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Turn entire walls into wide, open passages. Folding glass door systems stack neatly to the side, giving you a full-width opening when you want the outdoors, and complete protection when you don’t.

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Bi-Fold Glass Window & Door

Turn entire walls into wide, open passages. Folding glass door systems stack neatly to the side, giving you a full-width opening when you want the outdoors and complete protection when you do not.

IMPERGO

What Is a Folding Glass Door System?

Folding glass door systems, also known as bi-fold or folding sliding systems, use multiple connected glass panels that slide and fold along a track. Instead of overlapping like traditional sliding doors, the panels move together and stack neatly to one side, opening up nearly the full width of the space.

This makes them a clean and space-saving solution for modern architecture. When closed, they create a sleek glass facade. When opened, the boundary between inside and outside nearly disappears, making the space feel more open and connected.

They are ideal for spaces that need to shift quickly between a protected indoor setting and an open-air terrace. Folding glass doors also maximize the opening width, keep panels stacked neatly to the side, and create a smooth connection between interior and exterior areas.

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Why Choose Folding Glass Door Systems?

Full-Width Openings

Clear almost the entire opening and transform a closed facade into one large, open passage—perfect for terraces, restaurants, and event spaces.

Flexible, Space-Efficient Design

Panels fold and park compactly to the side, giving you maximum usable area inside and out.

4-Season Comfort & Insulation

Heat-insulated glass and well-designed seals help maintain indoor temperature in cold weather and reduce solar impact in hot weather, supporting year-round use.

Noise & Weather Protection

When closed, folding glass systems help reduce outside noise and shield against wind, rain, and other weather conditions.

Safety & Durability

Aluminium construction and tempered/insulated glass deliver long-term protection and structural stability in demanding environments.

Architectural Elegance

Aluminium folding systems act as a strong design element, increasing both the elegance and functionality of outdoor spaces while maintaining a modern, minimal appearance.
Full-Width Openings
Flexible, Space-Efficient Design
4-Season Comfort & Insulation
Noise & Weather Protection
Safety & Durability
Architectural Elegance

Material Quality & Design Options

Folding glass systems are engineered to perform—and to look like a natural extension of your architecture.

Combined, these elements create folding systems that are both technical solutions and design features, enhancing the overall character of your space.

Aluminium Frames

Aluminium Frames

01

Aluminium Frames

  • High-grade aluminium for slim yet strong profiles

  • Resistant to weather conditions, deformation, and corrosion

  • Suitable for both residential and commercial projects

Colors & Finishes

Colors & Finishes

02

Colors & Finishes

  • Full RAL color range available

  • Electrostatic powder-coated surfaces for long-lasting color and protection

  • Matte, metallic, and wood-effect finishes to complement pergolas, windows, and facades

Glass Options

Glass Options

03

Glass Options

  • Standard 4+12+4 mm insulating glass in Adorado Series

  • Possibility for different glass types (clear, tinted, solar-control) depending on exposure and design

  • Safety-focused glass setups (tempered and/or laminated) tailored to project needs

01

Aluminium Frames

Aluminium Frames
  • High-grade aluminium for slim yet strong profiles

  • Resistant to weather conditions, deformation, and corrosion

  • Suitable for both residential and commercial projects

02

Colors & Finishes

Colors & Finishes
  • Full RAL color range available

  • Electrostatic powder-coated surfaces for long-lasting color and protection

  • Matte, metallic, and wood-effect finishes to complement pergolas, windows, and facades

03

Glass Options

Glass Options
  • Standard 4+12+4 mm insulating glass in Adorado Series

  • Possibility for different glass types (clear, tinted, solar-control) depending on exposure and design

  • Safety-focused glass setups (tempered and/or laminated) tailored to project needs

Folding Glass Door Styles & Configurations

Each project demands its own configuration. Folding glass door systems can be tailored to your opening size, direction of travel, and circulation.

Preview
01

By Layout & Opening Direction

Single-Side StackAll panels fold and stack to one side, keeping the opposite side visually clean. Split Stack (Left & Right)Panels divide toward both sides, keeping a centered view or entrance clear. With Everyday “Traffic Door”One leaf can act as a regular hinged door for daily access, so you don’t need to fold the entire system each time.
02

By Application

Full-Height Folding DoorsFloor-to-ceiling glass used as a main facade on terraces, gardens, and pool decks. Folding Window SystemsHalf-height or counter-height openings for kitchens, cafés, and bars where serving and ventilation are important. Pergola & Glass Room FrontsFolding doors installed between posts to create 3-sided pergola rooms or to close sun rooms and winter gardens.
03

By Threshold Type

Weather-Resistant ThresholdFor exterior applications where water and air tightness are priorities. Low / Flush ThresholdFor interior or semi-interior transitions where a low step and easy access are essential.
01

By Layout & Opening Direction

  • Single-Side Stack
    All panels fold and stack to one side, keeping the opposite side visually clean.

