Door Systems
Bifold Doors
Accordion fold panels for the widest possible opening.
Bifold door panels fold accordion-style and stack flat to one or both sides, delivering the widest possible clear opening in the smallest footprint. The top-hung hardware system puts zero structural load on the sill, allowing a truly flush threshold.
as low as
0.27
U-Factor
as low as
0.21
SHGC
up to
0.48
VT
NAFS rated
A3
Air Tightness
Frame Specifications
SeriesDoor Systems
MaterialPultruded Fiberglass
Frame Depth4 1/2"
Nail FlangeTop-hung system; low-profile sill standard
Warranty50-year frame, 20-year glass, 20-year paint
Size & Configuration
Min Width48"
Max Width240"
Min Height80"
Max Height108"
Min Sq Ft—
Max Sq Ft—
Configurations2-Panel, 3-Panel, 4-Panel, 5-Panel, 6-Panel
Common Sizes
6/0×8/08/0×8/012/0×8/016/0×8/020/0×8/0
Glass & Finish Options
Glass OptionsClear, 272 Low-E, 366 Low-E, 340 Low-E
Glass Thickness1/8", 3/16", 1/4"
TemperTempered (required)
Argon FillAvailable
Frame ColorsBlack, Dark Bronze, White, Custom
HardwareBlack, Dark Bronze, Brushed Nickel
ScreensRetractable screen track available
Standard Features
Top-hung hardware — zero sill load
Flush sill — ADA compliant optional
Anti-lift track standard
Panels fold flat against wall
Up to 20 ft opening width
Fiberglass frame — no warping or thermal bridging
Ready to spec the Bifold Doors?
Get a custom quote for your project dimensions and specifications.