WeatherMaster™ Plus Bi-Fold Door system
Enhance Your Home with Sunspace Aluminum Bi-Fold Door Systems
A European-designed system featuring above-ground bottom running with multiple threshold options. The hardware and system components are specially engineered to provide maximum weight capacity while maintaining slim sightlines, oversized doors, and minimal profiles.
The system is easy to fabricate, and the doors can open either inward or outward using the same profiles. Both the sash and outer frame have the same depth, contributing to excellent thermal performance. This truly inline system, combined with custom hardware, delivers a high-performance, attractive, and highly desirable door solution.
Sunspace WeatherMaster™ Plus doors come standard with WeatherMaster™ Vertical 4-Track Windows, with options for single-glazed tempered glass or fully insulated thermal glass.

Technical Info
- Each panel supports up to 264.5 lbs
- Height limit: 9.8 ft
- Width limit: 3.9 ft
- Length: contact Sunspace for max dimensions
- Offers various threshold styles
- Adjustable jamb available
- Smooth bottom-glide operation
- Minimalist slim sightlines
- Choose from dual colour or special finish options
- Hidden shoot bolt lock on intermediate doors with single-point handle (key lock optional)
- Outside access can be configured as needed
- Magnetic door holders with matching handles
- Configurations up to 7 panels on either side using bottom rolling
- Same profiles for in or out opening
- Includes 30mm polyamide thermal break for superior insulation: 1.4 W/(m²·K)
- Inline setup with equal depth for sash and frame
We have taken the leap forward and combined the wall, ventilation, bug and insect protection, passage doors, Bi-Fold Doors, seasonal systems and year-round systems, and combined them into a single product that is customisable. Introducing the WeatherMaster™ Plus Bi-Fold System.
AVAILABLE COLORS

AVAILABLE TINTS

AVAILABLE TINTS


Over the years, Bi-Folding Doors have become slimmer and less noticeable. Thanks to advancements in materials, today’s frames are smaller yet still incredibly strong. Because these doors fold, they take up much less space when open, allowing you to fully open an entire wall, which is not possible with sliding patio doors. The panels neatly fold away to the edge of the frame, providing maximum visibility and convenient access to your garden.
It is always reassuring to know your home can increase in value over time, even if you are not planning to sell. This is worth considering when planning a renovation. Bi-Folding Doors complement any style of home, from traditional Victorian to modern minimalist designs. Their simplicity and practicality can transform how you enjoy your living space, brightening dark areas and creating seamless indoor-outdoor connections.
With their slim frame profile and larger glass surfaces, Bi-Folding Doors let in significantly more light than traditional doors or windows. Even when closed, they allow plenty of daylight, and when open, they create an expansive, unobstructed space. They are ideal for rooms that lack natural light or spaces where you want to spend more time.
Although they may seem delicate because they replace solid walls with glass, Bi-Folding Doors are extremely secure. They are widely used in commercial settings for this reason. Security features include multi-point locking systems, robust frames with heavy-duty hinges, and in some cases, laminated triple-glazed glass. The glass is harder to break, and the doors cannot be levered off their hinges, making break in very difficult and deterring potential intruders.
Bi-Folding Doors, especially aluminum models, are designed to handle temperature changes throughout the year without warping or bending. They are highly thermally efficient and can withstand strong winds. Despite their strength, they are easy to maintain, and a simple occasional wash and light lubrication are enough to keep them looking and working their best.
Features and Benefits
- Space-Saving Design: Opens up an entire wall while requiring minimal space when folded.
- Maximized Natural Light: Slim profiles and larger glass surfaces let more natural light flood into the room.
- Superior Security: Equipped with multi-point locks and strong frames for added safety and peace of mind.
- Customization Options: Offered in dual colors, special finishes, and various threshold configurations to match your style.
- High Performance: Provides excellent thermal insulation and features a smooth bottom-running system for effortless operation.




























