What To Do If Your Backyard Has Flooded

A flooded backyard can feel overwhelming — especially after a heavy rainstorm or rapid snowmelt. Seeing standing water near your home naturally raises concerns about your foundation, basement, and long-term damage.

The good news? In many cases, quick action can reduce immediate risk. And when flooding keeps happening, there are permanent solutions that protect your home properly.

If your backyard has flooded, here’s exactly what to do, and when to call a professional.

Table Of Contents:
What To Do Immediately
When To Call a Professional
Short-Term Solutions
Long-Term Protection
Why Backyard Flooding Is So Common

What To Do Immediately If Your Backyard Is Flooded

Before jumping into fixes, start with a calm assessment. Not all standing water is an emergency, but some situations shouldn’t be ignored.

1. Check for Immediate Safety Risks

Walk around your property carefully and look for:

• Water pooling directly against your foundation walls
• Water collecting in window wells
• Water approaching basement vents
• Sewer smells or water backing up from floor drains/outdoor drains
• Water near outdoor electrical outlets, garages, or sheds

If you suspect sewer backup (bad odour, gurgling drains, water coming up through a drain), avoid using plumbing fixtures until it’s assessed.

2. Stop Additional Water

Often, backyard flooding gets worse because water continues flowing into one low spot.

You can reduce incoming water by:

• Extending downspouts so roof water exits at least 2 metres (6+ ft) from the foundation
• Checking gutters for overflow (if gutters spill over, water dumps right beside your home)
• Moving snow piles away from foundation walls (they melt into the ground beside the house)
• Creating a temporary “berm” (a small ridge of soil) to steer water away from the foundation
• Using sandbags only if water is actively flowing toward doors/window wells

Important: don’t redirect water onto a neighbour’s property.

3. Monitor How Long the Water Stays

• Water that drains within 12-24 hours may be surface runoff.
• Water that remains longer than 24 hours often points to a drainage or grading issue, compacted soil, or water collecting from downspouts/sump discharge.

When Should You Call a Professional?

Call a waterproofing specialist if:

• Water is within 1-2 feet of your foundation
• You notice basement leaks
• You notice cracks actively leaking
• Standing water lasts longer than 24 hours
• Flooding happens repeatedly after storms
• You smell sewage or see water backing up from drains

At DGI Waterproofing, we offer a same-day response for active flooding. The goal isn’t just to remove water, it’s to find the cause and prevent it from coming back.

Short-Term Solutions to Reduce Standing Water

These steps can help reduce pooling right away. They won’t fix deeper drainage issues, but they can protect your foundation while you assess the situation.

1. Redirect Downspouts Properly

Roof water is one of the most common causes of backyard flooding.

Make sure:

• Downspouts extend at least 2 metres (6+ feet) away from your foundation
• Water isn’t dumping into a low spot in your yard
• Gutters are clear and not overflowing beside the house

If large volumes of roof water discharge into one small area, that spot will eventually flood.

2. Improve Surface Drainage

Surface drainage simply means helping water move across your yard instead of sitting in one place.

Here’s what to check:

• Low spots: After rain, identify exactly where water pools. If the area dips like a bowl, water will collect there.
• Obstructions: Garden edging, patios, fence lines, or raised landscaping can block water from flowing away.
• Minor grading issues: If the ground slopes slightly toward your house, water will naturally move in that direction.

For minor issues, you can:

• Add soil to small low spots and gently slope it away from the house
• Create a shallow path (a small groove in the soil) to guide water toward a safer drainage area
• Remove small barriers that trap runoff

If water still sits longer than 24 hours after rainfall, the issue likely goes deeper than surface grading.

3. Reduce Soil Compaction (For Mild Cases)

If your lawn feels hard and water beads on top instead of soaking in, the soil may be compacted.

You can:

• Aerate the lawn to allow water to penetrate
• Avoid heavy foot traffic on saturated ground

This can improve drainage slightly, but it will not solve major pooling near foundations.

4. Temporary Pumping (If Water Is Approaching the Home)

If water is actively moving toward your foundation, temporary pumping may be used to move it away. This is an emergency measure, not a long-term solution.