  • Split Stack (Left & Right)
    Panels divide toward both sides, keeping a centered view or entrance clear.

  • With Everyday “Traffic Door”
    One leaf can act as a regular hinged door for daily access, so you don’t need to fold the entire system each time.

By Layout & Opening Direction
02

By Application

  • Full-Height Folding Doors
    Floor-to-ceiling glass used as a main facade on terraces, gardens, and pool decks.

  • Folding Window Systems
    Half-height or counter-height openings for kitchens, cafés, and bars where serving and ventilation are important.

  • Pergola & Glass Room Fronts
    Folding doors installed between posts to create 3-sided pergola rooms or to close sun rooms and winter gardens.

By Application
03

By Threshold Type

  • Weather-Resistant Threshold
    For exterior applications where water and air tightness are priorities.

  • Low / Flush Threshold
    For interior or semi-interior transitions where a low step and easy access are essential.

By Threshold Type

Choose Between Thermopane vs Double-Glazed Glass Options

Thermopane and double-glazed sliding systems both use two panes, but performance depends on how they’re built. Thermopane uses a sealed IGU for stronger insulation and noise control, while double-pane systems can still insulate well when glass thickness, spacer depth, sealing, and track installation are done with tight tolerances.

Main
Thermopane Glass (Insulated)
Double-Glazed Glass (Two-Pane)
01.

Thermopane Glass (Insulated)

Thermopane Glass (Insulated)

Thermopane sliding systems use an insulated glass unit (IGU) to deliver stronger comfort and noise control, making them ideal for exterior openings, pergola enclosures, and four-season spaces. With a double-glazed IGU and tempered glass on both sides, you get more effective insulation to help retain warmth in winter and limit heat gain in summer, added security from reinforced glazing, and better energy efficiency by reducing heat transfer through the opening.

02.

Double-Glazed Glass (Two-Pane)

Double-Glazed Glass (Two-Pane)

Double-pane sliding systems use two layers of glass to deliver solid insulation and a more protected feel compared to single glazing. Overall performance depends on the exact build - glass thickness, spacer depth, sealing quality, and the precision of frame and track installation - because tighter tolerances and better sealing translate directly into better comfort and long-term reliability.

Why Choose Folding Glass Door Systems?

Technical Specifications

Folding sliding systems are developed with high-quality materials and user-friendly engineering to ensure years of reliable use and smooth operation.

 

DETAILS
01

Dimensions & Panels

02

Glass & Insulation

03

Frame & Profiles

04

Operation

05

Sealing & Maintenance

06

Warranty

01

Dimensions & Panels

Maximum system height: up to 2,500 mm. Each wing consists of 2 glass panels. System composed of multiple wings with self-lever mechanisms. Maximum recommended width per glass panel: 800 mm.

02

Glass & Insulation

4+12+4 mm tempered insulating glass. Thermal insulation achieved through insulating glass configuration. Tempered safety glass for improved security and durability.

03

Frame & Profiles

Frame profile size: 58 × 77 × 1.5 mm (approx). Aluminium profiles with electrostatic powder coating finish.

04

Operation

Each wing uses 4 aluminium-bodied wheels. Independent movement (right/left). Outward folding movement to save interior space.

05

Sealing & Maintenance

Rubber seals for water and air insulation. Design allows easier disassembly for glass repair or replacement.

06

Warranty

System covered by a 2-year warranty (structure and finish).

Maximum system height: up to 2,500 mm. Each wing consists of 2 glass panels. System composed of multiple wings with self-lever mechanisms. Maximum recommended width per glass panel: 800 mm.

4+12+4 mm tempered insulating glass. Thermal insulation achieved through insulating glass configuration. Tempered safety glass for improved security and durability.

Frame profile size: 58 × 77 × 1.5 mm (approx). Aluminium profiles with electrostatic powder coating finish.

Each wing uses 4 aluminium-bodied wheels. Independent movement (right/left). Outward folding movement to save interior space.

Rubber seals for water and air insulation. Design allows easier disassembly for glass repair or replacement.

System covered by a 2-year warranty (structure and finish).

Folding Glass Door Sysstems FAQ

They can be used in homes, workplaces, cafés, restaurants, hotels, pergolas, winter gardens, terraces, and balconies—anywhere you need a wide-opening, flexible glass facade.

Sliding systems move panels behind each other along parallel tracks, which is ideal for large glass surfaces and partial openings. Folding systems move and stack the panels to the side, allowing you to open almost the entire span of the opening.

Yes. With insulating glass, aluminium frames, rubber seals, and proper thresholds, folding systems help maintain indoor temperature and provide protection against wind, rain, and noise.

In many cases, yes. We assess the existing structure and dimensions, then propose a folding system that fits or suggest adjustments to the opening to accommodate the system.

Regular cleaning of glass and frames, keeping tracks free of dust and debris, and periodic checks of hinges, wheels, and seals. With simple, routine care, folding systems offer years of smooth operation and reliable performance.

Ready to Elevate Your Outdoor Experience?

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