Stellar Aluminium Slimline Bi-fold Door - Aluminium Slimline Bi-fold Door
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A slimline aluminium bifold door system offering wide openings, contemporary styling, and outstanding thermal and security performance—ideal for high-end residential and commercial projects.
Application
The Stellar Slimline Bifold Door is suitable for a wide range of architectural applications where large glazed openings, contemporary aesthetics, and smooth folding operation are essential. Its ultra-slim aluminium profiles, robust construction, and flexible configurations make it ideal for both residential and commercial environments.
High-End Residential Developments
Perfect for luxury homes and architect-designed properties, the Stellar Slimline Bifold Door creates seamless transitions between indoor and outdoor spaces. Its slim sightlines and flush detailing enhance modern façades while delivering excellent thermal performance.
Luxury Apartments and Garden Rooms
In multi-residential buildings and garden extensions, the system offers a secure and elegant solution for terrace and patio access. Its folding mechanism allows for wide openings without compromising space or usability.
Commercial Offices and Hospitality Venues
For restaurants, cafés, and office spaces, the system delivers a sleek, high-specification solution that maximises natural light and enables flexible use of interior and exterior areas.
Public Sector Buildings with Outdoor Access
In schools, healthcare facilities, and civic buildings, the Stellar Slimline Bifold Door provides robust performance and low maintenance. Its accessibility options and secure locking systems support inclusive design and safety.
Refurbishment and Retrofit Projects
The system is ideal for upgrading older properties, replacing outdated doors with a modern, energy-efficient alternative. Its flexible sizing and contemporary styling allow it to integrate with a variety of building types.
Contemporary New-Build Schemes
For modern developments and regeneration projects, the Stellar Slimline Bifold Door offers a premium aluminium solution that meets both aesthetic and performance requirements. Its wide configuration options support creative design flexibility.
Description
A Premium Aluminium Bifold Door System for Seamless Indoor-Outdoor Living
The Stellar Slimline Bifold Door is a high-performance aluminium system designed to deliver expansive openings, smooth folding operation, and exceptional thermal and security performance. Ideal for residential, commercial, and mixed-use developments, it combines architectural elegance with robust functionality.
Manufactured by Epwin Window Systems, the system is part of the award-winning Stellar aluminium range and is engineered for strength, durability, and ease of installation—making it suitable for both new-build and refurbishment projects.
Design & Aesthetic Excellence
The Stellar Slimline Bifold Door features ultra-slim aluminium profiles and large glazed areas to maximise natural light and views. Its minimalist styling and flush detailing make it ideal for contemporary architecture.
- Slim 120 mm meeting stile for maximised glass area
- Flush sash and outer frame for clean, modern aesthetics
- Available in multiple configurations up to 7 panes
- Wide range of powder-coated finishes, including dual-colour options
- Concealed hardware and smooth glide operation
- Low threshold options for seamless transitions
This design flexibility allows the system to complement high-end residential and commercial schemes.
Thermal Performance & Energy Efficiency
The system is designed to meet and exceed the latest energy efficiency standards, helping to reduce heat loss and improve occupant comfort in all building types.
- U-values as low as 1.1 W/m²K with triple glazing
- Thermally broken aluminium profiles
- Glazing options: 28 mm double glazing or 44 mm triple glazing
- High-performance weather seals and thermal breaks
- Supports compliance with Approved Document L
These features contribute to lower energy consumption and enhanced sustainability.
Security & Compliance
The Stellar Slimline Bifold Door is engineered to meet stringent security standards, making it suitable for residential and commercial applications where safety is essential.
- PAS 24:2016 certified
- Secured by Design compliant
- Multi-point locking system with shootbolts and anti-lift features
- Internally glazed for added security
- Compliant with Approved Documents Q (Security), L (Thermal), and M (Access)
This ensures peace of mind for occupants and full compliance with UK Building Regulations.
Durability & Low Maintenance
Constructed from high-grade aluminium, the Stellar Slimline Bifold Door offers long-term durability with minimal maintenance. Its powder-coated finish is weather-resistant and colour-stable.
- Durable, corrosion-resistant aluminium construction
- Low-maintenance powder-coated finish
- Long service life with minimal upkeep
- Backed by manufacturer warranties
This makes it ideal for exposed locations and high-traffic environments.
Construction & Configuration
- Aluminium bifold door system
- Up to 7-pane configurations
- 70 mm outer frame depth
- Internally glazed as standard
- Flush sash and frame design
- Low threshold options for accessibility
- Smooth folding hardware with stainless steel tracks
This modular design allows the system to be tailored to a wide range of project requirements.
