Keeping a swimming pool is a luxury that brings joy, relaxation, and even property value. However, it also comes with responsibilities—regular cleaning, chemical balancing, maintenance, and yes, even covering the pool when not in use.
Many pool owners wonder if it’s really necessary to keep their pool covered during periods of non-use. Should you cover your pool every time you’re not swimming? Are there different types of covers with different benefits? In this comprehensive guide, we will explore all the factors you should consider when making the decision to cover your pool and how it affects cleanliness, safety, cost efficiency, and overall longevity.
Whether you own an in-ground or above-ground pool, this article will help you make an informed choice.
Why Covering Your Pool Makes Sense
The debate over whether to cover a pool when not in use often circles around convenience, time, and aesthetics. However, the benefits of covering your pool go far beyond merely keeping the water clean. Here’s why it makes sense to cover your pool when it isn’t in use:
1. Keeps Debris Out
Leaves, pollen, dirt, insects, and even animals find pools highly attractive. A covered pool significantly reduces the amount of debris that enters your water, which in turn reduces the need for frequent cleaning. This is especially important in the fall season when trees shed leaves more aggressively.
| Pool Condition | Filter Run Time | Cleaning Frequency |
|---|---|---|
| Uncovered pool | 14–16 hours/day | Daily |
| Covered pool | 8–10 hours/day | 2–3 times a week |
Pro Tip: A leaf canopy or fine mesh cover is ideal for seasonal debris control.
2. Retains Heat and Reduces Energy Costs
For pools equipped with heaters, covering the pool retains heat and can reduce heating costs by up to 70%. Heat loss often occurs due to evaporation, and pool covers act as a barrier that keeps thermal energy inside the water.
This is particularly beneficial for owners who use solar pool covers, which not only absorb heat from the sun but also keep it trapped in the pool overnight.
3. Reduces Water Evaporation
Even if you don’t heat your pool, evaporation can lead to significant water loss. Covering your pool prevents water molecules from escaping into the air, reducing the frequency of water refills and conserving a valuable resource. In hot, arid climates, this benefit becomes even more significant.
The Impact of Pool Covers on Chemical Efficiency
Properly maintaining the chemical balance of your pool is crucial for both hygiene and equipment longevity. However, several environmental factors—such as UV exposure, temperature changes, rain, and debris—can degrade chlorine and other sanitizers.
1. UV Exposure Degradation
Chlorine, particularly free chlorine, is highly sensitive to sunlight. Ultraviolet rays from the sun break down chlorine molecules before they can perform their sanitizing function. A pool cover can significantly reduce UV exposure, allowing chlorine to last longer and work more efficiently.
2. Reduces Algae Growth
Algae thrive in warm, sunny water. A pool cover blocks sunlight, limiting the photosynthesis that algae need to grow. Coupled with a stable chemical balance, this makes it harder for algae to bloom in your pool unexpectedly.
Types of Covers that Help With Algae Prevention:
- Solar blanket
- Solid safety covers
- Automatic roller covers
3. Lowers Chemical Costs
Since your pool loses chemical efficiency faster when exposed, you’ll find yourself adding more chlorine, algaecide, and pH balancers more frequently. A cover slows this process, making the pool cheaper to maintain.
Safety: Why Covering Your Pool Is a Lifesaver
Perhaps the most compelling reason to always cover your pool when it’s not being used is safety. Pool covers can be a valuable asset in preventing accidental drownings and unauthorized access to dangerous water.
1. Keeps Children and Pets Out
According to the Centers for Disease Control and Prevention (CDC), drowning is a leading cause of unintentional injury death for children ages 1–14, and backyard pools are the most common site for drowning among children younger than 5 years. A properly secured safety cover can help prevent these tragedies.
The American Red Cross Offers the Following Advice:
- Proper fencing around the pool
- Secure, lockable covers when the pool is closed for the season
- Adult supervision when swimming is occurring
2. Safety Cover Types
Not all pool covers are created equal. While a standard solar cover won’t support the weight of a person, a safety cover will.
