How To Put A Cover On An Above Ground Pool
Properly installing an above ground pool cover requires meticulous surface preparation, accurate center-point alignment, and secure tensioning using winch-and-cable systems or leaf net attachments. Master the techniques of water-bag placement, wind-load mitigation, and tension distribution to protect your pool membrane and extend equipment longevity through freezing winters or off-seasons.
Pre-Operation & Equipment Checklist
Securing an above ground pool cover successfully relies on having the right materials and understanding the environmental parameters before starting the physical installation. Attempting to install a cover over unconditioned water or without proper anchoring hardware leads to wind tearing, premature material fatigue, and structural stress on the pool’s top ledge.
Essential Gear, Tools, and Materials:
- Heavy-duty winter or solar cover sized correctly for your pool dimensions (accounting for wall height and top rail overhang)
- Vinyl-coated steel perimeter cable and a heavy-duty ratchet winch
- Air pillow (winter pillow) and a low-pressure inflation pump or blower
- Non-abrasive pool brush and a high-volume submersible water pump or siphon
- Protective wall cushions, foam covers, or pool noodle guards for sharp top ledges
- Water tubes or winter wall bags (for perimeter security on un-decked frames)
Mandatory Prerequisite Knowledge and Standards:
- Water level stabilization must be maintained between 4 to 6 inches below the skimmer mouth (for winterizing) to prevent ice expansion damage while keeping enough weight to anchor the center.
- Chemical balancing should be completed 48 hours prior to cover installation, ensuring total alkalinity between 80-120 ppm, pH between 7.2-7.6, and a winterizing algaecide dose fully circulated.
Estimated Budget and Duration Benchmarks:
- Project duration: 45 to 90 minutes for a two-person team.
- Average tool and material investment: $50 to $300 depending on cover grade (standard polyethylene vs. heavy-duty reinforced mesh).
Step-by-Step Above Ground Pool Cover Installation Workflow
Step 1: Clean the Pool Surface and Balance Water Chemistry
Before placing any protective material over the basin, clear all organic debris, floating leaves, and particulate matter using a skimmer net and vacuum. Balance the chemical baseline to eliminate algae growth vectors during the covered period. Lower the water level precisely below the skimmer faceplate—typically 4 to 6 inches down—to protect your ABS plastic fittings and return jets from freezing expansion cycles.
Warning: Never drain an above ground pool completely for winter. The hydrostatic pressure of the surrounding saturated soil or ground shifts can cause pool walls to buckle inward or collapse completely.
Step 2: Inflate and Position the Air Pillow
Inflate your vinyl winter air pillow to approximately 60 to 70 percent capacity. Over-inflating causes the plastic to rupture under low temperatures and ice weight, while under-inflating renders it useless against surface ice expansion. Tie nylon ropes to the built-in grommets of the pillow and anchor them to opposite sides of the pool top rails so the pillow rests securely in the exact geometric center of the water surface.
Pro-Tip: Position the air pillow so it absorbs the lateral pressure of expanding surface ice, transferring the vector force inward rather than outward against your steel walls and liners.
Step 3: Unfold and Drape the Cover Across the Span
Enlist a second person to help handle the cover material. Unroll or unfold the cover near the perimeter, then lift and float it across the surface of the water from opposite sides. Avoid dragging the material across rough top rails or sharp deck screws, which can cause micro-abrasions or tears in the reinforced polyethylene. Center the excess overhang evenly around the entire circumference of the pool wall.
Step 4: Thread the Perimeter Cable and Attach the Winch
Locate the hem pockets or grommets running along the outer perimeter of the pool cover. Thread the vinyl-coated steel cable sequentially through every eyelet or sleeve all the way around the pool. Once the cable forms a complete loop, insert both ends into the heavy-duty ratchet winch.
Step 5: Tension and Lock the Winch Mechanism
Crank the winch handle to draw the cable tight against the exterior wall beneath the top ledge. Pull the slack through progressively while cranking, ensuring the tension distributes evenly across the entire circumference. The cover should be snug enough to resist mild wind uplift, but not so tight that it lifts off the water surface or pulls the cable completely out of the grommets under thermal contraction.
