What to Do After a Flooded Basement: How to Restore Your Home

Posted March 5, 2025

A flooded basement is one of the most stressful situations a homeowner can face. Whether caused by heavy rain, a burst pipe, or a sewer backup, quick action is essential to minimize damage and prevent long-term issues like mould and structural deterioration.

This guide will walk you through exactly what to do after a basement flood, whether you should attempt cleanup yourself, how to navigate insurance, and why professional restoration is often the best route to take.

Immediate Steps to Take After a Flooded Basement

Time is critical when dealing with water damage. The faster you act, the less damage and expense you will face. Here is what to do first:

1. Prioritize Safety – Water and electricity are a dangerous mix. If there is standing water, avoid the basement until you can safely turn off power to the affected area. If the flood is due to a sewer backup, wear protective gear to avoid contamination.
2. Identify the Source – Stop further water from entering by shutting off the main water supply if the flooding is due to a burst pipe. If it is external flooding or a sewer backup, call a plumber or restoration specialist immediately.
3. Document the Damage – Before moving anything, take clear photos and videos for insurance purposes. Insurers require proof of damage before approving claims.
4. Start Water Removal – If safe, begin removing standing water using a sump pump or wet/dry vacuum. However, if the flooding is extensive or involves contaminated water, it is best to call a professional restoration company.
5. Increase Ventilation – Open windows, run fans, and use dehumidifiers to reduce moisture levels and prevent mould growth.

The longer water sits, the worse the damage will be. Taking these immediate steps can save you thousands in repairs.

Should You Clean a Flooded Basement Yourself?

The ability to clean up a flooded basement yourself depends on several factors, including the source of the water, the extent of the flooding, and the materials affected.

When You Can Handle It Yourself:

• The water is from a clean source, such as a burst supply pipe or a leaking appliance.
• It covers a small area and has not saturated walls, insulation, or flooring.
• There is no visible mould growth or strong odour.
• You have the proper tools—wet/dry vac, dehumidifier, fans, and protective gear.

When to Call a Professional:

• The water is from an unsanitary source, such as sewage, stormwater, or groundwater.
• The flooding has affected walls, insulation, or subflooring, which can trap moisture and lead to structural damage.
• Mould is present or could develop due to prolonged dampness.
• You need insurance documentation to support a claim.
• The floodwater has been standing for more than 24 hours, increasing the risk of contamination and material deterioration.
• There is a strong or unusual odour indicating bacteria, mildew, or chemical contamination.
• The HVAC system has been exposed to floodwater, which could spread contaminants throughout the home.

Professional restoration companies use advanced drying equipment, moisture detection tools, and antimicrobial treatments to ensure thorough cleanup. If not handled properly, hidden water damage can lead to mould growth, weakened structures, and persistent odours.

Factors That Impact Basement Flood Cleanup Costs

Basement flood cleanup costs vary widely depending on several factors, including:

• The Extent of Water Damage – The more water that has infiltrated walls, flooring, and structural components, the more costly the restoration.
• Type of Water Involved – Clean water is easier and less expensive to clean up than grey water (from appliances) or black water (from sewage backups or floodwater).
• Mould and Contamination Risks – If water sits for too long, mould remediation and hazardous material removal can drive up costs.
• Structural Repairs Required – If drywall, insulation, or flooring needs replacement, the costs will rise.
• Labour and Equipment Needs – Larger jobs require industrial dehumidifiers, air movers, and specialized drying techniques.
• Insurance Coverage – Some costs may be covered by your insurance policy, depending on the cause of the flood and your policy terms.

Because every situation is unique, it is best to get an assessment from a professional to understand the full scope of damage and potential costs.

Will Insurance Cover a Flooded Basement?

Insurance coverage depends on what caused the flood. In Canada, most standard home insurance policies do not cover flooding from external water sources (such as overland flooding from heavy rain) unless you have specifically purchased overland flood insurance. Here is how different causes are typically covered:

• Sewer Backup: Requires an optional sewer backup endorsement on your policy.
• Overland Flooding: Must be added as an endorsement and may not be available in high-risk areas.
• Burst Pipes: Typically covered if the homeowner has maintained their plumbing and heating.
• Groundwater Seepage: Usually not covered unless explicitly stated in the policy.

To avoid surprises, review your policy with your insurer and consider adding extra coverage if you live in a flood-prone area.

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

Drying times depend on the severity of the flooding and how quickly mitigation begins. Here is a general breakdown:

• Minor water exposure: 1-2 days with good ventilation and drying equipment.
• Moderate flooding: 3-7 days, requiring dehumidifiers and industrial air movers.
• Severe flooding: 7-14+ days if structural drying is needed.

Hidden moisture behind walls and under flooring can cause issues even after the surface appears dry. A professional moisture assessment can confirm when it is safe to begin repairs.

Why Professional Restoration Services Are Essential

Hiring a professional restoration company ensures that:

• All moisture is removed – Hidden dampness behind walls and under flooring is properly addressed to prevent long-term damage.
• Mould is prevented – Professionals use antimicrobial treatments and proper ventilation to stop mould growth before it starts.
• The structural integrity of your home is preserved – Water exposure weakens materials, leading to expensive repairs down the road if not properly dried and treated.
• You receive proper insurance documentation – Restoration companies provide detailed reports and estimates that support insurance claims, ensuring smoother processing.
• Health risks are minimized – Exposure to contaminated water can pose health hazards, and professionals are trained to handle hazardous materials safely.
• Advanced drying technology is used – Industrial-grade dehumidifiers, air movers, and moisture meters ensure thorough drying, preventing hidden water damage.
• Odour control and sanitization are included – Lingering odours and bacteria can be eliminated with specialized disinfectants and air purifiers.

Investing in professional restoration services ensures that the problem is fully resolved and that your home remains safe and structurally sound.

Preventing Future Basement Flooding

Flood prevention strategies include:

• Install a sump pump with a backup battery – This prevents water from pooling in your basement during heavy rains.
• Maintain gutters and downspouts – Direct water away from your home’s foundation to reduce seepage.
• Ensure proper grading around your home – Water should flow away from your foundation, not toward it.
• Install a backwater valve – This prevents sewage from backing up into your basement during storms.
• Seal foundation cracks – Even small cracks can allow water intrusion over time.
• Regularly inspect plumbing and appliances – Catch leaks early before they become major problems.

EMRG Canada: Reliable Help When You Need It Most

A flooded basement is overwhelming, but finding the right help should not be. EMRG Canada takes the guesswork out of restoration by connecting you with trusted contractors across Canada who are ready to respond fast. From water damage cleanup to full-scale restoration, EMRG ensures the job is done right—quickly, safely, and with your best interests in mind.

When your property is on the line, you need more than just a service—you need a team that works for you. One call gets you expert help, real solutions, and peace of mind.

EMRG Canada – In Your Neighbourhood, From Coast to Coast. For 24/7 flood damage restoration service, contact us at 1-844-344-3674.