Windows

The most popular replacement style in American homes, and the one we’ve set more of than anything else. Both sashes slide vertically and tilt inward, so you can clean the outside glass without a ladder. The multi-chamber vinyl frame, integral interlock, and recessed tilt latches close up tight — no rattle, no draft.

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

Casement windows are hinged on one side and crank outward to catch the breeze. Because the sash presses into the frame as it locks, they deliver the tightest seal of any operable window — the right choice when energy performance is the priority. The 700 Casement line is purpose-built for this style, with multi-point locking hardware and the same warm-edge, argon-filled glass packages as the rest of the lineup.

Slider windows glide horizontally, so nothing projects into or out of the room — ideal over kitchen sinks, in tight hallways, or anywhere you want a modern, unbroken sightline. They pair a clean low profile with the same energy-efficient insulated glass and lifetime-warranty hardware as the rest of the line.

Bay and bow windows project outward from the wall to create a sunny reading nook, a display ledge, and a far bigger view. A bay combines a large center picture window with two angled side units; a bow curves four or more equal units in a gentle arc. We install them as engineered systems with insulated seat and head boards, so the whole assembly is structurally sound and as efficient as the windows in it. Some of our favorite transformations in our work are bay conversions.

A picture window is a fixed pane that frames a view and floods a room with daylight. With no moving parts to seal around, picture windows post the lowest U-factors of any style — OKNA’s triple-pane, dual-argon, warm-edge glass package reaches as low as U-0.17. We often pair one large picture window with operable casements or double-hungs on either side: the view in the middle, the ventilation at the edges.