What Are Egress Windows?
Does My Ketchum Basement Need Them?
A finished basement can be one of the most cost-effective ways to add additional space to your Ketchum home. It can be an an ideal area for bedrooms, a family room or a playroom.
As you get ready for your basement remodeling project, keep in mind you may need to put in larger windows. Egress windows are large openings that give a secondary exit in an emergency. They can also add more natural light and make your basement feel more welcoming.
Basement bedrooms and living spaces need to have egress windows. Living spaces can be offices, TV rooms or workshops. This rule also applies to unfinished basements.
Why Are Egress Windows Important?
There’s not a lot of time to get out when there’s a house fire. It can become fatal in just 2 minutes and overtake a home within 5 minutes, according to the National Fire Protection Association.
When you only have minutes to escape, large egress windows are a critical secondary exit.
Basement Windows in Older Homes May Be Too Small
Basements in older homes were not designed to be sleeping or living areas. This is especially true for homes built before World War II.
Homeowners back then used this kind of basement for utility space, laundry and storage.
Depending on its age, your home may have been built before up-to-date egress window requirements. Or it may have windows with a smaller opening.
If you have an older home, there’s a good possibility it has short windows in the basement. Also known as hopper windows, these above-ground windows open inward to provide fresh air.
But these windows are small—too small for an adult or fully-equipped first responder to climb through.
How to Measure Your Basement Windows
Unsure if your present basement windows meet today’s requirements? All you need is a tape measure.
- Open the window as wide as possible.
- Measure the width and height of the opening.
- Multiply the width by the height.
Is your measurement equal to the required 821 square inches—or 5.7 square feet? If not, you need to have taller and wider windows installed.
Requirements for Egress Windows in Basements
Building codes mandate the size of basement windows. This allows for a speedy exit in an emergency.
According to the International Residential Code, basement windows must have:
- An opening width of at least 20 inches.
- An opening height of at least 24 inches.
- A net clear opening of at least 821 square inches—or 5.7 square feet.
- A sill no more than 44 inches off the floor.
What if My Basement Windows are Below Ground Level?
If your basement windows are under ground level, you will need to have a well dug at the base of the window frame. This well should be at least 36 inches wide and 36 inches long. If the well is more than 44 inches deep, it will need a fixed ladder or steps.
Using timber or concrete blocks in the well makes it simple to add steps. Plus, you can incorporate a couple small landscaping features, like crushed rock or potted plant.
It's all right for basement windows to be under a deck or porch. But there must be enough clearance for an average-sized adult to exit.
There should be at least 36 inches between the top of the window well and the bottom of the deck or porch joists.
Other Requirements for Egress Windows in Basements
Because basement windows are a way out, they must open from the inside. Any screens, grilles or bars need to be taken off from the inside without keys or tools.
It’s also essential that basement windows can open entirely. The window sash shouldn’t interfere with the opening. This allows your family to quickly exit—or first responders to quickly enter.
Local requirements for basement windows may vary. Check with Ketchum building officials to learn more about area guidelines.
Choosing Basement Egress Windows
There are several styles of windows that work well for basements and fulfill building code requirements.
Casement windows are a good option for limited wall space. These windows work like a door, swinging free to provide an ample opening.
Casement windows open by turning a handle. Pella® casement windows incorporate a crank that folds away. That way, the crank won't interfere with curtains.
This window must have at least 8 square feet of net opening.
Sliding windows are great for adding more light to big basements. These windows have to be bigger, because the opening is only half as wide as the window. This is due to the sash, which slides horizontally.
Sliding windows open by pushing the sash from left to right. Some Pella models include extra-durable tandem nylon rollers. These rollers give even easier operation.
This window must have at least 16 square feet of net opening.
Talk with the Professionals at Pella of Ketchum
Basement escape windows are a must-have for downstairs living spaces. They can be a lifesaving device in an emergency. Meet with our professionals at Pella of Ketchum. We can help when you're updating your basement.
We can also help you find the right window that matches your project, budget and local egress requirements.