Checkout the video below. Basement flooding can cause big problems for homeowners, from damage to health issues. Luckily, spotting the early signs of potential basement flooding can help you act before it’s too late.



Whilst in most cases flooding can be predicted, often and especially with the increase of rainfall here in New Zealand,  flash floods are becoming more common. Homes that have never flooded before are experiencing first-time events. Why is that and is there a way to identify whether your home could be next?

Unlike European countries, when we refer to a “basement” here in New Zealand, we refer to any area of the house that is below the outside ground level. 

If you can identify cracks in the concrete or block walls, it is very likely this is the effect of water finding its way into areas it shouldn’t. 

Let’s review some indicators.

1. Musty Odor

If your basement starts to smell musty and damp, it may be a sign of excess moisture and potential water infiltration.

2. Cracks in the Foundation

Inspect your basement’s foundation for visible cracks. These cracks can let water seep in and eventually lead to flooding.

3. Water Puddles Outside

Water collecting around your home’s foundation after rain can find its way into your basement. Proper drainage and grading can help prevent this.

4. Damp or Stained Walls

Damp or stained walls in the basement indicate moisture getting in. These stains can worsen and suggest possible flooding.

5. Blocked or Overflowing Gutters

Clogged gutters can cause water to overflow and enter your basement. Keep your gutters clean and well-maintained.

6. Sump Pump Problems

If your sump pump isn’t working correctly, it can’t remove water effectively. Regularly check your sump pump to ensure it’s in good working condition.

7. High Water Tables

Areas with high water tables are more prone to basement flooding. Understanding local groundwater levels can help you prepare better. Be proactive and check your home’s LIM report to identify whether your home is subject to Flow Paths or Flooding zones. If this is the case, Drainage NZ can help you be prepared for such an event before it’s too late. 

9. Rising Utility Bills

Sudden increases in water and energy bills may indicate hidden leaks or water infiltration that could lead to flooding.

10. Water Stains or Peeling Paint

Concrete block calcification, water stains or peeling paint along basement walls suggest water intrusion. We can investigate the source to prevent this. This includes treatment of block work and timber. 

11. Unusual Sounds

Strange noises like gurgling drains can be early signs of drainage blocking, which can lead to basement flooding if not addressed. Get drain unblocking service right away to avoid extensive damage. 

12. Condensation on Windows

Excess condensation on basement windows can indicate high humidity, contributing to basement moisture and potential flooding.

13. Changes in Landscaping

Noticing major changes in your landscaping, like slopes toward your home, may direct water toward your foundation, increasing the risk of basement flooding.

14. Weather Patterns

Stay informed about local weather forecasts, especially during heavy rain or snowmelt periods, which can increase the risk of flooding.

15. Health Symptoms

Many underestimate the effects of long term exposure to non visible water problems. 

Increased allergies or respiratory issues can indirectly indicate moisture and mould growth in your basement, often linked to flooding or water ingression.
Recognizing these early warning signs is the first step in preventing flooding or long term damage. Regular checks, maintenance, and swift action are vital to safeguard your home from this costly and stressful issue. By staying alert and taking necessary precautions, you can significantly reduce the risk of basement flooding and its related problems. If you need help with assessing these early signs, don’t hesitate to contact us!