Do Bathroom Windows Need to Open? (Regulations & Laws)
When it comes to bathroom design, there are many details to consider, including the windows. Some people believe that bathroom windows must be able to open, while others think that it’s not necessary. Which is it, though?
The requirement for an openable bathroom window varies depending on building codes and regulations. In some cases, an openable window is mandatory to provide proper ventilation and prevent moisture buildup, while in others, it may not be necessary.
Ventilation and fresh air aren’t the only reason to have open windows. In this article, we’ll discuss why having windows can be important and other options for windowless bathrooms. Let’s get started!
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Here’s a Quick Pro Tip!
While having a bathroom window that opens can be convenient, it’s not your only option. There are plenty of other ways to eliminate moisture and keep your bathroom free of humidity and mold build-up.
Here are three of our favorite options to keep your bathroom clean, dry, and comfortable after you’ve showered:
1. Exhaust Fans – Use whenever you shower to prevent moisture build-up on your walls.
2. Dehumidifier – Use all the time to prevent excess moisture in the air.
3. Potted Plants – Did you know that adding a plant to your bathroom helps provide extra oxygen while it soaks up moisture from the air?
Bathroom Windows
Bathroom windows can be very divisive. Should they remain open or closed? Sometimes, the windows in a bathroom are designed to not open at all. Who would do that? We’re talking about all things windows right now!
Does a Bathroom Need an Open Window?
While a bathroom doesn’t need a window open, it can be beneficial. For example, if your bathroom window faces somewhere private, having it open during a shower can help ventilate the bathroom, decreasing the amount of steam and humidity build-up.
However, there is no need to fret if your bathroom does not have any windows. Instead of a window, your bathroom will have some ventilation, most likely an exhaust fan in the ceiling. If you still have humidity problems with the fan on, you may want to consider purchasing a dehumidifier to decrease the humidity in the air.
Should Bathroom Windows Be Open in Summer?
Opening your bathroom windows or any other windows in your home during the summer invites humidity to enter. If you have the air conditioning on in your home already, you may want to avoid opening windows.
If you do not have air conditioning or are trying to air out your bathroom, opening the windows is perfectly fine. Either way, if you are concerned about humidity and moisture levels in your bathroom, you should have the exhaust fan on.
Do You Need an Opening Window in a Bathroom?
A bathroom doesn’t need a window that opens as long as it has ventilation. However, an open window can also help with humidity and moisture, especially if the exhaust fan isn’t working properly.
Some bathrooms have windows that are just for show. They may not open due to being painted shut or designed not to open. No matter what, these style windows are okay for a bathroom if you want them for the aesthetics of a window.
Is It Okay to Have a Bathroom Without Windows?
Plenty of bathrooms don’t have windows. For example, if your bathroom is in the house’s interior and is not against an outdoor wall, it probably won’t have a window. As long as your bathroom has an exhaust vent, it’s not a problem.
If your bathroom doesn’t have a window, it is important to ensure it has a working exhaust fan and vent. These ensure that air is properly circulated in your bathroom and prevents mold and mildew from accumulating. You may also want to use a dehumidifier in your bathroom.
What Happens if You Don’t Open Bathroom Windows?
If you choose not to open your bathroom windows or physically cannot open them, you may notice that your bathroom keeps in more humidity, and your shower curtain may grow mold or mildew.
Of course, you can always treat your shower curtains with a mold eliminator to help prevent this. You may also want to ensure that your bathroom exhaust fan is on whenever someone is showering.
Should You Leave the Window Open When Showering?
If you feel comfortable with an open window while you’re showering, it can help even out the humid conditions your shower brings. It can also help quickly and easily eliminate steam and prevent your mirrors from fogging.
Of course, if you don’t want to leave the window open, you can always open it after. Another option is to turn on your exhaust fan and dehumidifier instead of having the window open. Either way, quickly eliminating the moisture in the air is crucial to prevent mold and mildew.
Does a Bathroom With a Window Need an Extractor Fan?
A bathroom either needs an extractor fan (otherwise known as an exhaust fan) or a window that opens when necessary. Either way, you’re circulating the air in your bathroom, which is the important part.
An open window and an extractor fan can serve the same purpose in your bathroom: circulate the air. Sucking out the hot moist air and replacing it with cooler air can help prevent mold from growing in your bathroom.
What Is the Code for Bathroom Ventilation?
Bathroom code varies depending on city and state, but generally, it requires either an openable window for ventilation or some kind of mechanical ventilation, typically an exhaust vent.
For example, the Pennsylvania building code for ventilation states, “A bathroom that does not have an operable outside window shall be equipped with an exhaust fan for ventilation.” Similar codes exist for each state.
Moisture Concerns
For many, showering is a highlight of the day. However, it can get worrisome if you’re unsure how to get rid of all that moisture. After all, no one wants to deal with mold build-up in a bathroom. We’ll talk about what you can do about that moisture next.
Does Leaving Your Bathroom Window Open Cause Mold?
As long as it’s not overly humid outside, opening your bathroom window will reduce the humidity in your bathroom, lowering the chances of mold growth. So, in fact, opening windows doesn’t cause mold; it prevents it.
Humidity is a huge factor in mold growth. Any area over 60% humidity is more likely to see mold growth than under 60%. Opening a window after a bath or shower is a great way to quickly lower humidity in your bathroom.
