Choosing the Right Window Size for Your Home

When you are browsing options for replacement windows, there are plenty of factors to take into account. This includes choosing the material they are made of and matching them to your home’s aesthetic. Another critical factor is the size of the window. Window size has an impact on how much natural light is let in, ventilation, and insulation, so it is important to get it right.

What to Consider

While there is no one way to determine the right window size for your home, there are a few things to consider. These include both rules like building codes and subjective design choices like home style.

Building Codes and Structure

When you are finding the right size for your windows, the first step you should take is familiarizing yourself with your local building codes. These restrictions are put into place to ensure safety, so your windows must be up to the standards. You can check with a contractor, builder, or window installer if you are not sure what the codes are for your area.

Style of Home

The architectural style of your home also plays a role in determining window size. Oversized windows are a defining feature of modern style, while bay windows or casement windows work well in traditional homes. Mismatched styles can decrease both curb appeal and home value, so it is important to prioritize finding a window size that complements your architecture.

Window Sill and Window Head Height

Window sill height is regulated by the International Residential Code (IRC). According to the IRC, sills on operable windows must be at least 24 inches from the floor. This is the ideal height to be able to see out of them while sitting down on a chair or a bed. If your design requires a lower sill, you are limited to non-operable options, such as picture windows or floor-to-ceiling windows.

There are no rules governing the head height (the main horizontal part that forms the top of the frame) of the windows in your home. This design choice is subject to your personal preferences. Keep in mind that if there is too much space between the window head and the ceiling, the window will let in less natural light. On the other hand, too little space leaves no room for curtain rods or other window treatments.

Width-to-Height Proportion

The width-to-height ratio of your window is another subjective design choice. The proportion will depend on both the type of window you choose and the architectural style of your home. For example, picture windows come in a variety of shapes and sizes because they are fixed, sliding windows are often wide, and double-hung windows are typically tall. Once you select your window proportion, keep it consistent throughout all of the windows in the house to create a cohesive look.

Common Window Sizes

Standard sizing for common styles of windows will also help you determine what will work for your space. To get an idea, here are some of the most common standard window sizes:

• Double-hung window: 24 to 48 inches wide, 36 to 72 inches high
• Bay window: 42 to 126 inches wide, 36 to 78 inches high
• Sliding window: 36 to 84 inches wide, 24 to 60 inches high
• Picture window: 24 to 96 inches wide, 12 to 96 inches high
• Casement window: 14 to 35.5 inches wide, 29.5 to 77.5 inches high
• Awning window: 24 to 46 inches wide, 20 to 92 inches high

The Right-Sized Windows

Once you determine the correct size for your windows, stop by The Window Depot to check out our extensive selection of high-quality, energy-efficient windows. You can also browse our inventory on our website. If you need help finding the right window size, contact us today.