Types of Safety Covers:
– Mesh safety covers – Allow water to drain through but prevent people/pets from entering.
– Solid safety covers – Do not allow water through, require a pump for standing water removal, and provide full protection from entry.
Types of Pool Covers and Their Uses
Understanding the various pool cover types can help you choose the best one for your needs, climate, and usage pattern.
1. Solar Covers
Solar covers, often called “solar blankets,” are made of UV-stabilized polyethylene material with a bubble design. They float on the water’s surface and act like insulation, preventing heat loss while simultaneously warming the water via sunlight.
Pros:
– Reduces water evaporation
– Cuts chemical loss
– Heat retention
Cons:
– Must be removed for swimming
– Can tear over time
2. Safety Covers
Designed to bear weight and prevent entry, safety covers are usually mandatory in areas with pool fence laws and are often installed tightly around the edges using anchors and support cables.
Pros:
– Provides physical safety barrier
– Works as a debris barrier
– Long lifespan
Cons:
– Slightly more complicated setup
– Pricey, particularly mesh or solid safety covers
3. Winter Covers
If you live in a climate that experiences cold winters, you’ll likely have to shut down your pool for a few months. Winter covers are thick tarp-like sheets secured with water bags or covers ties.
Pros:
– Protects pool during inactive months
– Prevents freeze damage
– Durable and inexpensive per square foot
Cons:
– Needs full pool winterization first
– Can tear from wind or snow
4. Automatic Safety Covers
These are built-in, motorized covers that are rolled out and retracted with a switch. They are especially popular in commercial pools or homes focused on aesthetics and safety.
Pros:
– High safety
– Custom fit
– Easy operation
Cons:
– High cost
– Professional installation required
5. Leaf Covers Canopy and Mesh Covers
Not all pool covers are laid directly on the water. Some owners prefer frame-mounted leaf covers or mesh domes that stretch over the pool surface during the off-season, particularly in fall.
Pros:
– Prevents large debris from falling in
– Allows sunlight in for swim-ready water
– Removable
Cons:
– Not for daily use
– Additional hardware required
Cost Efficiency and Long-Term Savings
Pool ownership comes with both time and financial commitments. Smart owners understand that investing in proper tools — like covers — results in long-term savings.
1. Water Conservation
Covered pools lose significantly less water to evaporation. The U.S. Department of Energy estimates that covering a pool during non-use periods can cut water loss by 30% to 50%. Reduced water usage can lower your water bill and reduce the need for chemical top-offs.
2. Energy Savings
If you heat your pool using a gas, electric, or solar heater, covering the pool can cut energy loss dramatically. In cold nights and windy climates, the cover prevents heat from escaping, which reduces how hard your heater needs to run—and that lowers your power costs.
3. Chemical Savings
As already explained, without a cover, you’re replacing and rebalancing chemicals far more often. A cover slows chemical breakdown, saving money and maintaining consistent water quality.
4. Maintenance Labor Reduction
Frequent skimming, vacuuming, and filter backwashing are all part of the weekly pool routine. Covering the pool when not in use reduces the amount of manual labor involved in these tasks significantly.
When Not to Cover Your Pool: Considerations and Exceptions
Just because covering has clear benefits doesn’t mean it’s always the best solution. There are situations where you may temporarily skip the cover or use alternatives.
Heavily Used Pools
If your pool is in constant use—daily or even multiple times a day—covering and uncovering may become a hassle. In this case, a quick daily skim and regular cleaning may suffice. However, even active pools benefit from overnight covers to prevent nighttime debris and energy loss.
Automatic Pool Cleaners
Some pools have robotic or automatic floor sweepers that clean debris regularly. If you have a system that runs continuously, you might think that covers are unnecessary. However, the amount of debris that could have entered the water if left uncovered affects the life and effectiveness of automated systems.
