A sink overflowing with water in a bathroom. Insurance companies classify water damage into three categories. If you suffer category 1 water damage, category 2 water damage, or category 3 water damage, call SERVPRO.

What to Do When Your Bathroom Floods

There’s water spreading across your bathroom floor. It’s moving fast, too. Your first instinct in the face of a flooded bathroom might be to panic, but it’s important to stay calm. The actions you take in the next few minutes can make a big difference in how dire (and expensive) the damage becomes.

In some cases, you’ll be able to handle the cleanup by yourself with a mop and a bit of patience. However, if sewage is involved or if the water has soaked into your subfloor or walls, put the mop down and call a professional.

Key Takeaways

The most common causes of bathroom floods are overflowing toilets, burst pipes, and failed supply lines.
When the water starts pouring, your first job is to stop the source of the water. Next, move people, pets, and valuables out of harm’s way.
You may be able to manage flooding on your own if the water is clean and you catch it early. Sewage backups, however, always require professional help.
Mold can start growing in as little as 24 to 72 hours, so don’t wait to start drying your bathroom.
See our water damage resources for tips and prevention habits that can help you avoid future bathroom floods.

Common Causes of a Flooded Bathroom

Before you can even begin dealing with your bathroom flood, you’ve got to figure out what’s causing the water overflow. The source usually points you toward the next right steps. So, take a breath, and work your way down the list of possible flood sources.

Toilet Overflow or Backup

A clogged toilet is one of the most common culprits when it comes to a flooded bathroom floor. If the water rises and keeps rising, or if it’s coming back up after a flush, you’re likely dealing with a blockage somewhere in the line. You might be able to fix a simple clog with aggressive plunging, but if the backup keeps happening, you might have a problem further down your plumbing line.

Tub or Shower Overflow

A clogged drain, a stuck stopper, or a family member simply forgetting to shut off a faucet can all send water spilling over the edge of your tub or shower. The silver lining here is that the water’s usually clean, which can make your cleanup a bit easier.

Pipe or Fixture Leak

Aging pipes, loose connections, or a cracked supply line under the sink can cause slow leaks that take days to notice. These same conditions can lead to a burst pipe suddenly flooding your bathroom in a minute. If you notice water on your bathroom floor, check under the sinks, behind toilets, and around your shower or tub for any signs of moisture.

Once you know the cause of the cascade in your bathroom, you’ll have a much better idea of how to handle it.

Immediate Steps to Take When Your Bathroom Floods

Once you’ve figured out what’s causing the flood in your bathroom, it’s time to act. Here are steps to help mitigate the damage to your bathroom and home.

1. Stop the Water Source

You can’t start the cleanup if water is still gushing onto your bathroom floor. So, step one is turning off the water shutoff valve. This might be located behind the toilet or under the sink. If you can’t find it, or you’re not sure where the leak’s coming from, shut off your home’s main water supply.

2. Keep People and Valuables Clear

If there’s any risk that your bathroom is soaked in contaminated water, or if the water is creating an electrical hazard, keep kids and pets out of the space. You’ll also want to remove any personal items, like rugs, towels, decorations, or anything else you can pick up and take out of the room.

3. Document the Damage

Once you’ve handled the immediate danger, take plenty of photos and videos of the affected area. This documentation will help out when it comes time to file your insurance claim. These images and videos will also give any professional you call a better idea of what’s going on.

4. Act Quickly

When it comes to a flooded bathroom floor, cleanup speed matters. Water can quickly slip under your bathroom floor tiles and soak into the subfloor. The faster you remove it, the less damage you’ll have to deal with.

Before you get to work, be sure the water is "clean" and safe for a DIY cleanup. Learn more about different water damage categories to understand why some floods need more than a DIY approach.

When to Call a Professional

Some bathroom flood situations go beyond what a mop and fan can fix. If the water looks discolored, smells bad, or you’re not entirely sure where it came from, don’t touch it. Contaminated water needs specialized extraction.

Call a water damage restoration professional if you’re dealing with:

Sewage backup of any kind
A toilet overflow involving solid waste
A soaked subfloor or wall
A lingering, musty odor (hint: it’s probably mold!)
Visible mold growth
Flooding that keeps happening
Water damage that shows up in the ceiling below your bathroom

Sewage water can carry harmful pathogens and isn’t safe for you to clean up on your own. Hire trained technicians who’ll bring the proper protective equipment, specialized extraction tools, and antimicrobial treatments to fully clean and disinfect the space.

A professional remediation team will use moisture meters to detect hidden water inside tile, walls, and subfloors that you’d never spot on your own.

How to Clean Up a Flooded Bathroom

If you’re dealing with a minor flood from a clean water source, like an overflowing tub or a small sink leak, you can likely handle cleanup yourself. How to clean up a flooded bathroom the right way:

Remove standing water: If the water’s clean, you can begin soaking it up with towels, a mop, or a wet vacuum.
Dry the area thoroughly: Open a window, run a fan, or set up a dehumidifier to get air moving through the room. Wipe down surfaces and lift any rugs or bathmats so they can dry separately.
Disinfect affected surfaces: It’s a good idea to clean your floors, walls, and any surface the water touched with a household disinfectant.
Check for hidden moisture and damage: Press on the flooring near your baseboards and check for soft spots, discoloration, or a musty smell. If you find any of these telltale signs of hidden water, or if sewage water hit any part of your bathroom, stop the DIY and call a professional.

How to Prevent a Bathroom Flood

With a little regular upkeep, you can prevent bathroom floods.

Clear bathroom drains of hair and soap buildup regularly.
Check the toilet supply line and wax ring every six months.
Never flush wipes, cotton balls, or anything other than toilet paper and waste.
Recaulk your tub, shower, and sink edges annually, and replace cracked or missing grout.
Check the supply lines under your sinks for kinks, rust, or moisture, and replace hoses every five to seven years.
Test your toilet’s shutoff valve periodically to make sure it still turns easily.
Know where your home’s main water shutoff is so you’ll be able to use it in an emergency.

SERVPRO Is Ready When You Need Help

If you catch a bathroom flood early and act right away, you may be able to handle the cleanup and drying yourself. But if sewage water is involved, it’s always better to be safe than sorry. That means calling a professional water damage team, like SERVPRO.

Our technicians have the training, experience, and equipment to handle any category of water damage, as well as mold remediation. Water should stay in the sink and tub, not your bathroom floor.

Find your local SERVPRO location today.

FAQs

What Should You Do When Your Bathroom Floods?

When your bathroom floods, turn off the water source first. Then, move people, pets, and valuables out of the room. Remove standing water quickly with towels or a wet vacuum. If the water is contaminated or has reached the subfloor, call a professional right away.

How Long Does It Take a Flooded Bathroom to Dry Out?

Drying time for a flooded bathroom depends on how much water was involved and how far it spread. You might be able to dry a minor spill within a day if you use fans and a dehumidifier. On the other hand, water that’s soaked into flooring or walls can take several days to fully dry out.

Can a Flooded Bathroom Cause Mold?

Yes. Mold can begin growing within 24 to 72 hours in damp conditions. Any moisture left behind in walls, flooring, or grout gives mold the environment it needs to spread, which is why fast, thorough drying is so important after a flood.