Does My Mt. Pleasant Basement Need Them?
A finished basement can be one of the easiest ways to add more space to your Mt. Pleasant home. It can be an an ideal area for bedrooms, a family room or a playroom.
As you prepare for your basement remodeling project, keep in mind you may need to install wider windows. Egress windows are large openings that offer another way out 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 mandate also affects unfinished basements.
Why Are Egress Windows Important?
Basement fires occur frequently, with firefighters responding to about 6,500 of them in the U.S. annually.
Time is limited to get out when there’s a house fire. It can become deadly 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 get out, correctly sized 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 constructed before World War II.
Homeowners during that era used this kind of basement for utility space, laundry and storage.
Depending on its age, your home may predate today’s egress window requirements. Or it may have windows with a smaller 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 let in fresh air.
But these windows are small—too small for an adult or fully-outfitted first responder to enter through.
How to Measure Your Basement Windows
Not sure if your present basement windows meet modern requirements? All you need is a tape measure.
- Open the window completely.
- Measure the width and height of the opening.
- Multiply the width by the height.
Is your measurement equivalent 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 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 must 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 include a couple small landscaping features, like crushed rock or potted plant.
It's OK for basement windows to be under a deck or porch. But there needs to be enough room 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 vital that basement windows can completely 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 Mt. Pleasant building officials to learn more about area guidelines.
Choosing Basement Egress Windows
There are several styles of windows that work well for basements and satisfy building code requirements.
Casement windows are a good option for not a lot of wall space. These windows work like a door, swinging free to provide an ample opening.
Casement windows open by using a handle. Pella® casement windows feature 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 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 shifting the sash from left to right. Some Pella models feature extra-durable tandem nylon rollers. These rollers deliver even more effortless operation.
This window must have at least 16 square feet of net opening.
Talk with the Professionals at Pella of Mt. Pleasant
Basement escape windows are an essential for downstairs living spaces. They can be a lifesaving tool in an emergency. Meet with our professionals at Pella of Mt. Pleasant. We can help when you're remodeling your basement.
We can also help you find the right window that matches your project, budget and local egress requirements.