Combination windows combine multiple window styles into one built unit, allowing larger openings to deliver better light, airflow, and design consistency. When properly sized and configured, combination windows improve function and create a cleaner, more intentional layout across a wall.
What Combination Windows are and How They Work
Combination Windows are Molded Together as One Unit
Combination windows are windows that are molded together into one complete unit. That means different window types can be built as a single system and installed as one piece.
This is where combination windows stand out:
- The window sections are built together, not installed as separate units.
- You can combine operable windows with fixed glass in the same system.
- The final layout depends on the opening size and the design you choose.
The Opening Size Controls What You Can Build
We can only build what your home can support. If your house has single windows with wall space between them, you cannot turn those into one combination unit because each opening is only wide enough for one window. The existing size limits what you can do.
However, if the opening is wide or tall enough, you can often build a combination layout that fits the space better and supports the look and function you want.
Pro Tip: Start with the opening. Once we know the width and height, we can confirm which combination of layouts makes sense for your home.
Common Combination Windows Types You Need to Know
Awning Casement with A Picture Window Above
An awning casement is a window that cranks out from the bottom. It opens outward and has a screen on the inside. It is called an awning casement because when you crank it open, it acts like an awning.
That design matters because you can often open it when it is raining and still get fresh air without bringing moisture inside. A common combination layout is an awning casement with a picture window molded above it. This creates a tall unit with ventilation below and fixed glass above.
Here is what that layout typically delivers:
- Ventilation from the awning casement
- Fixed glass above for light and view
- One complete unit built together
Triple Casement Layouts for Wide Openings
Another common option is a triple casement combination. In many layouts, it is three windows side by side. The two side windows crank out, and the middle window does not open, although you can vary the design.
Here is a simple example of how a triple casement combination is built:
- A wide opening is divided into three sections
- Each section becomes one window in the unit
- The side windows crank out for airflow
- The center window stays fixed for a clean view
This type of combination window works well because it balances ventilation and a centered sightline.
Key Takeaway: Many combination layouts pair operable windows on the sides with fixed glass in the center or above for a clean, functional design.
Need expert help choosing the right layout for combination windows? Contact Thermal King for a free consultation.
Popular Combination Windows Designs for Taller Openings
Transom Windows Added Above Casements
A transom window is a smaller fixed window placed above another window. In a combination system, you can add transoms above casement windows to build a taller unit that fills a large opening while keeping operable windows below.
One common design is:
- Three casement windows on the bottom
- Three transom windows above them
- All built together as one complete unit
This style is often chosen because it expands the glass area and keeps the operation where it is easiest to reach.
Mix and Match Layouts Based on Design Goals
Combination windows give you flexibility. You can build:
- One awning casement with a picture window above
- Three windows side by side as a triple casement system
- A six-window system with transoms on top and casements below
You can mix and match within reason, but the opening size still controls what is possible.
Where Combination Windows Do Not Work
Single Openings with Walls Between Them
If your home has single windows separated by wall sections, you cannot create a combination unit across them without changing the structure. Each opening is sized for one window, so the design is limited by the existing framing.
Size Limits Tall and Wide Configurations
Even in a tall opening, the size determines whether you can place an awning casement on the bottom with a picture window on top. The concept works well, but the dimensions still set the boundaries.
If you want a window layout that looks intentional, functions the way you need it to, and fits your opening the right way, schedule a quote with Thermal King today for combination windows.
