First Things First: Is It Safe To Go In?
Before you do anything else, pause and take care of these two very important things:
Turn off the electricity to the basement. Water and live electrical current together can be fatal. If your electrical panel is in the basement and you can't reach it safely, call your utility company to shut off the power before you attempt to go into the basement. Never just assume the circuit breakers have tripped on their own.
Check the source of the water. If the flooding came from a sewer backup or sewage line, the water is contaminated. Do not wade through it without at least waterproof boots and gloves, and call a professional before attempting cleanup. Sewage-contaminated water requires a different remediation process than groundwater or rainwater intrusion.
The First 24 Hours: What To Do Right Now
Stop Water At The Source If Possible
If your sump pump has gone silent, first check if it has lost power. Sometimes plugging it into a different outlet or circuit will get it running again. If not, a submersible utility pump can help you move water out by hand. When water keeps pouring in through cracks or along the wall and floor, and you can't stop it, focus on what you can remove and call a contractor for help.
Remove The Water
The clock is ticking once water is in your basement. For smaller amounts of water, a wet/dry shop vacuum can do the trick. If you’re facing inches or feet of water, a submersible utility pump with a discharge hose aimed at a floor drain, sump pit, or outside will move things along faster. If you don’t own one, most hardware stores have them for rent.
Whatever you do, don’t send the water back out against your foundation. It will find its way back inside.
Document Everything Before You Clean
Before moving boxes or tearing up flooring, grab your phone and document everything. Take photos and videos of the whole space, including the water level, affected materials, and any visible damage to walls, wood framing, or stored items. Your insurance company will ask for this proof, and any contractor you call will need to see what it looked like when the water was there.
Start Drying Immediately
Time is of the essence for preventing mold after flooding. In the right conditions, it can start growing on wet materials within 24 to 48 hours. As soon as you’ve removed standing water, move quickly:
- Open any basement windows if the outdoor humidity is lower than the indoor humidity
- Run fans to circulate air across wet surfaces
- Run a dehumidifier continuously
- Remove saturated rugs, cardboard boxes, and porous items that can't be dried quickly
Hold off on installing new flooring, rebuilding walls, or moving belongings back into the affected space until the basement has dried completely and the source of the water has been identified and addressed.
Call Your Insurance Company
Most homeowners' insurance policies cover sudden water damage, such as burst pipes, but exclude gradual water intrusion or flooding from external groundwater. Sewer backup may require a separate rider. Call your agent to understand coverage before hiring any contractors, and document everything.
What Needs To Happen in the Following Days
Water removal is just the beginning. The steps you take next will determine whether this is a one-time disaster or something you’ll face again.
Assess The Flood Damage
Once everything has fully dried, you can see what the flood left behind. Here’s what to look for:
- Efflorescence or staining on foundation walls that shows where water entered
- Cracks along the wall-floor joint, in block mortar seams, or running horizontally across poured walls
- Soft, discolored, or visibly wet framing lumber
- Insulation that has absorbed water and now requires removal
- Any visible mold that developed during the drying period
What you find tells you which repair process you’ll need to follow and whether it's a one-time event or a symptom of an ongoing problem.
Get The Mold Under Control
If materials stayed wet for more than 48 hours, assume mold is present even if you can't see it yet. Drywall, insulation, and wood framing that absorbed water need to be inspected and, in some cases, removed. Cleaning mold off porous materials without removing them is not remediation; it's a temporary bandaid and the mold will come back.
Surface mold on concrete can often be cleaned with appropriate products. Mold inside wall cavities, behind paneling, or in insulation requires removal of the affected material before the space can be rebuilt safely.
Why Did Your Basement Flood?
A flooded basement repair in NY that doesn't address the cause of the flooding is going to be a temporary fix. The most common causes of basement flooding in Rochester and the Finger Lakes region include:
Sump pump failure. The pump stopped running due to a power outage, a failed float switch, a worn-out motor, or a pump that wasn't rated for the volume of water from a major storm. This is the most common cause of basement flooding in homes that already have a waterproofing system in place.
Hydrostatic pressure. Groundwater saturation in the surrounding soil pushes against the foundation from multiple directions. Water finds every available path to get through, including hairline cracks, porous block, and the cold joint where the wall meets the floor.
