Ultra™ Series | C650 Fiberglass Windows

A variety of premium exterior vinyl frame colors provide beautiful options to match your home’s unique style. Standard frame colors include white and tan. Premium exterior finishes range from bronze to silver.

We’ve developed our own high quality, signature vinyl formula that is produced in controlled environments to exacting standards. The result is a high performance product that is heat stable, will not corrode over time, and is very low maintenance.

The Positive Action Lock, on sliders and single hung windows, opens or closes and locks the window with one motion. Meets or exceeds the rigorous forced entry codes. Casements and awnings operate with an innovative folding handle that tucks out of the way and the locking hardware offers smooth, easy operation.

Style Line Series windows are covered by the Capitol Door & Window Lifetime Limited Warranty, and are eligible to be upgraded to the Full Lifetime Warranty for a fee if selected at the time of purchase. Ask your Capitol Door & Window Certified Dealer for more information.

Chose a single hung window for venting and daylight. The bottom sash is operable and opens by moving upward. Pulling downward closes and locks the window. Ultra Series fiberglass single hung windows have two choices for hardware: a Positive Action Lock or Cam Lock.

Horizontal sliders are a common window style. Choose from a left or right side operable sash to allow airflow into any room. Ideal for windows facing a balcony or patio because they do not protrude toward the exterior of the home. Great for replacement window and new construction jobs.

Choose a casement window for maximum ventilation in your home coupled with an unobstructed view. They hinge on the side and open just like a door. This fiberglass window style comes with a folding nesting handle set.

Ultra Series fiberglass awning windows open outward from the bottom allowing for excellent airflow. Awning windows come with a folding nesting operating handle.

Picture windows are the best way to frame a beautiful view. These inoperable fiberglass windows let in natural light and can be used in combination with operable fiberglass windows if airflow is desired in a particular room.

Ultra Series fiberglass radius windows come in operable or inoperable styles. What sets them apart is the curved feature, which can be a simple arched top or even a circular window shape. A beautiful and elegant option, radius windows can also have grids added.

Bay fiberglass windows are three-segment units that expand your space to the outdoors. Bow fiberglass windows are four or more equal-width panels that create a dramatic, curved space in your home. Add operating styles for airflow in addition to daylight.