Step 6: Secure Auxiliary Wind Mitigation Measures
For areas prone to high wind velocity, install cover clips or wrap a heavy-duty cover wrap band around the outer perimeter rail system to eliminate fluttering. If your pool features an attached wooden deck, ensure the decking overhang does not rub against the cover material during high winds; add foam pipe insulation along any abrasive deck edges where the cover makes contact.
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Above Ground Pool Cover Material Properties and Selection Matrix
Choosing the correct cover tier dictates performance longevity, chemical resistance, and maintenance overhead during off-seasons.
| Cover Material Type | Tensile Strength & Weight | UV Resistance Rating | Average Lifespan | Primary Maintenance Requirement |
|---|---|---|---|---|
| Standard Polyethylene | Low-Medium (8x8 to 10x10 scrim) | Moderate (Standard inhibitors) | 1 to 3 Seasons | Frequent water removal from top; prone to UV degradation. |
| Heavy-Duty Polyethylene | High (12x12 to 14x14 scrim) | High (Multi-layer UV coating) | 4 to 7 Seasons | Periodic cable tension adjustments and debris clearing. |
| Reinforced Mesh Covers | Ultra-High (Woven monofilament) | Maximum (Commercial-grade inhibitors) | 6 to 10 Seasons | Spring chemical wash-down; allows rainwater filtration. |
Common Site Failures and Field Fixes
Even with precise installation, environmental forces can compromise your pool cover setup. Address these common field issues immediately to prevent structural damage.
Root Cause: High winds catch slack in the cover, causing the cable to slip off the top ledge and the cover to blow into the pool basin.
- Actionable Fix: Re-center the cover, re-thread the cable through all eyelets, and apply heavy-duty pool cover clips every 3 feet along the top rail to lock the hem in place.
Root Cause: Excessive rainwater or melting snow accumulates on top of a solid polyethylene cover, pulling the material downward and sinking the edges into the water.
- Actionable Fix: Use a submersible pool cover pump to drain standing water immediately. Inspect the center air pillow to ensure it has not deflated or shifted off center.
Root Cause: The steel cable snaps under extreme cold-weather contraction or over-tightened winch tension.
- Actionable Fix: Replace the damaged cable with a thicker vinyl-coated steel replacement line, and leave a slight amount of operational play in the winch ratchet to account for freezing thermal contraction.
Frequently Asked Questions
How much water should I leave in an above ground pool when putting on a winter cover?
You should lower the water level to between 4 and 6 inches below the skimmer return and jets. This specific threshold prevents water from entering the skimmer housing and freezing, while still leaving enough water weight in the basin to support the cover and anchor the center air pillow.
Do I really need an air pillow under my above ground pool cover?
Yes, an air pillow is critical for solid winter covers because it absorbs the immense lateral expansion force of freezing surface ice. Without a pillow, expanding ice pushes directly outward against the steel pool walls, leading to structural warping, liner tears, or wall collapse.
How do I prevent water from pooling on top of my solid pool cover?
You can prevent heavy water accumulation by positioning a submersible electric pool cover pump in the lowest depression of the cover. Plug the pump into a GFCI outlet and run it periodically after heavy rains or snowmelts to relieve weight stress on the perimeter cable.
Can I use a solar cover as a winter cover?
No, solar covers are engineered exclusively for heat retention and daytime debris blocking during the active swim season. They lack the structural weave, tensile strength, and UV inhibitors required to survive freezing winter temperatures, snow loads, and multi-month environmental exposure.
What is the best way to secure a pool cover if my pool has an attached deck?
Use a combination of your standard perimeter cable winch along the exposed walls, and secure the deck-side perimeter using heavy-duty water bags, deck weights, or specialized cover springs anchored directly into the wooden decking framework. Ensure you pad any abrasive wood edges with foam insulation to prevent friction tears.
Contact our pool maintenance specialists today to find the exact cover grade and winterization accessories tailored to your specific pool dimensions and local climate.