Foundation cracks. Cracks from freeze-thaw movement, settling, or wall stress allow water to enter directly. Cracks that have let in water once will likely let in water again.
Drain or sewer backup. Floor drains that back up during heavy rain events bring water in from the municipal system rather than the exterior. These need to be addressed separately from groundwater-related flooding.
Inadequate or failed waterproofing. Homes with older waterproofing systems (or no waterproofing at all) are vulnerable during significant rain events and spring snowmelt regardless of whether anything visibly broke.
When To Call a Professional Basement Waterproofer
Call a waterproofing or foundation contractor when:
- You had a sump pump, but it still flooded
- Water entered through the walls, floor joint, or foundation cracks
- The basement has flooded before
- You’re unsure where the water came from or why
- You're planning to refinish the basement after cleanup
It’s important to thoroughly assess your basement after a flood to learn what your home’s current waterproofing system can handle, what it can’t, and what you’ll need to do to prevent basement flooding from happening again.
Long-Term Basement Waterproofing
Flooded basement cleanup removes the water. Flooded basement repair in NY addresses structural and waterproofing issues that allow water to enter and flood in your basement. Preventing basement flooding from happening again requires both flood cleanup and flood repair.
For most Rochester-area homes, a complete solution includes a combination of:
Interior drainage at the footer. A perimeter drainage channel at the base of the foundation wall intercepts groundwater before it builds pressure or enters the space. This is the core of most interior waterproofing systems and handles the hydrostatic pressure that causes most basement flooding in this region.
A properly sized sump pump with battery backup. If the flood happened because the pump failed during a power outage, the solution is a new pump and a battery backup system. The GrateSump Plus and GrateSump Plus II systems include battery backup that activates automatically when the primary pump loses power, so a storm that knocks out electricity doesn’t also disable your flood protection.
Foundation crack repair. Cracks that let water in need to be sealed, and the waterproofing system needs to be able to handle pressure that continues after repair.
A dehumidifier rated for the space. Once the immediate water problem is resolved, controlling humidity prevents slow moisture damage that causes mold, wood rot, and air quality issues throughout the home.
The right fix depends on what caused your flood, how your house was built, and what’s already in place to keep water out. An in-person assessment will give you a clear picture.
STORM Serves Rochester and the Finger Lakes for Flooded Basement Repair
STORM Basement Waterproofing is here for homeowners in Rochester and the Finger Lakes, whether you need a cleanup assessment, a new drainage system, a sump pump replacement, or full foundation waterproofing. If your basement has flooded, we’ll help you figure out why and show you exactly what it takes to prevent it from happening again.
Book your free estimate today.
Or start with a virtual assessment if you want an initial read before scheduling an in-person visit.
Frequently Asked Questions
What should I do first if my basement floods? Cut power to the basement before entering. Confirm the water source is safe to approach. Then remove standing water as quickly as possible using a sump pump, submersible utility pump, or wet/dry vacuum. Document damage with photos before cleaning, and begin drying immediately with fans and a dehumidifier.
How long does flooded basement cleanup take? Removing standing water can happen in hours. Drying the space thoroughly, including all walls, framing, and concrete, and dehumidifying the air, typically takes several days to a week, depending on the volume of water and quality of airflow. Mold risk starts within 24 to 48 hours, so the drying process needs to start immediately.
Does homeowners insurance cover a flooded basement? It depends on the cause and your policy. Sudden damage from a pipe burst is often covered. Groundwater flooding and sewer backup typically require separate coverage. Contact your insurance company before beginning repairs and document all damage before cleanup.
What causes basements to flood in Rochester, NY? The most common causes are sump pump failure during storms, hydrostatic pressure forcing groundwater through foundation cracks and seams, and inadequate or aging waterproofing systems. Spring snowmelt and the region's clay-heavy soil make Rochester-area homes particularly prone to basement flooding.
How do I prevent my basement from flooding again? The right prevention depends on the cause. Most Rochester homes benefit from an interior drainage system at the footer, a properly sized sump pump, a battery backup system, and in some cases foundation crack repair. A professional assessment after a flood is the most reliable way to identify what your specific home needs.