This typically involves using a small submersible utility pump placed in the deepest part of the flooded area to move water away from the house and discharge it to a safe drainage location.

Long-Term Protection: How To Prevent Backyard Flooding for Good

If your backyard floods more than once, it usually means the yard isn’t draining properly, or water is collecting around your foundation. Short-term fixes can help temporarily, but long-term protection focuses on controlling where water goes and keeping it away from your home.

Here are the most common permanent solutions.

1. Professional Yard Regrading

Regrading means reshaping the slope of your yard so water naturally flows away from your home instead of toward it.

Over time, soil settles. Landscaping changes. Additions get built. Even small shifts in slope can create areas where water collects like a bowl.

Regrading restores a gentle slope so rainwater spreads out and drains safely instead of pooling near your foundation.

2. French Drains & Yard Drainage Systems

A French drain is an underground drainage system that collects excess water and redirects it away from problem areas.

It typically includes:

• A narrow trench filled with gravel
• A perforated pipe inside the trench
• A safe discharge point where water exits away from the home

If your yard floods because water has nowhere to go, a drainage system gives it a controlled path. Instead of sitting on the surface, water is captured and carried away.

This is especially effective in clay-heavy areas where water doesn’t soak in easily.

3. Exterior Waterproofing (Complete Foundation Protection)

If water consistently collects near your foundation, the issue may not just be surface drainage, it may be that your foundation walls are vulnerable to water pressure.

Exterior waterproofing involves:

• Excavating around the outside of your foundation
• Repairing any cracks found during the process
• Installing a waterproof membrane to block moisture
• Replacing or upgrading the weeping tile system
• Backfilling with proper drainage material

This system stops groundwater from entering your home and relieves pressure around the foundation, protecting both your basement and the surrounding soil.

At DGI Waterproofing, our exterior waterproofing systems include up to a 25-year warranty for long-term peace of mind.

4. Interior Waterproofing & Sump Pump Systems

In some homes, exterior excavation isn’t practical, or additional protection is needed.

Interior waterproofing systems collect water that enters along the foundation and direct it to a sump pump system.

A sump pump:

• Sits in a pit at the lowest point of the basement
• Automatically activates when water levels rise
• Pumps water safely away from the home

For properties in flood-prone areas, a sump pump with battery backup ensures protection even during power outages.

Instead of allowing water to build up and cause damage, these systems manage it safely and prevent basement flooding.

If your backyard flooding is recurring, the right long-term solution depends on your soil type, grading, foundation condition, and drainage design.

That’s why professional assessment is important, so you address the real cause, not just the symptoms.

Why Backyard Flooding Is So Common

Understanding why this happens locally helps explain why quick fixes often fail.

1. Clay-Heavy Soil

Much of Toronto and the GTA sits on dense clay soil. Clay drains slowly, meaning water lingers longer on the surface and around foundations.

2. Downspout Disconnection Rules

To reduce sewer overload, many homes now discharge roof water onto the property rather than into the storm sewer. While this protects infrastructure, it increases yard saturation if drainage isn’t properly designed.

3. Aging Drainage Systems

Many homes in the GTA were built decades ago. Original weeping tiles deteriorate over time. Some older homes lack sump pumps entirely.

Modern rainfall patterns are more intense than when many of these systems were installed.

4. Increasing Extreme Rainfall

Southern Ontario has experienced heavier one-day rain events over recent decades. Systems designed 40-50 years ago often weren’t built for today’s storm intensity.

This is why recurring backyard flooding should never be ignored.

Don’t Ignore a Flooded Backyard

A flooded backyard is often the first warning sign of a larger drainage issue.

Sometimes it’s temporary surface runoff. Other times, it’s early evidence of foundation pressure, failing drainage systems, or inadequate slope.

Acting early protects:

• Your foundation
• Your basement
•  Your landscaping
• And your long-term property value

If your backyard has flooded and you’re unsure what’s causing it, a professional assessment can give you clarity… and a plan.

DGI Waterproofing serves Toronto and the entire GTA, providing same-day flooding response when needed and long-term protection you can trust.