Sustainability
The Stellar Slimline Bifold Door supports sustainable construction through responsible sourcing, recyclability, and energy-efficient performance.
- 100% recyclable aluminium profiles
- Manufactured in the UK to ISO 14001 environmental standards
- Supports BREEAM and other sustainability targets
- Long lifespan and low environmental impact
Applications
The Stellar Slimline Bifold Door is suitable for:
- High-end residential developments
- Luxury apartments and garden rooms
- Commercial offices and hospitality venues
- Public sector buildings with outdoor access
- Refurbishment and retrofit projects
- Contemporary new-build schemes
Digital Specification Support
To support digital workflows and specification platforms, the Stellar Slimline Bifold Door is available with:
- NBS Chorus-compatible specification data
- BIM object availability (Revit, IFC, DWG)
- COBie-compliant data
- Full technical documentation including datasheets, test reports, and installation guides
Why Specify the Stellar Slimline Bifold Door?
- Premium aluminium bifold system with ultra-slim sightlines
- U-values as low as 1.1 W/m²K
- PAS 24 and Secured by Design compliant
- Available in up to 7-pane configurations
- Flush sash and frame for modern aesthetics
- Wide range of powder-coated finishes
- Durable, low-maintenance aluminium construction
- Backed by Epwin’s technical support and warranties
General information
Color | White Grey Black Brown |
Material | Aluminium |
Shape | Rectangle |
Length | Bespoke |
Width | Bespoke Guidance for specification option: Sash size 3000 mm maximum. Overall width 6500 mm maximum. |
Height | Bespoke Guidance for specification option: Sash size 2600 mm maximum. |
Warranty description | Ten year Guidance for specification option: 10-year mechanical performance and hardware guarantee. 25 year Guidance for specification option: 25-year surface finish guarantee. Lifetime Guidance for specification option: Lifetime security guarantee on Yale hardware. |
Uniclass | |
CAWS | L20/55 Doorsets L20/480 Doorsets |
Product range |
Specification data - Sliding door and partition sets
Classification data | |
Arrangement | Bi-parting opening, left. Bi-parting opening, right. Both sides stacking. Manufacturer guidanceUp to 7 sashes with maximum width of 6500 mm. Consult manufacturer for details and insert requirements. |
Track system | Stainless steel. |
Door leaves | |
Construction | Aluminium. |
Finish and colour | Anthracite Grey Flat/ Matt RAL 7016. Guidance for specification option: Stock colour. Anthracite Grey/ Signal White Flat/ Matt RAL 7016 / 9003. Guidance for specification option: Stock colour. Jet Black Flat/ Matt RAL 9005. Guidance for specification option: Stock colour. Jet Black/ Signal White Flat/ Matt RAL 9005 / 9003. Guidance for specification option: Stock colour. Signal White Flat/ Matt RAL 9003. Guidance for specification option: Stock colour. Agate Grey Flat/Matt RAL 7038. Guidance for specification option: Available upon request. Anthracite Grey Textured RAL 7016. Guidance for specification option: Available upon request. Chocolate Brown Flat/Matt RAL 8017. Guidance for specification option: Available upon request. CreamFlat/MattRAL 9001. Guidance for specification option: Available upon request. Slate Grey Flat/Matt RAL 7015. Guidance for specification option: Available upon request. |
Operation | Manual. |
Hardware | Multipoint locking and intermediate shootbolts, lockable handles. Yale 3-star cylinder (PAS 24). |
Wind load resistance | 1200 Pa. |
Air permeability | 300 Pa. |
Watertightness | Class 5A (250 Pa). |
Minimum requirement | Class B3 (PAS 24). |
Type | Double glazed. Triple glazed. Manufacturer guidanceGlazing options 28 mm, 36 mm or 44 mm. |
Interlocking frame profile | 50 mm. 68 mm. 96 mm. |
U-value | 1.0 W/m²K (triple glazing); 1.4 W/m²K (double glazing). Guidance for specification option: Best performance figures, tested and approved by UKAS. Consult manufacturer to provide calculations on accurate weather performance based on your specific requirements. |
Sill | 100 mm. 150 mm. 200 mm. |
Bead | 28 mm. 36 mm. 44 mm. |
Sustainability data
Country of product manufacture | United Kingdom |
Manufacturing plant location | |
Material | Aluminium |
Recycled contentAs defined in clause 7.8 of BS EN ISO 14021 | 100 % |
Expected Life | 60 year |
Literature
Stellar Window and Door range
Stellar Window & Door features
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