Model 9850
CompositWood+ Double Hung Windows
CompositWood+ material combines the beauty of wood with superior, rot-proof durability and no-maintenance attributes of vinyl.
CompositWood+, the next generation of windows, is a revolutionary material blended with timeless design that surpasses the ambitions of even the most well known window manufacturers.
CompositWood+ is made from a proprietary mix of specialty polymer and acrylic resins, creating an “engineered composite”, super tough, solid core material. A permanent color surface technology called “Tough Coat™” is fused to the core materials during the extrusion process.
CompositWood+ is simply the best window you can buy. It provides the warmth and look of a finely milled wood window without the problems associated with wood.
Inside, select solid ToughCoat™ white.
Outside, choose from ToughCoat™ white (white interior); 14 in-stock factory painted colors; and virtually unlimited custom matched colors (15-year paint warranty).
14 in Stock Exterior Colors
Unlimited Color Match Exterior Colors
Custom blended colors available to suit your design needs – limited only by your imagination!
Nothing defines a home like the elegance and warmth of wood windows, but the maintenance problems and expenses associated with wood are simply overwhelming.
Metal and vinyl clad wood windows were only partial solutions. In the industry-wide pursuit of window excellence, CompositWood+ is the answer.Exclusive Light Lift™ SP (Superior Performance) Sash Balance System on all CompositWood+ Double Hung Windows
Constant Force, Constant Clean, T-Lock Balance
CompositWood+ double-hung windows are built exclusively with the Light-Lift SP (Superior Performance) Balance System. Light-Lift SP insures consistent, easy-to-manage tension whether opening or closing. It has built in dust plugs which help keep coils free of dust and debris and also act as weatherstripping, for additional energy efficiency.Interstate offers several ENERGY STAR® qualified glass packages to fit your needs and budget.
Increase energy savings by choosing double or triple pane windows that will add to the comfort of your home.
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.
Interstate’s high performance glass packages offer reflective coatings – microscopically thin layers of metal and metal oxide that filter energy by keeping warmth inside in winter and outside in summer. Also available with additional Certified Glass Packages, including Triple pane.
Built Tough Hardware
All Interstate 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.
Double Hung Applied Handle
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.
Sample Grids
Compositwood+ Grid Color Options
Flat Colonial
Contoured Colonial
SDLs (Simulated Divided Lites)
*Only Flat and Applied Surface Grids can be custom painted.
Protecting Our Environment & Our Community
Energy Efficiency at Interstate
Products that are recognized as the Most Efficient of ENERGY STAR in 2025 meet rigorous energy efficiency performance levels set by the U.S. Environmental Protection Agency. CompositWood+ has been awarded the ENERGY STAR Most Efficient mark for 2025.