BI-FOLD DOORS

Bi-fold doors are a stylish and practical way to open up your home or business and create a seamless connection between your indoor and outdoor space. Designed with multiple panels that fold neatly to one side, bi-fold doors allow you to maximise natural light while giving you a wide, unobstructed opening to your garden, patio, or balcony.

At OM Doors & Windows LTD, we supply high-quality bi-fold doors that combine modern design, durability, and excellent energy efficiency. Our doors are manufactured using strong, long-lasting materials and fitted with high-performance glazing to help keep your property warm, secure, and comfortable all year round.

Bi-fold doors are perfect for property owners looking to enhance their living space with a sleek, contemporary look while also increasing the value and functionality of their property. Available in a range of sizes, colours, and configurations, our bi-fold doors can be customised to suit both modern and traditional spaces.

Whether you are renovating your property or working on a new build project, our team is here to help you find the perfect bi-fold door solution.

Aluminium Bi-Fold Door Opening Options

Aluminium Bi-Fold Door Opening Options

Aluminium bi-fold doors are designed to be flexible and can be configured in several different ways depending on the layout of your property and the size of the opening. Choosing the right folding configuration ensures easy access, smooth operation, and the best use of the available space.

Folding to One Side

One of the most common options is where all the panels fold and stack neatly to one side of the opening. This design creates a wide, uninterrupted opening and is ideal for those who want to fully open their living space to a garden or patio area.

Split Folding (Both Sides)

Bi-fold doors can also be configured to split from the centre, with panels folding to both the left and right sides. This option provides a balanced and symmetrical appearance and is often used for larger openings where equal access from the middle is preferred.

Traffic Door Option

Many aluminium bi-fold door systems include a traffic door, which functions like a standard door. This allows you to enter and exit without needing to fold the entire system open. It’s a practical feature for everyday use while still giving you the option of fully opening the doors when needed.

Internal or External Opening

Bi-fold doors can also be installed to fold inward or outward depending on the available space and the design of the property. Outward-opening doors are often preferred when indoor space is limited, while inward-opening doors can provide easier access from inside.

At OM Doors & Windows LTD, we supply aluminium bi-fold doors with a variety of panel and folding configurations to suit different homes and property layouts. Our team can help you choose the most practical and visually appealing option for the space.

Contact us today for expert advice and a free quote.

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CILL AND THRESHOLD OPTIONS

Cills and thresholds are essential components of a door system, designed to improve performance, weather protection, and the overall finish of an installation.

A cill is the section fitted beneath the door frame that projects outward from the building. Its main purpose is to support the frame and help direct rainwater away from the doorway, reducing the risk of water ingress. Cills are available in different widths to suit various wall depths and installation requirements, providing additional coverage and a neat external finish.

A threshold is the bottom section of the door frame that forms the point of entry between indoor and outdoor spaces. Thresholds provide structural support, help create a weather seal, and ensure a smooth transition across the doorway. Depending on the design, thresholds can be standard, low-profile, or integrated with a cill for improved drainage and accessibility.

Together, cills and thresholds play an important role in the durability, performance, and appearance of bi-fold door systems, helping to create a secure, weather-resistant, and professionally finished installation.

90MM CILL

Our 90mm bi-fold door cill is a durable aluminium threshold profile designed to provide a secure, weather-resistant base for bi-fold door systems. Engineered for strength and performance, it supports the door frame while allowing effective drainage to help prevent water ingress.

150MM CILL

Our 150mm bi-fold door cill is a robust aluminium threshold profile designed to provide a wider, secure base for bi-fold door systems. Ideal for installations requiring additional projection or enhanced weather protection, this cill delivers reliable support while helping to channel water away from the doorway.

190MM CILL

Our 190mm bi-fold door cill is a heavy-duty aluminium threshold profile designed to provide maximum coverage and support for bi-fold door systems. The extended width makes it ideal for installations requiring additional projection, improved weather protection, or greater compatibility with external finishes and cavity walls.

230MM CILL

Our 230mm bi-fold door cill is a premium aluminium threshold profile designed to provide extended coverage and superior support for bi-fold door systems. The wider projection makes it ideal for installations where additional sill depth is required, particularly for deeper wall constructions, external finishes, or improved weather protection.

STANDARD THRESHOLD NO CILL

Our standard threshold without cill is designed for bi-fold door systems where a separate cill is not required. This option provides a clean, low-profile base directly beneath the door frame, making it ideal for installations where drainage is managed externally or where the threshold is positioned within a sheltered opening.

LOW THRESHOLD NO CILL

Our low threshold without cill is designed for bi-fold door systems where a slim, unobtrusive finish is required without the addition of a separate cill. Ideal for creating a seamless transition between indoor and outdoor spaces, this option offers improved accessibility while maintaining a clean, modern appearance.

90MM CILL

The low-profile design creates a neat transition between internal and external flooring, making it ideal for residential and commercial installations. Manufactured to suit 90mm frame systems, this cill offers reliable structural support, improved weather sealing, and a clean, professional finish.

INTERGRATED CILL

Our integrated cill threshold is designed to combine the door threshold and cill into one complete aluminium profile, providing a streamlined and efficient solution for bi-fold door systems. This all-in-one design offers enhanced weather protection, effective drainage, and a clean, professional finish.

STANDARD THRESHOLD WITH CILL

A cill with standard threshold combines a projecting cill beneath the door frame with a standard-height threshold to provide reliable support, weather protection, and effective drainage for bi-fold door systems. The cill helps direct rainwater away from the doorway, while the standard threshold creates a durable and secure entry point.

This option is ideal for installations requiring a traditional threshold height, offering strong structural performance, improved weather resistance, and a neat, professional finish for both residential and commercial applications.

LOW THRESHOLD WITH CILL

A low threshold with cill combines a slim, low-profile threshold with a projecting cill to create a practical and weather-resistant base for bi-fold door systems. The low threshold provides easier access and a smoother transition between indoor and outdoor spaces, while the cill helps channel rainwater away from the doorway for improved drainage and protection against water ingress.

This combination offers a balance of accessibility, durability, and performance, making it ideal for residential and commercial installations where a clean finish and enhanced weather protection are required.