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What Are Egress Windows?

What Are Egress Windows?

Does My Tucson Basement Need Them?

A finished basement can be one of the simplest ways to add additional space to your Tucson home. It can be an a good area for bedrooms, a family room or a playroom.

As you get ready for your basement remodeling project, be aware that you may need to install larger windows. Egress windows are large openings that provide a secondary exit in an emergency. They can also add more natural light and make your basement feel more inviting.

Basement bedrooms and living spaces are required to have egress windows. Living spaces can be offices, TV rooms or workshops. This requirement also involves unfinished basements.

Why Are Egress Windows Important?

Basement fires happen regularly, with firefighters responding to about 6,500 of them in the U.S. annually.

Time is limited to escape a house fire. It can become fatal in as little as 2 minutes and engulf a home within 5 minutes, according to the National Fire Protection Association.

When you only have minutes to escape, large egress windows are an important altermative 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 made before World War II.

Homeowners during that era used this type of basement for utility space, laundry and storage.

Depending on its age, your home may have been built before modern egress window requirements. Or it may have windows with a shorter opening.

If you own an older home, there’s a good chance 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 enter through.

How to Measure Your Basement Windows

Unsure if your existing basement windows meet modern 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.

Does your measurement match the required 821 square inches—or 5.7 square feet? If not, you need to have larger windows installed.

Requirements for Egress Windows in Basements

Building codes mandate the size of basement windows. This allows for a quick 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 beneath ground level, you will need to have a well dug at the base of the window frame. This well needs to 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 add several small landscaping features, like crushed rock or potted plant.

It's acceptable for basement windows to be under a deck or porch. But there should be enough clearance for an average-sized adult to get out.

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 removed from the inside without keys or tools.

It’s also important that basement windows can fully open. 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 differ. Check with Tucson building officials to learn more about area guidelines.

Choosing Basement Egress Windows

There are several types of windows that work well for basements and meet building code requirements.

Casement Windows

Casement windows are a good option for limited wall space. These windows open like a door, swinging free to provide an ample opening.

Casement windows open by turning a handle. Pella® casement windows use a crank that folds away. That way, the crank won't disrupt window treatments.

This window must have at least 8 square feet of net opening.

Sliding Windows

Sliding windows are great for adding more light to spacious basements. These windows have to be wider and taller, 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 have extra-durable tandem nylon rollers. These rollers provide even smoother operation.

This window must have at least 16 square feet of net opening.

Talk with the Professionals at Pella of Tucson

Basement escape windows are a necessity for downstairs living spaces. They can be a lifesaving device in an emergency. Include our professionals at Pella of Tucson. We can help when you're redoing your basement.

We can also assist you in finding the right window that fits your project, budget and local egress requirements.

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