The most popular replacement style in American homes. Both the top and bottom sashes slide vertically and tilt inward, so you can clean the outside glass without a ladder. OKNA’s double-hung windows use a multi-chamber vinyl frame with an integral interlock and recessed tilt latches for a tight, draft-free seal.

Available in the 500 Insul-Tec for excellent everyday value or the premium 800 Enviro-Star for heavier extrusions and the best thermal numbers.

Slider windows glide horizontally on a track, so nothing projects into or out of the room - ideal over kitchen sinks, in tight spaces, or anywhere a modern, unbroken sightline is wanted. OKNA sliders pair a clean profile with the same energy-efficient insulated glass and lifetime-warranty hardware as the rest of the line.

A picture window is a fixed (non-opening) pane that frames a view and floods a room with daylight. Because there are no moving parts, picture windows achieve the lowest U-factors in the lineup - with OKNA’s triple-pane, dual-argon, warm-edge glass package reaching as low as U-0.17. Often combined with operable windows on either side.

The Forester sliding patio door is OKNA’s rugged, value-focused patio option - built for security and dependable everyday operation, with the same warm-edge insulated glass and lifetime-warranty hardware found across the line.