Choosing the correct size of windows can improve your home’s energy efficiency, natural lighting and curb appeal. Here are three important things to consider when sizing your replacement windows.
As a rule of thumb, window contractors ensure that a window’s total glass area is between 20% to 30% of the total floor area. But for east- and south-facing windows, their size should not exceed 15% of the room’s floor area. The size of north-facing windows should be around 15% to 25% of the floor area, and west-facing windows should only be 10% of the total room floor area.
You need to find the right balance of thermal mass inside your residence to reduce energy costs and improve indoor comfort. Windows with more glass are generally OK for homes with higher thermal mass and large north-facing windows. But if your home has low thermal mass, it’s best to avoid windows with expansive glass.
Standard Window Sizes
Windows come in standard sizes so homeowners can have an easier time selecting replacement windows. Here are the standard sizes for some popular window styles:
- Bay: This type of window has a fixed window in the middle and a smaller, operable window on both sides. Its width usually ranges from 3 feet 6 inches to 10 feet 6 inches, while its height ranges from 3 feet to 6 feet 6 inches.
- Sliding: This window style is perfect for kitchens, bathrooms and other small spaces because it doesn’t require extra room in order to fully open. You can choose from 36 inches, 48 inches, 60 inches, 72 inches or 84 inches for its width. Meanwhile, for the height, you can select 24 inches, 36 inches, 48 inches or 60 inches.
- Double hung: This window style is versatile. It can suit various homes. Its standard width ranges from 24 to 48 inches, and its standard height can be anywhere from 36 to 72 inches.
STL Design and Build is a trustworthy contractor that provides top-notch workmanship. Call us at (314) 736-5800, or fill out our contact form for a free consultation.