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Benefits Of Casement Windows


Generally, casement windows open outward, thus providing significantly better ventilation than sliding or double-hung window of equal size. Unlike other windows, casement windows can be used to catch a passing breeze. Since it opens out, this allows for nearly the entire window to open. Sliding and double-hung windows are limited to less than a half area.


Casement windows are very difficult to break into because locks and keepers are embedded within the window frame. This makes it virtually impossible to break into without breaking glass.

Full View To The Outdoors

Casement windows provide virtually unobstructed views to the outdoors. Therefore homeowners can have a greater sense of openness and connection with the natural environment.


Some homeowners may purchase a traditional window style, such as double-hung windows, for entire home, but will use casement windows in places more difficult to reach. A casement window is an ideal window to place above cabinets, counter tops and sinks, because the handle mechanism makes it easier to open. Some people choose casement windows for bathrooms as well.

OKNA Casement 700 Series

Seven Sun Windows proudly offers casement windows by OKNA Windows & Doors. For over twenty years OKNA has been producing some of the most energy efficient windows in the industry. With extremely low infiltration rate, OKNA casement windows are also some of the most air-tight windows in the market today. The highest energy efficiency combined with the lowest infiltration rate of OKNA casement windows will help you save on energy bills and increase comfort in your home year round.

  • Fully welded beveled frame & sash for superior strength.
  • Maintenance free rigid multi-chamber vinyl profile.
  • Opens full 90 degrees for easy cleaning from inside.
  • Triple weatherstripping to significantly reduce air, water, dust and noise infiltration.
  • Progressive multi-point locking system for weather-tight seal draws the sash tightly and securely to the frame.
  • High performance, corrosion resistant, operators for effortless operation and easy adjustability.
  • Folding crank handles for minimal interference with draperies and blinds (standard).
  • Heatseal® warm edge spacer system for excellent thermal efficiency and drastic reduction in the possibility of condensation on the inside of your window.
  • Full fiberglass mesh screen standard with all casement windows.
  • Optional Wood Extension Jambs for 2 x 4 and 2 x 6 stud wall installation (for new construction windows).

A progressive multi-point locking system allows for a weather-tight seal by drawing the sash firmly and securely to the master frame. The multi-point locking system also offers added security by providing additional points of reinforcement on the window.

The casement opens a full 90 degrees for maximum ventilation and easy cleaning from inside the home.

Optional foam-filled insulated extrusions add energy efficiency - Deluxe version only.

Folding style crank handles, standard on all casement windows, minimize interference with blinds and other window treatments.

Color & Hardware Options

OKNA Windows offers three exterior color selections in addition to the standard Euro-White option to give your home a distinctive look and enhance its curb appeal. You can also special order custom exterior colors from a virtually unlimited selection of paints. OKNA Windows paints are environmentally safe and durable, giving your exterior a vibrant and long-lasting color finish. Three beautiful interior woodgrain laminate options are also available.

Interior Colors

Euro-White finish and Euro-White Lock

Almond Finish Almond Lock

Melrose Cherry Finish Antique Brass Lock

Cognac Finish Brushed Nickel Lock

Natural Finish Brushed Nickel Lock

Exterior Colors





All colors except Euro-White are available at an additional charge.


Thermal Performance

Structural Performance

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