Does Leaving a Bathroom Window Open Help With Humidity?
As long as it’s less humid outside than inside, opening windows can greatly help even out the humidity in your bathroom. You should also turn on any ventilation or exhaust fans available in your bathroom while you shower.
If you’re concerned with humidity, you should leave a bathroom open for at least an hour after showering. This ensures that your bathroom releases any built-up humidity before you close the room back up.
How Do I Stop Condensation in My Bathroom?
Condensation is when the warm, damp air in your bathroom becomes so dense water droplets form on surfaces. You can help combat this water by increasing airflow to your bathroom while you shower.
There are a few easy ways to increase your bathrooms airflow:
- Use your bathroom’s built-in exhaust fan.
- Open a window.
- Use a dehumidifier.
- Use a hanging moisture absorber.
- Use a moisture eliminator.
How Do I Prevent Mold in My Bathroom Without Windows?
If your bathroom doesn’t have windows, it should have a built-in exhaust fan for ventilation. Make sure to turn this fan on before you shower or otherwise run hot water to help eliminate humidity.
Keeping humidity and condensation trapped in your bathroom leads to mold growth. You may also want to spray your tub and shower curtain with a mold preventer and be sure to squeegee off any excess water after a shower.
How Do You Get the Moisture Out of a Bathroom Without a Window?
You should always turn on your bathroom exhaust fan before you shower to help prevent moisture build-up in the bathroom. If your bathroom doesn’t have an exhaust fan, use a dehumidifier.
A dehumidifier prevents moist air from circulating by drawing it out of the room. The moisture is stored within the unit and will need emptying from time to time. Otherwise, the unit will stop working correctly.
How Do You Dehumidify a Bathroom With No Windows?
You should use a dehumidifier in a room with no windows to help prevent mold and humidity. You can also use the bathroom exhaust fan, as long as there’s one included in the room.
You may also want to consider adding a ceiling fan to your bathroom, if possible. This allows you to have extra air circulation in the bathroom, which improves ventilation and prevents mold growth.
Window Costs
Now that we’ve discussed why windows are important let’s discuss how much they cost. After all, if you don’t technically need them, why pay for something extra? You might be surprised at how cost-effective they are! Check it out below.
What Type of Window Goes in a Bathroom?
Most homes have casement windows in their bathroom. These windows open out, allowing you to have unimpeded airflow to help provide ventilation. This can also help prevent mold and mildew build-up due to extra moisture.
That being said, any open window will help reduce moisture in your bathroom. Other common bathroom windows include slider windows, crank windows, and awning windows. Which you choose is up to you and your bathroom’s aesthetics.
How Much Does It Cost to Make a New Window Opening in a Bathroom?
To completely install a new window, including adding the opening, will cost between $300 and $1,000 per window to be made and installed. Remember, labor costs will also need to be included and may cost up to $40 per hour.
Most of the cost of adding a window comes from the window itself. The size and type of window you choose will affect how much it costs. Obviously, the larger the window, the higher the price will be.
How Much Does It Cost to Add a Small Bathroom Window?
Even adding a small window to your bathroom will cost at least $300, including labor and materials. While you can install a window yourself if you’re familiar with the installation, if you’re not, it’s best to call a professional.
Labor for adding a window to your home will typically run $40 an hour. But, of course, adding a small window isn’t a very long process. You can typically do it within a day or two if you have all materials ready beforehand.
How Much Would It Cost to Put a Window in a Bathroom?
The cost of a new bathroom window varies depending on the size and type of the window and the associated labor costs. In general, a new window costs between $300 and $1,000 per window to be added.
Before deciding on your new windows, you should discuss your options with the installer. They’ll be able to tell you what kind of windows will work best with your current bathroom setup.
You might also enjoy our post on Can Bathroom Windows Be Clear?
Related Questions
How Do You Dry Your Bathroom in the Winter?
No matter the season, you can dry out your bathroom by opening the bathroom window if you have one. Of course, you may not want to leave your bathroom window wide open during a cold winter. Instead, only open it a quarter way and leave it open for an hour after you shower.
You can also utilize a space heater and a dehumidifier in your bathroom to help keep it dry and prevent moisture from accumulating. The heater will also help if you leave your bathroom window open.
Does Opening a Bathroom Window Get Rid of Smells?
Like humidity and moisture, opening a window can help eliminate bad odors in a bathroom. This is because opening a window improves ventilation in your bathroom. But, of course, having an exhaust fan will also help.
While utilizing an open window to eliminate smells won’t work immediately, it’s a free way to help circulate the air in your bathroom. As long as you have a screen in your window, leaving it open won’t encourage bugs to enter.
How Often Should You Air Out Your House?
To help prevent stale air and reinvigorate the household, it’s recommended to open windows and open doors at least 15 minutes a day, weather permitting. But, if the weather is nice, you can leave the windows open longer.
If you are doing any renovation, especially painting, it is vital to have plenty of ventilation in your home. You can accomplish this by utilizing large exhaust fans or opening all the windows and doors in the home to ensure proper venting of toxic fumes.
Final Thoughts
Open windows in your bathroom can greatly increase your home’s airflow and air quality. However, it is not vital to have as long as you have other options for airflow, such as an exhaust fan. Ultimately, your choice is up to you, as long as there is airflow.