Climate Conditions
In places where heavy rains are frequent, covering the pool can lead to water accumulation on the cover itself, especially with solid covers. This is why mesh covers are preferred in rainy climates. Also, using a cover on windy days requires securing systems to prevent the blanket from blowing off or getting torn.
How to Choose the Right Pool Cover
There is no one-size-fits-all cover for every pool and owner. Your decision should depend on your swimming schedule, climate, budget, and safety requirements.
Step 1: Assess Your Usage Pattern
- Daily Use? You’ll prefer a solar blanket or automatic cover.
- Weekend Use Only? A standard solid or mesh safety cover might work fine.
- Seasonal Closure? Winter covers are ideal.
Step 2: Consider Your Climate
- Year-Round Swimming? Stick with safety covers and thermal blankets for energy savings.
- Snow or Cold Winters? Winter pool covers and safety covers are essential.
- High Sunlight Areas? UV-resistant covers prevent degradation over time.
Step 3: Evaluate Safety Concerns
- Children or Pets Around? A safety cover should be part of your safety strategy.
- Commercial Pool? Regulations and liability require a safety cover.
Step 4: Plan Your Budget and Lifestyle
- Limited Budget? Go with a solar blanket to start with.
- High Value on Convenience? Explore automatic cover systems.
- Want to Cut Maintenance? Choose a durable safety cover.
Proper Pool Cover Maintenance and Care
Even the best pool covers degrade over time if not cared for properly. A few regular maintenance practices can double their lifespan.
1. Regular Cleaning
You should clean your pool cover weekly by brushing off debris and rinsing with clean water. For heavy accumulations of pollen, algae, or dirt, use a soft cloth and mild pool cover cleaner.
2. Proper Storage
When not in use—particularly during peak pool months—store your cover off the water, preferably in a dry, shaded place. Fold or roll it to avoid creases, and ideally in a storage bag to protect it from UV exposure and pests.
3. Periodic Inspection
Check for rips, tears, or material degradation monthly. Also, inspect the strapping and anchors for safety covers for signs of wear.
Conclusion: The Decision to Cover Can Save You More Than Water
So, should you keep your pool covered when not in use? The answer is a resounding yes. The many advantages—from safety to cost savings, cleanliness to heat retention—make the small effort of covering well worth it.
Whether you’re looking to reduce your chemical or cleaning expenses, protect your investment from debris and weather, or ensure the safety of your family, choosing a pool cover that meets your specific needs is vital.
There’s a cover for every type of pool and lifestyle—from affordable solar blankets to custom automatic systems—and when used correctly, they all deliver long-term benefits.
By taking the time to cover your pool, you not only extend its usability and cleanliness but also ensure peace of mind and savings.
1. Why should I cover my pool when it’s not in use?
Covering your pool when it’s not in use offers several important benefits, the most notable being the prevention of debris accumulation. Leaves, dirt, insects, and other outdoor elements can easily fall into an uncovered pool, leading to cloudy water, increased chemical usage, and additional strain on your filtration system. By using a pool cover, you significantly reduce the amount of cleaning and maintenance required, especially during seasons when the pool is used less frequently.
Additionally, a pool cover helps preserve water quality and temperature, which is especially useful if you’re trying to extend your swimming season or reduce energy costs for heated pools. Covers also act as a barrier that minimizes evaporation, potentially saving hundreds of gallons of water over time. In terms of safety, a sturdy cover can prevent accidental falls into the pool, particularly for homes with children or pets, making it a smart investment on multiple levels.
2. What types of pool covers are available and which one is best for me?
There are several types of pool covers available, including solar covers, winter covers, safety covers, and automatic covers, each serving different purposes. Solar covers are ideal for outdoor pools exposed to sunlight, as they help retain heat and reduce chemical loss. Winter covers are thicker and are used during the off-season to protect the pool from debris and weather damage.
