257 Integrated Cornerless Folding Window

Without a corner post to interrupt the view you can enjoy the vistas beyond with the Centor 257 Integrated Cornerless Folding Window. Designed with the same clean lines as our flagship 205 Integrated Folding Door, homeowners will enjoy even more fresh air and views, with each side of the opening capable of spanning up to 4.7m wide.

The Cornerless Folding Window can have 2, 3, 4 or 5 panels on each side, in ‘odd-odd’ configurations (e.g. 3 doors on the left, 5 doors on the right) or ‘odd-even’ configurations (e.g. 3 doors on the left, 4 doors on the right).

For inside-outside living without the compromises, the 257 Integrated Cornerless Folding Window incorporates a choice of either built-in screens or shades to control insects, sunlight and privacy. Our shades also enhance the thermal properties of the window, with independent tests showing that the blackout shade improves the U-factor by 17% when drawn across the opening.

  • Wood interior in five unfinished options or primed for painting.
  • Aluminum exterior in a range of standard or custom colors.
  • Engineered to last a lifetime – extrusions are painted after cutting and machining so all surfaces are coated, reducing the probability of filiform corrosion. 
  • Hidden hardware, including Access AutoLatch™, AutoLatch™ and concealed hinge.
  • Integrated insect screens and shades are accessible for service or replacement. 
  • Screen box facings are available to enable simple installation into an existing opening. 
  • Double or triple glazing available.
Overall frame width
4' 6" – 15' 9 ⅞" (1373 – 4822mm)
Visible frame width
4' 1 ¾" – 15' 5 ½" (1263 – 4712mm)
Frame height
6' 6 ¼" – 9’ 5 ½” (1987 – 2884mm)
Panel width
1' 10 ⅝" – 3’ 3 ⅜” (575 – 1000mm)
Panel height
6' ⅝" – 9’ (1846 – 2743mm)

*257 Cornerless Folding Window available with the choice of either a screen or shade

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Access AutoLatch™

Centor’s latest locking innovation, the Access AutoLatch™ is available on doors that are Florida hurricane rated. It replaces the traditional entrance handle with a concealed version that’s hidden from view in the door stile.

Centor Access AutoLatch
The lever is simply lifted to open the doors from the inside. A ‘signifier’ on the face of the panel hints at the lever’s location.
access autolatch exterior handle
On the exterior, a slimline vertical pull-handle allows panels to be opened with ease.

The Centor AutoLatch™ is used to close and secure intermediate panels in one movement, with one hand. It is available keyed or non-keyed.

Centor AutoLatch for easily opening intermediate panels on folding doors
Centor AutoLatch™
Concealed hinge

The concealed hinge on our folding doors is hidden from sight within the edge of the door. Not only does it look great, but it also makes the doors tamper-proof for additional security.

Folding door hinge is hidden from sight within the edge of the door
Folding door hinge is hidden from sight within the edge of the door
Integrated screens and shades

Centor offers the best retractable fly screens for bifold doors, accompanied by innovative shades that are built into the frame. Available on our 200 and 400 Series doors and windows, this unique offering allows homeowners to enjoy inside-outside living without the traditional compromises associated with large openings – insects, glare and loss of privacy.

Homeowners across the world are delighted with their integrated screens and shades. In the Portland, Oregon Heather appreciates the built-in screen: “The insect screen is particularly great. Some mornings, I’ll just open two panels of the door, slide the screen across and the whole house benefits from a free flow of fresh air. It’s not intrusive at all.”

While in the United Kingdom, Gillian is pleased with her built-in shades: “The integrated blinds really appealed to me. I didn’t want any curtains in my house, but I wanted the capability to occasionally block the light out and to close the windows off at night.” 

Our built-in blockout shade also enhances the thermal properties of the door, with independent tests showing a reduction in the U-value by 17%.

Centor Integrated Folding Door with built-in insect screen
Centor Integrated Folding Door with built-in insect shade


Centor door finishes – wood
Centor door finishes – aluminum
Centor shade fabric options
Centor screen mesh options
Screen and shade configurations
Folding handle heights