Choosing the right above ground winter pool covers transforms your spring opening from a toxic, multi-day chore into a simple hours-long routine. If you pick a cheap, flimsy tarp, you'll likely find it shredded by January winds, leaving behind a swamp of decaying leaves and black algae. Protecting your pool investment requires matching your winter climate, local tree coverage, and pool deck setup to the correct cover style, weight, and installation hardware.
Search intent for this topic centers on product comparison, durability metrics, and practical sizing guidelines to avoid common winter failures. Pool owners want to know whether mesh or solid styles suit their region, how to measure correct overlap dimensions, and why standard cables often snap under freeze-thaw cycles. We'll break down the exact performance differences between woven polyethylene and safety meshes, walk through sizing math, and address the maintenance questions most guides skip.
Types of Above Ground Winter Covers
Different backyard environments demand distinct cover constructions. Understanding what manufacturers use to build these products helps you evaluate real-world durability far beyond marketing claims.
Standard Solid Polyethylene Covers
Solid polyethylene tarps remain the most common choice for budget-conscious owners. These covers block 100 percent of sunlight, which stops algae spores from photosynthesizing during warm winter spikes.
- Construction: Woven high-density polyethylene strips coated with UV-resistant layers. Look for a high denier count or heavier scrim rating (such as 12x12 threads per square inch) to prevent rips.
- The Catch: Rain and melting snow accumulate on top. You'll need a submersible cover pump or siphon hose to remove standing water regularly so the weight doesn't tear the material or pull your top rails inward.
Rugged Mesh Covers
Mesh covers feature a tight, permeable weave that allows rainwater and melted snow to pass directly into the pool while filtering out twigs and leaves.
- Construction: Heavy-duty polypropylene or coated mesh engineered to withstand severe UV exposure and heavy ice loads without sagging.
- The Catch: Because water filters through, fine silt and dust can enter the pool water. Spring opening requires a heavier dose of initial shocking and balancing, though you avoid the hassle of pumping standing water off the top.
Safety vs. Standard Tarps
Standard winter tarps offer zero structural safety; they cannot support the weight of a child or pet walking across the surface. If you have a walk-around deck built flush with your above ground pool rim, you can sometimes anchor heavy-duty safety covers that lock into the deck framing. For standard freestanding pools without deck integration, a standard tarp secured with a cable and winch remains the universal standard.
Sizing and Measuring Your Pool Correctly
Ordering the wrong size cover is the number one reason winter installations fail. Manufacturers build standard above ground winter pool covers with built-in "overlap" to account for the pool's top rail height and the space needed to wrap a cable around the perimeter.
- For Round Pools: Measure the outer rim diameter from outside-to-outside of the metal wall, not the inner water width. If you have a 24-foot round pool, buy a cover sized for a 24-foot pool because manufacturers already add a 3- to 4-foot overlap into the dimensions.
- For Oval Pools: Measure the longest and shortest straight outer wall spans. Never guess your oval dimensions, as manufacturers require precise wall measurements to account for side buttresses.
- Extra Rails or Decks: If your pool features extra-wide resin top ledges, bulky uprights, or protruding pool steps, bump up your cover size by one tier to ensure the cable can still secure beneath the bottom ledge without stretching taut.
Essential Winter Accessories
A cover alone won't survive harsh winter weather. Proper hardware and accessories distribute stress evenly across your pool structure.
Vinyl Air Pillows
For solid covers, placing a heavy-duty air pillow in the exact center of the pool is non-negotiable.
- What it does: The pillow absorbs the expansion pressure of freezing ice, pushing outward against the water rather than inward against your steel pool walls.
- Setup Tip: Never inflate an air pillow to maximum capacity. Fill it roughly 60 to 70 percent full so it can flex under pressure without popping. Tie it securely with nylon rope to opposite sides of the pool wall so it stays centered all winter.
Heavy-Duty Cables and Winches
Cheap plastic-coated steel cables degrade quickly in freezing temperatures. Invest in a vinyl-coated aircraft cable paired with a rust-resistant ratchet winch. When threading the cable through the eyelets or grommets of your cover, alternate weaving from inside to outside to distribute tension evenly. Tighten the winch firmly, but check it after the first hard freeze, as cold air causes steel cables to contract and tighten further.
Wall Wraps and Cover Clips
In high-wind zones, winter breezes catch the underside of loose covers, causing them to whip violently against the top ledges. This friction wears through the vinyl liner.
- Cover Clips: Heavy-duty plastic clips snap over the cover and the top rail every few feet to eliminate flapping.
- Wall Wraps: Plastic sheeting wrapped around the exterior of the pool wall underneath the top rail prevents wind from lifting the cover edges.
Common Mistakes to Avoid
Avoiding operational missteps during pool closing saves hundreds of dollars in spring repairs.
- Lowering water too far: Never drain your above ground pool completely for the winter. Groundwater pressure from below can cause an empty vinyl liner to shrink, float, or crack. Keep water levels about 4 to 6 inches below the skimmer return jet.
- Ignoring standing water: Letting hundreds of pounds of stagnant water sit on a solid cover stresses the wall seams. Clear water off the surface whenever accumulation exceeds two inches.
- Skipping winterizing chemicals: Closing a clean pool with zero algaecide or balancing chemicals guarantees a thick green swamp in April, regardless of how good your cover is. Add a specialized winterizing kit containing long-lasting algaecide and sequestering agents before cinching the cover down.
Frequently Asked Questions
Can I reuse my winter pool cover next year?
High-grade covers with thick scrims and strong UV inhibitors typically last three to five seasons. If you notice extensive fading, brittleness, small pinhole leaks, or fraying seams by spring, it's time to replace it before winter sets in again.
How do I keep animals from chewing on my pool cover?
Rodents and neighborhood cats are attracted to standing water or nesting spots on soft vinyl. Keep the cover taut, remove fallen debris promptly, and use safe animal deterrent sprays around the perimeter if you notice chewing damage.
Should I use a leaf net on top of my solid winter cover?
Yes. Placing a mesh leaf net over your solid cover during autumn makes clean-up effortless. Once the heavy deciduous trees drop their leaves, simply lift off the leaf net loaded with debris, leaving your solid winter cover clean underneath.
Why is my pool cover sinking in the middle?
A sinking solid cover usually means your center air pillow has deflated or shifted off-center. Deflate the old pillow, check for punctures, re-inflate it to 60 percent capacity, and secure it tightly with anchor lines running to the pool frame.
