powder-coated in various colors to match architectural and design preferences. High-quality finishes also add an extra layer of protection, enhancing the frame’s durability and weather resistance.

Thermal Breaks

  • For maximum energy efficiency, consider aluminium frames with thermal breaks, especially if your bifold doors will be installed in a climate with extreme temperatures.

Drainage and Sealing

  • Look for integrated cills with effective drainage systems, particularly if the bifold doors are installed in a high-rainfall area. Proper drainage channels prevent water from pooling, which is crucial for preventing moisture buildup and prolonging the door's lifespan.Our aluminium profiles are slot drained for fast and efficient drainage


For other alternative aluminum bifold threshold options please see our blog


Conclusion: Why Aluminium is the Future for Bifold Door Frames

The integration of an aluminium cill and outer frame in bifold door systems offers a streamlined, stylish solution for modern construction. From improved structural integrity and security to enhanced weatherproofing and thermal performance, these features make an aluminium integrated cill and outer frame a valuable investment in both residential and commercial spaces. As more architects and builders recognize the importance of these elements, integrated aluminium cills are likely to become the standard for bifold doors, promising durability, aesthetics, and functionality in one comprehensive design.




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