Bifold Exterior Doors
For clear, unobstructed openings, choose expansive bifold exterior doors. With panels folding to the exterior and stacking at the sides, these door systems intentionally provide the spaciousness you and your clients' desire. With an optional flush sill detailing helps create a seamless transition from the interior to the exterior, they are popular for restaurant facades, pool enclosures and porches.
Bifold Doors Data Sheet
Escutcheons / Lever Handles
Finishes: Clear anodized (EV-1) or dark bronze anodized (EV-5) aluminum.
First digit = total panels. Second and third digit = folding panel groupings. 220, 321, 330, 431, 440, 541, 532, 550, 633, 651, 660, 743, 761, 770
All glazing is per project specifications. Duratherm can accommodate most configurations and make-ups from 1/8" single glazed to a maximum of 1" security glass. Contact the factory for customized glazing and glass stop configurations.
Clear glass opening: Unit height minus 163/8". For clear glass width, contact factory.
The minimums and maximums shown are intended as guidelines. For applications that exceed these ranges, please contact the factory for assistance.
NOTE: Standard wood threshold may not meet ADA maximum height requirements.
Frame Depths/Leaf Thickness
*Contact factory for frame depths less than 6 1/4".
Wood Species & Finishes
Duratherm sources all materials by project — from only providers we know and trust. Many of our woods are from Forest Stewardship Council® (FSC- C108949) certified sources. We obtain others from sustainably harvested plantations. Fourteen domestic and exotic wood species offer a wide range of colors, grains, and textures.
Please contact us for information about finishing options (including paint, Sikkens, clear lacquer, stain, bleach stain, oil, etc.) and to discuss the use of a species not in our standard offering. We consider availability, durability, machining, and gluing characteristics to determine the feasibility of your choices.
Exterior Wood Species
Interior Wood Species
1HEAD SLIDING PANEL
2HEAD SWING PANEL
5SILL SLIDING PANEL
6SILL SWING PANEL
Specially developed extruded silicone gasket sets the glass by compression. Our proprietary system is long-lived, low maintenance and water resistant.
Our special silicone wet glazing compound bonds to the glass for long-lived sealing. Plus, our continuous extruded silicone weatherstrip runs around the frame perimeter and the seal is not compromised by seasonal expansion and contractions of the sash and frame.