Safety covers, often made of strong mesh or solid material, are designed to support weight, offering protection against accidents and are tightly secured around the pool’s edge. Automatic covers, though more expensive, offer the most convenience by opening and closing with the push of a button and are excellent for frequently used pools. Choosing the best cover depends on your specific needs, climate, usage frequency, and budget. Consulting with a pool professional can help ensure you pick the most suitable one for your situation.
3. Do pool covers help save on chemical costs?
Yes, using a pool cover can help reduce the amount of chemicals needed to maintain proper water balance. When a pool is left open, sunlight, debris, and rainwater can alter pH levels and chlorine concentration, requiring additional chemicals to keep the water clean and safe. A cover shields the water from direct sunlight and contamination, slowing down the depletion of sanitizers and stabilizing the chemical balance.
This reduction in chemical demand not only lowers your maintenance expenses but also contributes to a more eco-friendly pool environment. Over time, less frequent chemical adjustments mean fewer disruptions to the water chemistry and reduced wear on your pool equipment. Whether you use a solar cover, winter cover, or safety cover, all types can contribute to lowering your reliance on cleaning agents and algaecides, helping you maintain a healthier and more economical pool.
4. How does a pool cover affect energy costs?
A pool cover can significantly lower energy costs, especially for pools with heaters. Water exposed to the air cools down quickly, particularly at night or in cooler weather, causing the heater to run more frequently to maintain a desired temperature. A thermal or solar cover traps heat in the water, reducing the workload on the heating system and ultimately lowering your energy bill.
In addition to preserving heat, covers also minimize evaporation, which is a primary cause of heat loss in swimming pools. The less water that evaporates, the less energy is needed to replace or reheat it. For pool owners who value comfort and long swim seasons, investing in a high-quality cover is a practical and efficient way to make pool heating more affordable while ensuring consistent water temperature.
5. Can covering my pool prevent accidents?
Yes, certain types of pool covers, especially safety covers, are designed to provide a layer of protection against accidents. These covers are made from durable materials capable of supporting the weight of a person or animal and are tightly anchored around the pool’s perimeter. While they are not a substitute for constant supervision, they can help prevent young children or pets from falling into the water when the pool is not in use.
It’s important to note that only safety-rated covers meet the standards for accident prevention, and they should always be installed correctly according to the manufacturer’s guidelines. Mesh safety covers allow water to drain through while still offering strength and security, whereas solid safety covers provide a barrier that doesn’t allow anything to pass through. Choosing and maintaining the proper safety cover is essential for this protective function.
6. How often should I remove the pool cover for maintenance?
Even when using a pool cover regularly, it’s important to remove it periodically for maintenance and inspection. Depending on the type of cover and local weather conditions, removing the cover once every week or two allows you to check water chemistry, run the filter system, and ensure the cover itself remains clean and free of mold or algae buildup.
It also gives you the opportunity to skim or clean any debris that may have collected on the top of the cover or around the edges of the pool. Routine inspections help catch imbalances or mechanical issues early, preventing more serious damage or a costly cleanup later. Maintaining this cycle of coverage and inspection ensures your pool remains in good condition year-round.
7. Is it necessary to cover my pool during the summer months?
While summer is often peak swimming season, covering your pool during this time can still be beneficial, particularly if the pool isn’t used daily. Leaving it exposed to constant sunlight and weather can lead to rapid evaporation, chemical loss, and debris buildup, which may affect water clarity and safety. A solar cover, for example, helps retain heat and reduces the need for frequent chemical adjustments when the pool is not in use for a few days.
Additionally, covering your pool during hot summer periods can offer some protection against sudden storms or windblown debris. It also reduces the chances of green water due to algae growth by limiting sunlight exposure. If you’re away for a few days or planning a vacation, even during summer, placing a cover on the pool can help maintain stable water conditions and reduce the time needed to prepare it for use upon your return.