Meet our top-of-the-line sliding patio door model -- a great choice for both new construction and replacement projects.
Exterior Stock Vinyl Colors
Interior Stock Vinyl Colors
Custom Paint Finishes (14 in Stock Exterior Colors)
Limited only by your imagination!

Meet our top-of-the-line patio door model — a great choice for both new construction and replacement projects. With this model, you will have more design choices than ever to complement any interior.

This model also comes with an optional patio door foot lock, available in white and adobe. When looking for a patio door to compliment your home, you want superior quality. And that’s an Interstate patio door.


  • Uniform Panels, Equal Glass Size.
  • Multi-Point Hardware Lockset.
  • Deluxe Handle Set.
  • Extruded Screen with Auto-Latch
  • 2, 3, & 4 section availability.
  • Precision Bearing Rollers.
  • Keylock
  • Custom exterior paint colors available.
  • Duralite Glass Spacer.
  • Flat Colonial, Contour Colonial, Polished Brass
    Colonial Grids or Simulated Divided Lites
  • Optional Footlock.
  • Optional Extension Jambs.
  • Hardware Color options: White, Adobe, Brushed Nickel,
    Brushed Brass

Climaguard™ Low E Glass and Argon Gas Add Comfort and Energy Savings

Low E is a transparent metallic oxide coating applied onto a glass surface. The coating allows short-wave energy to pass through but reflects long-wave infrared energy, which lowers the U-value and that means more energy savings. An odorless, colorless, tasteless, non-toxic gas, argon is six times denser than air. It is used to replace air between the glass panes to reduce thermal energy transfer and heat loss.

ClimaGuard glass has heat reflective coatings – microscopically thin layers of metal and metal oxide that filter energy by keeping warmth inside in winter and outside in summer.

Built Tough Hardware

All Interstate patio doors come standard with the industry’s finest hardware system. The operators and locks have been developed to work together to meet or exceed industry performance requirements. Interstate selects from only the strongest, most attractive, easiest operating and highest performing hardware available in today’s market.

Model 6400 Patio Door Handle
Optional Foot Lock
Grid Options

Grids bring a distinctive look to your home. Four grid styles in a variety of color and style combinations offer many choices when selecting grids for your windows. Grids Between Glass (GBG) afford easy cleaning, Applied Surface Grids (ASGs) are permanently adhered to the panes inside and out and are designed to look like a true multi-paned window.

Model 6400: Color Options

Flat Colonial

  • White
  • Adobe
  • Bronze ext./White int.
  • Custom Painted*

Contoured Colonial

  • White
  • Adobe
  • Bronze ext./White int.
  • White ext./Light Oak int.
  • White ext./Cherry int.

Polished Brass Colonial

SDL – Simulated Divided Lites: Colonial Contour

  • White
  • Adobe
  • White ext./Light Oak int.
  • White ext./Cherry int.
  • Custom Painted*

*Only Flat and Applied Surface Grids can be custom painted.

Sample Grids