How to Disinfect Your Basement After a Flood the Right Way

When your basement floods—whether it’s from heavy rain, a sump pump failure, or a burst pipe—it’s not just water you're dealing with. You’ve now got the perfect conditions for mold, bacteria, and other harmful contaminants. Disinfection after a basement flood isn’t just important—it’s essential.

Here’s exactly how we at Total Home Water Restoration do it, and how you can too (or what to look for when hiring a pro).

Step 1: Remove the Water and Debris

Before you can clean, you’ve got to clear the space.

• Use a sump pump or wet/dry vac to remove standing water.

• Shovel out heavy mud if needed.

• Get rid of soaked carpet, drywall, and insulation—especially if it's been wet for over 24 hours.

Pro Tip: If you're dealing with sewage (Category 3 water per IICRC S500 standards), this is a job for professionals.

Step 2: Dry It Out—Fast

Drying is critical. Mold can start growing in as little as 24-48 hours.

• Run dehumidifiers and fans continuously.

• Open windows and doors for ventilation when weather permits.

• Pull off baseboards and drill weep holes in drywall to help air circulate behind the walls.

Step 3: Clean Surfaces Thoroughly

Once everything is dry, scrub surfaces with a heavy-duty cleaner.

• We use commercial-grade detergents recommended by the IICRC.

• For non-porous materials like concrete and tile, scrub with hot water and detergent.

• Wood framing or subfloors? Clean them, then follow up with a disinfectant.

Step 4: Disinfect with an EPA-Registered Product

This is where many homeowners stop—but disinfection is crucial.

• Use an EPA-registered disinfectant that's labeled effective against bacteria and viruses.

• Spray thoroughly on all hard surfaces, including floors, walls, and exposed framing.

• Allow proper dwell time per the label (usually 10 minutes minimum).

We follow IICRC S520 and EPA guidelines to ensure proper application. If it’s safe and approved for flood remediation, we use it.

Step 5: Monitor for Mold

Even with disinfection, keep an eye on things.

• Look for new smells or discoloration.

• Consider professional mold testing if you notice changes or had more than 48 hours of moisture.

• In some cases, antimicrobial coatings may be applied to prevent regrowth.

When to Call in a Pro

If the water was contaminated (sewage, groundwater), or the damage is widespread, don’t risk your health. Call in a certified pro who understands microbial remediation and has the right gear.

Frequently Asked Questions

What disinfectant should I use after a flood?
Use an EPA-registered disinfectant that targets bacteria, viruses, and fungi. We use commercial products that meet IICRC standards for flood damage.

Is bleach good for disinfecting a basement?
Not really. Bleach can irritate lungs, damage materials, and isn’t as effective on porous surfaces. Stick to professional-grade disinfectants.

How long does it take to disinfect a flooded basement?
A few hours to a few days, depending on size, water category, and how much needs to be removed.

Need Help in Central Ohio?

Total Home Water Restoration is based in Grove City and services the Columbus area—Hilliard, Dublin, Westerville, Pickerington, and beyond.

We handle disinfection the right way: fast, safe, and thorough.

📍 Total Home Water Restoration
4141 Hoover Rd, Grove City, OH 43123
📞 380-246-1837