Egress Windows Buying Guide (2024)

An egress window should be big enough to crawl through in case of emergency. In many areas, building codes require egress windows to be large enough to fit a firefighter and their equipment.

As you determine egress window size and placement, be aware that:

• The International Building Code advises that every bedroom must contain at least one egress window. The window must be at least 5.7 square feet, 20 inches wide by 24 inches high. Its opening must be no higher than 44 inches from the floor.
• For basem*nts, egress windows must be at least 36 inches in width and height and have a fully functioning opening. If a basem*nt window is more than 44 inches from the ground, a ladder or steps at least 12 inches wide must be present.
• Basem*nt egress windows must also include window wells that provide enough clearance to allow escape.
• Individual states and municipalities may have their own specifications for egress windows.

Different types of windows can serve as egress windows. However, they must meet the minimum requirements for size and clearance.

Casem*nt egress windows usually have one or more hinges at the side. These windows swing in or out to open like a door. This design allows for windows to meet the egress requirements, but be smaller in size. Casem*nt egress windows are the most popular type. Their measurements range from 28 inches to 36 inches wide by 35 1/2 inches to 48 inches tall.

Single-hung egress windows feature two panes of glass. The top sash is stationary and only the bottom sash raises. Single-hung windows are popular in older homes and colder climates. They need to be relatively large to meet the minimum size requirement for egress windows.

Double-hung egress windows feature two panes of glass. Both the top and bottom sash can be raised and lowered. They also need to be relatively large to meet the minimum size requirement for egress windows. Plan for a space that is 28 inches to 60 inches wide and 23 1/2 inches to 60 inches high.

• Most new homes are built in compliance with egress window code. When renovating an older residence, you might need to install replacement windows that are larger than the originals. Many egress windows will fit in a preexisting frame, though.
• In many cases, enlarging the height of the window opening requires less structural work. Enlarging the width may require additional horizontal structural support.
• Enlarging a hole or cutting a hole to accommodate a new window frame requires carpentry experience, especially in basem*nts made of solid concrete.
• Building codes require bedrooms to include egress windows for emergency escape. To meet requirements, choose a window that fits the available space.