MODEL 6800 InSight Vinyl Double Hung Windows

State of the Art Window Design - Our top-of-the-line vinyl model offers beauty, performance and versatility - everything you want in a window.

Our products and processes emphasize energy savings – and that means we consume less energy to minimize the CO2 released into our environment.

Our buildings save energy by utilizing in-floor radiant heating during off-peak energy hours and by using motion controlled lighting.

Our processes conserve resources – like filtering and reusing glass wash water for glass rinsing, and recycling our vinyl and glass scrap created during the fabrication process. And of course, we have a recycling program for metals, cardboard and paper.

Interstate belongs to a voluntary energy cooperative that monitors and helps reduce energy usage during times of peak demand. We are helping to protect our community from blackouts, to keep energy rates stable and to help the environment by reducing reliance on peaking power plants.


Remarkable beauty, exceptional performance and distinctive design of the new InSight Model 6800 window leads the way in energy efficient vinyl windows from Interstate.

World class engineering and advanced material science creates a new window standard for performance, economy, strength and efficiency..


• Up to 14% more glass and light than many traditional wood and vinyl windows.
• Over 20% more vinyl by weight than many typical vinyl double hung windows.
• Extreme energy efficiency.
• Extreme structural strength, base window includes PG-40 structural and water rating on double hung gateway test size of 40” x 63” withstands wind driven rain and winds to 127 mph. With optional thermal reinforcement the InSight double hung meets a PG-55 rating at wind/rain speed of 148 mph. The addition of modified thermal reinforcement and locks and tilt latches achieves a Commercial Rating of C-55 on a 48” x 80”, and a Commercial Rating of C-35 was earned on a massive 56” x 91” double hung window size.
• Minimal air infiltration – saves energy and keeps home comfortable. Up to 15 times less air leakage than ENERGY STAR qualification.
• Stunning appearance from both inside and outside the home.
• Three interior laminate woodgrains available.
• Unlimited exterior paint colors.
• Low profile tilt latch for easy tilt-to-clean.
• Continuous InterLock promotes security and structural strength.
• Multiple internal chamber placement designed for superior structural and thermal performance.
• Anti-drift design keeps top sash in place when operating primary lower sash.
• Limited Lifetime Warranty

Exterior Stock Vinyl Colors
Interior Stock Laminates
Custom Paint Finishes (15 in Stock Exterior Colors)
Custom Paint Finishes (34 Special Order Exterior Colors)

Incredible Thermal Values

Standard Whole Window NFRC Certified Dual Energy Saver Glass Package
  • Nominal 3/4”
    U-Factor: Double Hung & Slider- .26
    Low E + clear; argonWith Energy Saver IS – .23
    Low E + Low E inside surface; argon
Standard Whole Window NFRC Certified Triple Glazed Glass Packages
  • Nominal 1 1/8”
    Triple Fuel Saver U-Factor:
    Double Hung & Slider- .20
    Low E + Low E + clear; argon + argon
    Triple Fuel Saver Plus U-Factor:
    Double Hung & Slider – .17
    Low E + Low E + clear; argon + argon
    and/or krypton

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 vinyl windows come standard with the industry’s finest hardware system. The operators, locks, and hinges have all been developed to work together to meet or exceed maximum performance requirements. Interstate provides the strongest, most attractive, easiest operating and highest performing hardware in today’s market.

Surface 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, Simulated Divided Lites (SDLs) are permanently adhered to the panes inside and out and are designed to look like a true multi-paned window.

Grid Color Options

InSight Model 6800 Grids:

Flat Grids 
• White
• Clay
• Bronze Exterior/White Interior
• Custom Painted

Contoured Grids 
• White
• Clay
• Bronze Exterior/White Interior
• White Exterior/Woodgrain Laminate Interior

SDLs (Simulated Divided Lites) 
• White (exterior & interior)
• Clay exterior/White interior
• Bronze exterior/White interior
• White exterior/Woodgrain Laminate Interior
• Removable Grids with Frame Surround, interior mounted
• Custom Painted

* Only Flat and exterior Simulated Divided Lites can be custom painted.

Sample Grids