Spring is an exciting time of year, but for pool owners, it can bring certain challenges. One common issue? Floating pool liners. While April showers might bring May flowers, they can also lead to rising groundwater levels, which, in turn, can cause your pool liner to “float.” But don’t worry—understanding the causes and solutions can help you keep your pool in perfect shape.
What is a Floating Pool Liner?
A floating pool liner occurs when water builds up behind the vinyl liner of your pool, causing it to lift or bubble. This happens when the concentration of groundwater around your pool becomes greater than the water inside your pool.
It can be alarming to see, especially if it’s your first time dealing with this issue. However, the fix is straightforward: you need to remove the water from behind the liner. Before jumping to repairs, though, it’s important to understand why this happens in the first place.
Causes of Floating Pool Liners
Water behind the liner typically comes from one of two sources:
- Water leaking from the pool itself.
- Groundwater rising from the surrounding area.
Groundwater levels can change over time due to various factors:
- Heavy rains or snowmelt
- Development in your neighbourhood that impacts drainage
- Extended droughts followed by moderate rainfall, which can change how the soil absorbs water
Even if you’ve owned your pool for years without issues, fluctuating groundwater levels can suddenly cause problems.
To identify the source of the water, start by checking your pool’s water level. If it’s unusually low, the water behind the liner may be leaking from the pool. You can also test the water behind the liner for chlorine using a test strip—if it contains chlorine, it’s likely pool water.
When is Your Pool Most at Risk?
The period between fall and spring is the riskiest for floating liners. During this time:
- Pools are often closed with lower water levels.
- Rain and snowmelt can saturate the ground around the pool.
This combination creates the perfect conditions for a floating liner. Luckily, there are steps you can take to prevent it.
How to Prevent a Floating Pool Liner
1. Maintain Your Sump Pit
A sump pit is a crucial tool for managing groundwater around your pool. It collects excess water and pumps it away from the pool area.
- Use a submersible pump with an auto shut-off float for easy maintenance. This type of pump activates automatically when water levels rise and shuts off when the sump pit is empty.
- If your pool doesn’t have a sump pit, consider adding one during your next renovation or liner replacement.
2. Manage Your Winter Pool Cover
Pools with traditional tarp or vinyl lock-in winter covers are more vulnerable to floating liners. Here’s why: when you pump water off the cover, you reduce the weight inside the pool cavity, making it easier for groundwater to push the liner upward.
- Wait to drain water off the cover until the ground around the pool has dried or after maintaining your sump pit.
- Fill the pool under the cover until it’s nearly full before removing water from the cover. This helps balance the water inside the pool with the groundwater outside.
3. Consider a Safety Cover
Safety covers are a game-changer for preventing floating liners. Unlike traditional covers, they allow rain and snowmelt to pass through and refill the pool naturally.
- By spring, your pool will be closer to its normal operating level, reducing the risk of a floating liner.
- Bonus: You’ll save water and money by not having to top off the pool with your garden hose!
What to Do if Your Pool Liner is Floating
If you notice your liner floating, don’t panic. The first step is to remove the water from behind the liner. This process may require professional help, so don’t hesitate to reach out to experts for assistance.
At Aqua-Tech, our technical solutions team is ready to help you tackle any pool liner issues. Visit www.findmyanswers.ca to get in touch with our team.
Keep Your Pool in Great Shape…Preventing and fixing floating liners doesn’t have to be overwhelming. With regular sump pit maintenance, smart cover management, and proactive planning, you can enjoy a worry-free pool season. And if you ever need help, Aqua-Tech is here to support you every step of the way.
